Working for Clean Water

Last month New York passed the Clean Water Infrastructure Act which allocates $2.5 billion to a variety of projects to improve the safety of drinking water in that state, my childhood home. The legislation will among other things provide $1.5 billion in grants for water infrastructure improvements, $75 million in rebates to help homeowners replace septic systems and $110 million to protect land in watersheds. This legislation significantly expands a similar state infrastructure fund that over the past few years made $400 million available to communities, though falls short of the $80-$100 billion the State’s Legislature Environmental Conservation Committee says is needed to fix the state’s aging water infrastructure.

The water quality problem especially on Long Island in Suffolk County is reported to be acute- every water body within the county is listed as impaired with dead rivers, closed beaches, and harmful algae blooms. It is reported that Suffolk County has 360,000 septic systems. For years, nitrogen along with E. coli from leaky septic tanks has seeped into groundwater and eventually into rivers and bays. Water quality has continued to decline over the decades.

The county’s current strategy is to build two sewer systems in business districts on the North Shore in Suffolk County and “coax” homeowners to replace antiquated septic systems with high-tech “denitrification systems.” The challenge, however, is “coaxing” homeowners to replace their septic tanks. The problem with an old system is that unless septic is backing up into the house, most people don’t know their system is failing.

Nitrogen is more harmful to coastal ecosystems than to sources of drinking water. The federal standard for drinking water is 10 milligrams per liter, but anything above one milligram per liter will have an impact on coastal waters and estuaries. In Suffolk County, the average concentration of nitrogen in groundwater is four milligrams per liter, and with nitrogen, there is usually also E. coli.

Across the United States, tremendous improvements in water quality have been made in the decades after passage of the Clean Water Act in 1972. The biggest sources of chemical and biological pollution, the so called “point sources,” those releases from manufacturing and sewage treatment plants have been addressed. Sewage treatment plants have been build and improved, and waste streams regulated. The problem now is diverse and small sources of pollution that impact overall water quality and ecology.

Back home in Virginia, the EPA mandated a contamination limit called the TMDL (total maximum daily load for nutrient contamination and sediment) to Virginia and all the states in the Chesapeake Bay Watershed and Washington DC. Locally, the Chesapeake Bay TMDL addresses the contamination from nitrogen, phosphorus and sediments. However, there are other contaminants impacting the waterways of Prince William County- E. coli is among them.

 

Prince William county has been subject to TMDLs for bacteria impairments to: Cedar Run and Licking Run, Neabsco Creek, Popes Head, Broad Run, Kettle Run, South Run, Little Bull Run, Bull Run and the Occoquan River; and Tributaries to the Potomac River for years, but little has been done because the diverse sources of the problem.

The Department of Environmental Quality identified the primary sources of bacteria as follows:

• Cedar Run: livestock (65%), wildlife (26%) upland pervious land (9%), impervious (<1 li="" nbsp="">
• Neabsco Creek: wildlife (79%), pet sources (20%), livestock (1%)
• Broad Run: cattle – direct deposition (44%), residential, commercial, industrial (41.5%), wildlife – direct deposition (6.4%) 
• Bull Run: cattle – direct deposition (56%), wildlife – direct deposition (30%), residential, commercial, industrial (13%) 
• Occoquan River: residential, commercial, industrial (85.7%), wildlife – direct deposition (9.2%) 
• Powells Creek: urban – developed land (87%) 
• Quantico Creek: urban – developed land (94%) 

Prince William County needs to commit funds and work with their partners to develop ongoing program to address the bacterial contamination not coming from the permitted stormwater system. This means stream exclusion of cattle, outreach programs and possibly financial incentives to pump-out septic tanks and upgrade septic systems, programs to develop community pet waste stations, and other programs. Our waterways and environment are worth it.

Iron Bacteria More than a Nuisance

Recently, we had a water clinic in Prince William County. After the results meeting we received the following email. "[Based on your description during the well clinic] it appears that I have iron bacteria in my water system.  When I had my well pump replaced in 2013, the old pump and the pipes in the well were all covered with orangey brown slime.  In addition, there are always orangey red particles trapped in my sediment filter before the water enters the treatment tanks, as well as orangey red stains on my shower tiles, and orangey red water in toilets.  Also, there are brown to black, hard to remove rings in toilets.

I have a water treatment system and I collected two (2) sets of samples, before and after the treatment.  My well water before the treatment contains 0.01 mg/L of Iron, but the greensand tank with Potassium Permanganate appears to reduce that concentration to below detection limit.  If so, then why do I have iron and/or iron bacteria in bathrooms past the treatment system?  Perhaps the iron in the toilet water comes from the rusting metal equipment and bolts inside the flush tanks, but that would not explain the rusty stains on my shower tiles.  My well is 400 ft. deep, with the pump at 320 ft., and the water level at 60 ft.  I consider shocking my well with chlorine solution, but first I would like to verify if that is the right approach."

The test for iron does not test for iron bacteria. Iron Bacteria are small living organisms which naturally occur in soil and water. These nuisance bacteria depend on oxidation of iron and manganese for “food.” These bacteria form the characteristic deposits of “rust”, and a slimy build up that does not test positive for iron. The most common bacteria known to feed on iron are thiobacillus ferrooxidans and leptospriillum feffooxidans. There are also acidohillic iron bacteria, like the autotrophi ferrobaccillus ferroxidans that are associate with the acidic environment or mines and not often seen in groundwater wells.

Iron bacteria can be a huge nuisance. These harmless bacteria can foul a well, damage pumps, stain plumbing fixtures, clog pipes, faucets, showerheads, and produce unpleasant tastes and odors in drinking water. Yet, water is very rarely tested for iron bacteria since very few certified laboratories conduct the test. Confirmation is usually based on visual symptoms in the water, including the slimy brown/red appearance (often most noticeable in the toilet tank) and a slight musty odor. There are no drinking water standards for iron bacteria since there are no health implications. A true “Iron Bacteria Test” involves an 8 day bacteria culture. These tests cost around $40-$80 and require a sterile sample bottle and collection method as all bacteria tests require. Also, once the iron bacteria have infected a well and plumbing system is very difficult to get rid of. Treatment of heavily infected wells may be only partially successful, but often that’s enough.

Iron bacteria often produce unpleasant tastes and odors commonly reported as: "swampy," "oily or petroleum," "cucumber," "sewage," "rotten vegetation," or "musty." The taste or odor may be more noticeable after the water has not been used for some time and are not easily explained by other causes. Iron bacteria do not produce the "rotten egg" smell common to hydrogen sulfide, but do create an environment where sulfur bacteria can grow and produce hydrogen sulfide. There is often a discoloration of the water with the iron bacteria causing a slight yellow, orange, red or brown tint to the water. It is sometimes possible to see a rainbow colored, oil-like sheen on the water. Though the classic symptom of iron bacteria is a rust colored slime, but may be yellow, brown, or grey.

You can order an Iron Bacteria Test from National Testing Laboratories- that’s where I got my test. They have an assay test for “Iron Related Bacteria” present in a water sample. Iron bacteria once introduced into the well will not get better, but continue to get worse destroying your pump and ultimately fouling the well. Along the way there will be a perceived deterioration in the quality of the water. Although iron bacteria can make water unpleasant in taste or smell, there is no health risk associated with the bacteria. They are harmless, but annoying. Elimination of iron bacteria once a well is heavily infested can be extremely difficult. Normal treatment for a problem such as this would be to chlorine “shock,” but iron bacteria can be particularly persistent and chlorine treatment of the well may be only partly effective.

If the wall is fouled then physical removal is done as a first step in these heavily infected wells where the functioning of the pump and well production have already been impacted by the bacterial slime buildup. The pumping equipment in the well must be removed and cleaned, which is usually a job for a well contractor or pump installer. The well casing is then scrubbed using (disinfected) brushes or other tools. Physical removal is usually followed by chemical treatment with chlorine (or less commonly acids). Chlorine is inexpensive and easy to use, but may have limited effectiveness and may require repeated treatments. Effective treatment requires sufficient chlorine strength and time in contact with the bacteria, and is often improved with agitation. Though typically a chlorine concentration of 200 parts per million for decontamination of a well, a higher concentration is recommended by the literature for iron bacteria. Recommended concentrations are between 500-1,000 parts per million. Be warned that too high a concentration can make the well alkaline and reduce effectiveness. In addition high concentrations of chlorine may affect water conditioning equipment, appliances such as dishwashers, and septic systems. You may want to check with the manufacturer of the appliances before chlorinating.

Though it is relatively easy to bypass equipment, iron bacteria may remain in the untreated units and reintroduce the iron bacteria into the plumbing system. The recommended strategy is to treat the well with a 500-1,000 parts per million of chlorine and then dilute the remaining water in the well. This can be accomplished by allowing a significant amount of the water to runoff to a safe disposal location using hoses until the water runs clear, and allow the well to refill and dilute the concentration then introduce the water into the house water system to disinfect the household treatment units, appliances and piping with lower concentrations circulated through the water system. I use chlorine test strips to get an idea of the level of chlorine in the well.

I found my iron bacteria problem before it fouled my well or plumbing system. Only a small amount of iron bacteria had begun to build up around the flapper in my toilet tanks. The ATU unit of my alternative septic system caused the iron bacteria in that tank to grow uncontrollably. The same thing happens with Iron Filters that use air injection-they actually increase bacterial slime and make things worse. Filters using chlorine injection work or a simple chlorine injection system works quite well at controlling the problems of order and staining quite well. However, it is best to knock the problem back in the well and then retreat every two to three years. Every time I treat my well and plumbing system, I finish the process by scrubbing my septic tanks and restarting the septic system. This reminds me that I need to open up my ATU tank and take a look...it is probably time to treat my well again. 

The Wells of Prince William County 2017

Every Year as part of the Virginia Household Water Quality Program Prince William County Extension holds a drinking water clinics for well owners. This year the clinic was oversubscribed and there will be a second sampling date on June 7th . The first group of samples were  taken March 29th 2017 and analyzed for: iron, manganese, nitrate, lead, arsenic, fluoride, sulfate, pH, total dissolved solids, hardness, sodium, copper, total coliform bacteria and E. Coli bacteria at a cost of $55 to the well owner.

What we test for are mostly the naturally occurring contaminants and common sources of contamination: a poorly sealed well or a nearby leaking septic system, or indications of plumbing system corrosion. Though this is not an exhaustive list of potential contaminants, these are the most common contaminants that effect drinking water wells. The chart below shows what we found in the 101 private wells tested in the first round in Prince William County in 2017.

In order to determine if treatment is necessary, water test results should be compared to a standard. The standard we use is the U.S.EPA Safe Drinking Water Act (SDW) limits. Though private wells do not fall under the regulatory authority of the U.S. Environmental Protection Agency (EPA) or the Safe Drinking Water Act, the SDW act has primary and secondary drinking water standards that we use for comparison. Primary standards are ones that can impact health and from the tested substances include: coliform bacteria, E. coli bacteria, nitrate, lead, and arsenic. Secondary standards impact taste or the perceived quality of the water.

As in last year, the 2017 Prince William County water clinic found that almost 28% of the wells tested present for coliform bacteria-this was a lower percentage than the overall program finds. Coliform bacteria are not a health threat itself, it is used to indicate other bacteria that may be present and identify that a well is not properly sealed from surface bacteria. The federal standard for coliform bacteria is zero, but the federal standard allows that up to 5% of samples can test positive for coliform during a month.

Four of the homes tested positive for E coli. Fecal coliform and E. coli are bacteria whose presence indicates that the water is contaminated with human or animal wastes. Disease-causing microbes (pathogens) in these wastes can cause diarrhea, cramps, nausea, headaches, or other symptoms. These pathogens may pose a special health risk for infants, young children, and those with compromised immune systems. However, people can drink water contaminated with fecal bacteria and not notice. If your water is contaminated with coliform but not fecal coliform or E. coli, then you have a nuisance bacteria problem and the source may be infiltration from the surface from rain or snow melt. Typical causes are improperly sealed well cap, failed grouting or surface drainage to the well. Shock chlorinate the well, repack the soil around the well pipe to flow away from the well and replace the well cap. Then after the next big rainstorm retest the well for coliform. If it is still present then a long-term treatment should be implemented: using UV light, ozonation, or chlorine for continuous disinfection. These systems can cost up to $2,000 installed.

If you have fecal coliform in the well or E. coli, your well is being impacted by human or animal waste and you are drinking dilute sewage. If there is not a nearby animal waste composting facility, then you are probably drinking water from a failed septic system- yours or your nearest neighbors. To solve this problem you need to fix or replace the septic system that is causing the contamination, replace the well or install a disinfection and filtration system. Disinfection does not kill Giardia or Cryptosporidium, two microscopic parasites that can be found in groundwater that has been impacted by surface water or sewage. Both parasites produce cysts that cause illness and sometimes death.

Membrane filtration is the usual treatment for these parasites- a one micron membrane is required after disinfection and can be accomplished at home with a reverse osmosis system. The failing septic systems can often be identified by using tracer dyes. While continuous disinfection will work to protect you from fecal bacteria and E. coli, be aware that if your well is being impacted by a septic system, then the well water might also have present traces of all the chemicals and substances that get poured down the drain. Long term treatment for disinfection, and micro-filtration should be implemented: using UV light, ozonation, or chlorine for continuous disinfection, carbon filtration, and anything that is used for drinking should be further treated with a reverse osmosis systems or micro membrane system that work by using pressure to force water through a semi-permeable membrane. Large quantities of wastewater are produced by reverse osmosis systems and need to bypass the septic system or they will overwhelm that system creating more groundwater problems. Reverse osmosis systems produce water very slowly, a pressurized storage tank and special faucet needs to be installed so that water is available to meet the demand for drinking and cooking.

Nitrate can contaminate well water from fertilizer use; leaking from septic tanks, sewage and erosion of natural deposits. None of the wells in our group of 101 samples had nitrate levels above the MCL. The MCL for nitrate is 10 mg/L. Infants below the age of six months who drink water containing nitrate in excess of the MCL could become seriously ill from blue-baby syndrome and, if untreated, may die. Symptoms include shortness of breath and a blue ting to the skin common in blue-baby syndrome. The NO3 dissolves and moves easily through soil which varies seasonally and over time as plants use up the nitrate over the summer. Testing in the spring will usually produce the highest levels. Nitrate may indicate contamination from septic tanks, but do not boil the water- boiling water reduces the water and actually INCREASES the concentration of nitrates. Reverse osmosis, or ion exchange is necessary to control the nitrate.

In years past the water clinic has found almost 20% of wells tested positive for lead. This year we had 6.9% of homes have first flush lead levels above the SDWA maximum contaminant level of 0.015 Mg/L. After the first flush only two homes had lead levels above the 0.15 mg/L level; however, many scientists do not believe that any level of lead is safe to drink over an extended period of time. In the homes that had elevated lead in the first draw, it tends to be negatively correlated with pH values. Houses built before 1988 when the ban on lead went into effect and had low pH water had higher lead concentrations. Lead leaches into water primarily as a result of corrosion of plumbing and well components, but can also result from flaking of scale from brass fittings and well components unrelated to corrosion and corrosion control techniques such as adjusting pH or alkalinity that are commonly used to neutralize aggressive water will not work in those cases. For most instances, though, a neutralizing filter and lead removing activated carbon filters can be used to remove lead. Recently, some home water treatment companies are offering in home treatment systems that neutralize the water and add orthophosphate other phosphate solution to coat the piping to prevent further corrosion. It should work, but I have never seen such a home system and am not aware of any testing. It is important to note that elevated lead concentrations were still observed in homes built after 1988 and in one home with normal pH and built after 2000.

Iron and manganese are naturally occurring elements commonly found in groundwater in this part of the country. 9.9% of the wells tested exceed the iron standard and 4% exceeded the manganese standard. At naturally occurring levels iron and manganese do not present a health hazard. However, their presence in well water can cause unpleasant taste, staining and accumulation of mineral solids that can clog water treatment equipment and plumbing and discolored water. The standard Secondary Maximum Contaminant Level (SMCL) for iron is 0.3 milligrams per liter (mg/L or ppm) and 0.05 mg/L for manganese. This level of iron and manganese are easily detected by taste, smell or appearance. In addition, some types of bacteria react with soluble forms of iron and manganese and form persistent bacterial contamination in a well, water system and any treatment systems. These organisms change the iron and manganese from a soluble form into a less soluble form, thus causing precipitation and accumulation of black or reddish brown gelatinous material (slime). Masses of mucous, iron, and/or manganese can clog plumbing and water treatment equipment.

All systems of removing iron and manganese essentially involve oxidation of the soluble form or killing and removal of the iron bacteria. When the total combined iron and manganese concentration is less than 15 mg/l, an oxidizing filter is the recommended solution. An oxidizing filter supplies oxygen to convert ferrous iron into a solid form which can be filtered out of the water. Higher concentrations of iron and manganese can be treated with an aeration and filtration system. This system is not effective on water with iron/ manganese bacteria, but is very effective on soluble iron and manganese so you need to do further testing to determine what type of iron/manganese you have before you install a treatment system. Water softeners can remove low levels of iron, but are not recommended for just this purpose. Chemical oxidation can be used to remove high levels of dissolved or oxidized iron and manganese as well as treat the presence of iron/manganese (or even sulfur) bacteria. The system consists of a small pump that puts an oxidizing agent into the water before the pressure tank. The water will need about 20 minutes for oxidation to take place so treating before a holding tank or pressure tank is a must. After the solid particles have formed the water is filtered. The best oxidizing agents are chlorine or hydrogen peroxide. If chlorine is used, an activated carbon filter is often used to finish the water and remove the chlorine taste. The holding tank or pressure tank will have to be cleaned regularly to remove any settled particles.

The pH of water is a measure of the acidity or alkalinity. The pH is a logarithmic scale from 0 – 14 with 1 being very acidic and 14 very alkaline. Drinking water should be between 6.5 and 7.5. For reference and to put this into perspective, coffee has a pH of around 5 and salt water has a pH of around 9. Corrosive water, sometimes also called aggressive water is typically water with a low pH. (Alkaline water can also be corrosive.) Low pH water can corrode metal plumbing fixtures causing lead and copper to leach into the water and causing pitting and leaks in the plumbing system. The presence of lead or copper in water is most commonly leaching from the plumbing system rather than the groundwater. Acidic water is easily treated using an acid neutralizing filter. Typically these neutralizing filters use a granular marble, calcium carbonate or lime. If the water is very acidic a mixing tank using soda ash, sodium carbonate or sodium hydroxide can be used. The acid neutralizing filters will increase the hardness of the water because of the addition of calcium carbonate. The sodium based systems will increase the salt content in the water. 9.9% of the wells tested were found to have acidic water this year. High pH levels are not natural to groundwater and typically result from salt water intrusion or over treatment with water softening system and/acid neutralizing systems. There were two homes where this turned out to be the case.

Water that contains high levels of dissolved minerals is commonly referred to as hard. Groundwater very slowly wears away at the rocks and minerals picking up small amounts of calcium and magnesium ions. Water containing approximately 125 mg/L can begin to have a noticeable impact and is considered hard. Concentrations above 180 mg/L are considered very hard. As the mineral level climbs, bath soap combines with the minerals and forms a pasty scum that accumulates on bathtubs and sinks. You either must use more soap and detergent in washing or use specially formulated hard water soap solutions. Hard water can be just a minor annoyance with spotting and the buildup of lime scale, but once water reaches the very hard level 180 mg/L or 10.5 grains per gallon, it can become problematic. This year we had a well test at 505.7 mg/L, but overall on 15.8% of homes tested had hard water. Given the number of homes with elevated sodium and our local geology, it is probably a reflection of the number of homes with water softeners.

Water softening systems are used to address the problem are basically an ion exchange system. The water softening system consists of a mineral tank and a brine tank. The water supply pipe is connected to the mineral tank so that water coming into the house must pass through the tank before it can be used. The mineral tank holds small beads of resin that have a negative electrical charge. The calcium and magnesium ions are positively charged and are attracted to the negatively charged beads. This attraction makes the minerals stick to the beads as the hard water passes through the mineral tank. Sodium is often used to charge the resin beads. Water softeners can be used to remove small amounts of other metals like iron and some forms of arsenic. As the water is softened, the sodium ions are replaced and small quantities of sodium are released into the softened water, thus the salty taste of softened water. When the water softening system is recharged the excess sodium solution carrying the calcium and magnesium is flushed to the septic system which may shorten the life of the drain field.

At the present time the EPA guidance level for sodium in drinking water is 20 mg/L. This level was developed for those restricted to a total sodium intake of 500 mg/day and does not necessarily represent a necessary level for the rest of the population. Based on taste of the water levels of sodium should be below 30 to 60 mg/L based on individual taste. Water softeners ten to cost around $4,500 installed. They are often sold to solve every water quality problem because they have some ability to remove other contaminants. The resin bed used will determine specific contaminant removal. Softened water can have a low pH and high levels of chloride, corrosion control problems and softening systems can encourage the growth of reducing bacteria. Water softening systems add sodium. Reverse osmosis systems and distillation systems remove sodium and are safe for household use, but addressing hard water by using vinegar to descale pots and dishwashers, regularly draining hot water heaters, and using detergents formulated for hard water might be a better solution for you if your water like mine is only modestly hard.

For the second time this year we found a well that had arsenic exceeding the EPA MCL for drinking water of 10 ppm. While arsenic is a naturally occurring element found in soil and groundwater it is not typically found at significantly elevated levels in Prince William County. Arsenic can also be an indication of industrial or pesticide contamination and further testing should be done. Arsenic can be very tricky to remove depending on its form and the other contaminants present. Possible solutions for elevated levels of naturally occurring arsenic are reverse osmosis system, iron oxide filter system, or maybe a water softening system.

Keeping an Eye on Drought

from Drought Monitor May 2, 2017

Last year was a dry year. By last fall, the beginning of the water year almost 85% of Virginia was experiencing abnormally dry conditions. There was very little snow around here this winter. Spring continued to deliver less rain than normal in the region and large areas of moderate drought began to build in north and central Virginia covering most of Fairfax, Loudoun, Prince William and Fauquier Counties. The rain and snow are essential. The good news is that spring rains have been falling, since the date of the drought report data (last Tuesday) it rained 1.5 inches as measured a my rain gauge.

Rainfall and snow melt are the water that flows to the rivers and streams of our region ultimately feeding the Potomac River, Occoquan Reservoir and Lake Manassas, but also percolates into the ground and recharges the groundwater that serves private drinking water wells and community wells that draw their water supply from groundwater and contributes to streams; some of the water flowing in rivers comes from seepage of groundwater into the streambed. Groundwater supplies a significant portion of Prince William, Loudoun Counties and almost all of Fauquier County with drinking water, in addition Virginia is still a very rural state that needs the rain for agriculture.

The water level in a groundwater well usually fluctuates naturally during the year. Groundwater levels tend to be highest in the early spring in response to winter snowmelt and spring rainfall when the groundwater is recharged. Groundwater levels begin to fall in May and typically continue to decline during summer as plants and trees use the available shallow groundwater to grow and streamflow draws water. Natural groundwater levels usually reach their lowest point in late September or October when fall rains begins to recharge the groundwater again. The natural fluctuations of groundwater levels are most pronounced in shallower wells and those in fractured rock systems that are most susceptible to drought.

Unless there is an earthquake or other geological event groundwater changes are not abrupt and problems with water supply tend to happen slowly as demand increases with population growth and recharge is impacted by adding paved roads, driveways, houses and other impervious surfaces. Slowly, over time groundwater levels respond to these changes. The U. S. Geological Survey (USGS) collects real time groundwater monitoring data from over 160 groundwater wells in Virginia. Many measure groundwater conditions daily and can be viewed online. The USGS Water Resources system has undergoing a transition to a new data management system that allows you to play with the data and highlights provisional data.

One of the Virginia wells, 49V1 is just up the road from me in the same groundwater basin and serves as the proxy of the condition of my well. The time span that I have been tracking the well data is somewhat short, but it does appear that there is a slight downward trend despite the data beginning at the end of a drought. This is a sign that the present groundwater use may not be sustainable. No studies have been done that attempt to quantify what the total available water is within the county or what the current demand is, so it’s hard to know how significant this is. The nine years of data do clearly show the natural annual fluctuation of the water level within a groundwater well which is cool to see.

Lead in Drinking Water

Lead in drinking water is a national problem. Flint Michigan was not an aberration nor was it the worst incidence of lead in drinking water supplies, but rather some combination of determined population, blatant misrepresentation by public officials, the public sentiment combined with the good luck of engaging Professor Marc Edwards of our own Virginia Tech allowed Flint to become the poster child for lead in drinking water that Washington DC failed to become ten years earlier. In a recent examination of data, Reuters found 3,000 communities that had recently recorded lead levels at least double those in Flint during the peak of that city’s contamination crisis.

Elevated lead blood levels in children can come from more than water- lead based paint in older homes is a particularly notable source, we have made great progress on reducing exposure to lead based paint. The lead in drinking water is predominately coming from the pipes. Lead does not exist in in most groundwater, rivers and lakes- the source water for most municipal and private water supplies. Instead, lead in drinking water is picked up from the pipes on its journey into a home. In older homes the water service lines delivering water from the water main in the street into each home were commonly made of lead. This practice began to fade by the 1950’s but was legal until 1988. Lead was also used to solder copper pipes together before 1988 (when the 1986 ban on lead in paint and solder went into effect). Also until very recently (2011 Reduction of Lead in Drinking Water Act) almost all drinking water fixtures were made from brass containing up to 8% lead, even if they carry a plated veneer of chrome, nickel or brushed aluminum and were sold as "lead-free." So even homes built with PVC piping in the 2000’s may have some lead in most of the faucets.

The presence of lead in pipes and fixtures becomes a bigger problem the older the pipes and fixture become. Over time older pipes and fixtures corrode or simply wear away and the lead and other corrosion material (like rust) is carried to the drinking water. Time and water do cause corrosion, but this can be aggravated by the pH of the water or other changes in water chemistry. The amount of lead corroded from metal plumbing generally increases as water corrosiveness, a factor of the water’s acidity and calcium carbonate content, increases. In general, acidic water that has a pH less than 7 and is low in calcium carbonate is more corrosive than water that has a pH higher than 7 and that is high in calcium carbonate. Soft water tends to be more corrosive than hard water, and warm water is more corrosive than cold water. The common practice of grounding electrical connections to water pipes also can increase lead corrosion in the pipes.

There are about 75 million homes across the country built before 1980, meaning they’re most likely to contain some lead plumbing, though homes built until recently can contain some lead containing plumbing fixtures. That's more than half of the country’s housing units, according to the Census Bureau. The heaviest concentrations are in New York, Rhode Island, Massachusetts, Connecticut and Pennsylvania. In addition, there are an estimated 7.3 million homes connected to their utility's water mains by individual lead service lines. These homes and buildings are mostly in older cities. These lead service lines are owned in part or whole by the property owner and should have been replaced decades ago.

You cannot taste or smell lead. The only way you can know if there is lead in your water is to test. The U.S. EPA determines that a system has exceeded the lead standard when more than 10% of samples taken show lead levels above 15 parts per billion. It's called an "action level" because, at that level, water systems are required to take some action to reduce contamination. The problem is very few samples are required to be taken each year a water system and there is no safe level of lead. 

 U.S.EPA rules require lead (and copper) to be measured inside a home usually at the kitchen sink. In small community water systems, five to 10 homes are sampled initially every six months. The frequency of sample collection is reduced to annually and subsequently to three years based upon consistently meeting the action limit. That is not nearly exhaustive testing and community systems and schools have limited staff and resources to address these issues. There are 2,724 listed public water supply systems that are required to test their water in Virginia alone. Many of them are parks and entertainment venues, schools and tiny community systems on well water. All have limited resources. A problem could go on for years or a decade before it was discovered. Test your home water. Some large community water systems like Fairfax Water will do the analysis for you. In other places you are on your own.

Underwater Grasses Help Restore the Bay

The underwater grass survey has been conducted in the Chesapeake Bay since 1984. That yearn just 38,229 acres of underwater grass were found. The 2016 underwater grass survey found 97,433 acres. This represented 53% of the Chesapeake Bay TMDL goal of 185,000 acres, and it exceeded an interim target of 90,000 acres set for 2017 under TMDL interim targets. The Bay’s 185,000-acre goal is based on actual acreages that could be observed in historical photographs of the Bay.

Restoring underwater grass beds is one of the goals of the nutrient and sediment reductions aimed at cleaning up the Bay, submerged grasses need sunlight to survive, and the clearer the water, the more sun they get. The grasses die as water is clouded by sediment and nutrient-fueled algae blooms. Underwater grass beds are a critical component of the Bay ecosystem. In addition to providing food for waterfowl and shelter for fish and crabs, they also pump oxygen into the water and trap sediments.

The recovery of the Chesapeake Bay’s underwater grasses has not been a straight line. Underwater grasses are impacted by storms and weather. The underwater grasses were knocked back to 48,195 acres by Hurricane Irene and Tropical Storm Lee in 2011, which sent a flood of nutrients and sediment into the Chesapeake.

Dry weather can also impact underwater grasses. Dry weather reduces the flow of nutrients and sediments into the Bay that can help the underwater grasses recover. However much of the recovery is in the moderate-salinity areas of the Mid Bay, a region dominated by widgeon grass, which is a notorious “boom and bust” species that can disappear as rapidly as it pops up. More than half of all underwater grasses in the Bay are found in that area.

Low flow, also increases the saltwater intrusion into the bay. Observations in some areas of the oligohaline (areas of moderate salinity) found a decline was in hydrilla, a nonnative species that is often quick to colonize but is also sensitive to higher salinities. Drier conditions (and therefore higher salinity) in some rivers might have caused localized diebacks. The very salty, polyhaline waters in the Lower Chesapeake Bay from the mouth of the Rappahannock and Tangier Island south, including the lower York and James rivers was observed to have only 14,226 acres of underwater grasses, which was a 15 % decrease.

Though this was a good year for underwater grasses, they are not yet robust and might not survive a large storm event. You and your group can help plant underwater grasses each year by participating in CBF's Grasses for the Masses program. During the winter months the Chesapeake Bay Foundation (CBF) conducts workshops where participants are given instructions and the tools necessary to grow the underwater grasses themselves. Then after about 12 weeks in the spring the groups can plant the grasses. Plantings are done at restoration sites during the months of April and May. Participants attend one of the grass plantings with CBF staff and other growers.

Planting underwater grass is an activity that requires a state permit. CBF maintains a permit for two planting sites and it is important that the grasses produced through the Grasses for the Masses program are planted only in these designated areas. In Northern Virginia the planting area is in Mason Neck State Park in Lorton. The 2017 Grasses for the Masses program was funded by the Chesapeake Bay Restoration Fund, using funds generated from the sale of Chesapeake Bay license plates. Most of the planting has been completed for the season. However, on June 5, 2017, in celebration of World Environment Day, the State Department with the help of the Chesapeake Bay Foundation will be planting their crop of underwater grasses at Mason Neck State Park in Lorton, Virginia.

Fauquier’s Water Troubles

Fauquier County depends almost entirely on groundwater drawn from fractured bedrock aquifers for drinking and irrigation water. Currently, the county uses 3.9 million gallons of water a day for public supply and domestic use. The availability of groundwater is dependent upon subsurface geologic conditions which are not uniform throughout the County. Fauquier County includes parts of the Blue Ridge, the Culpeper Basin, and the Piedmont geological province. A key factor isn’t just how much water you’re pumping out of the ground, but rather where in the watershed and in what geologic province you are pumping. Different locations within the county have different water availability. The County can’t change the underlying geology or control the rate or pattern of groundwater recharge. Instead Fauquier must yield to nature.

Sustainability and availability of groundwater resources in Fauquier County is a concern for water managers and planners. As their comprehensive plan calls for development that will increase population 140% limitations of the water supply have already created problems. Suburban development has increased water-supply demands, added impervious surfaces that may have reduced groundwater recharge, and possibly caused transfers of water between basins through water distribution and sewer systems. When the county designed and built the service areas for the various communities natural watershed and water availability was not considered. At the time little wa know about the groundwater hydrology of the area.

Water availability is of particular concern in Marshall, where the Fauquier Water and Sanitation Authority (FCWSA) reported a 40 to 60 foot drop in the water levels over the past four years. Diminished water supply has left the town with inadequate water pressure despite lowering equipment and adjusting the pumping schedules. Some of the Service Districts within the County are potentially threatened by either the presence of land uses that could, or have, adversely impact groundwater quality and/or are within areas where current or future groundwater withdrawals may exceed recharge rates. According to Jamie Emery, Emery & Garrett Groundwater Investigations of the 42 inches of annual rainfall in the County, only about 6 to 10 inches contribute to groundwater recharge.

FCWSA and Fauquier County have invested more than$100 million in wells and water infrastructure throughout the county. These investments include: pump stations, pipelines, water tanks, treatment systems and more. Yet with all this money spent there has been no money spent on protecting the wells and their recharge zones. The County has not even defined the groundwater recharge areas for its existing wells. Chemical spills or leaks from fuel storage tanks can go unnoticed until they contaminate public water sources. Changes in land use can adversely impact groundwater quality. Yet the County does not have land use policies that protect and preserve its critical groundwater resources.

Unfortunately, Service Districts are not neatly overlain over the best portions of a watershed drainage area because that wasn’t the key factor in deciding the original location of those districts. In 2014 Fauquier County held a “Water Summit.” It was determined that despite a cost of about half a million dollars, Fauquier needed a study of the groundwater resources in the county. A detailed study designed by the U.S. Geological Survey (USGS) and spearheaded by the USGS and Virginia Department of Environmental Quality (DEQ) would address most of the issues and challenges to moving forward in the development of the County’s water supply and the professional management of its water resources. The County determined that there are many efficiency, cost-saving, strategic, professional, and long-term benefits to gaining a broad understanding of Fauquier County’s groundwater resources. There are also short-to-mid-term, practical and applied benefits as well.

With the implementation of the study that is to be completed at the end of the second quarter in 2021, Fauquier begins down the road to sustainable groundwater use. Honestly if the public water supply had not been dependent on groundwater the private wells in the county would have been long dry before sustainable groundwater and land use, zoning and overlay districts were managed in an informed way.