Challenges to Water Resilience in Prince William County

 

Changes to the comprehensive plan, the increased rate of construction, changing climate and land use conspire to undermine the resiliency of our water system in Prince William County and the greater Washington DC metropolitan area.

Global Water Bankruptcy: A Warning

In January 2026, the United Nations University's Institute for Water, Environment and Health (UNU-INWEH) released its "Global Water Bankruptcy" report. The report warns that certain regions have moved past temporary water stress and entered irreversible water bankruptcy, meaning a permanent inability to return to former water levels the exact opposite to water resiliency. Humanity is depleting its water savings—groundwater, lakes, ecosystems, and glaciers—but can no longer rely solely on annual precipitation to supply its communities. Are we in the Washington Metropolitan Area headed for the same fate?

First What is a Resilient Water Supply

In general, a resilient water supply is the ability of a water system—including its infrastructure, management, and natural source water—to withstand, adapt to, and quickly recover from shocks and stresses. Sustainability a related concept focuses on meeting current needs without compromising future generations, "resilience" specifically targets the capability to handle disruptions like the recent big freeze, droughts and intense storms. 

Core Dimensions of Water Resilience

The key pillars of water Resilience:

• Robustness: The physical strength of the system to resist damage. This is the "hardened" infrastructure like pipes and pumps that resist soil shifts and weather related breaks and treatment plants that can operate during extreme weather conditions and floods.
• Redundancy: Having "spare capacity" or back-up systems. For example, if a primary river source is contaminated, a resilient system can instantly pivot to stored reservoir water or secondary interconnections with a neighboring utility. The Potomac River supplies most of the drinking water supply in this region. If there is a spill, Fairfax Water can turn to the Occoquan Reservoir, but a long duration need, like a severe drought might not be able to be met.
• Adaptability: The capacity of the organization to adjust operations as conditions change. This involves using real-time data to manage demand or modifying treatment processes to handle new contaminants.
• Rapidity: The speed at which a system returns to normal service after a failure, often supported by mutual aid agreements and emergency power sources.

 Typical Shocks and Stresses

A resilient system is designed to navigate both sudden "shocks" and long-term "stresses": 

• Sudden Shocks: Hurricanes, earthquakes, cyberattacks, chemical spills, intense cold snaps, and the sudden main breaks which are associated with sudden cold snaps. The resilience of our neighbors at WSSC and DC Water during the recent big freeze was lacking.
• Chronic Stresses: Prolonged droughts, aging infrastructure, rapid population or demand growth, and shifting climate patterns. 

The Role of Natural Infrastructure

Modern definitions of resilience increasingly include Ecological Resilience. This refers to the ability of watersheds, wetlands, and forests to naturally filter pollutants and slow down stormwater runoff, protecting the "built" infrastructure from being overwhelmed during extreme weather which is increasing. 

Prince William County maintains a modestly resilient water system through a combination of diverse water sourcing, regional interconnections, and significant infrastructure investments managed primarily by Prince William Water. However, about 10% of the population are not customer of PW Water.

1. Diversified Water Sources 

The county utilizes four distinct sources to ensure a steady supply: 

• Potomac River: Primary source for the western part of the county treated by Fairfax Water at their Corbalis Plant.
• Occoquan Reservoir: This is a sole source for the eastern part of the county. PW Water is completing a project to build a second connector to the Griffith Plant.
• Lake Manassas: Supplements the western part of the county with water treated by City of Manassas Water and could provide supply for a period of time if the connector to the Corbalis water treatment plant was disrupted.
• Groundwater Wells: Six public wells serve the Bull Run Mountain and Evergreen system. This is a single source community dependent on groundwater wells in a small geographic location. 

Source Water resilience

Let’s go back and look at what has been happening in Prince William County to impact the availability of water and water resilience.

In Prince William County  the conversion of open and forested lands into developed surfaces poses several direct threats to water resilience and sustainability, including increased pollutant runoff and degraded groundwater recharge.

Primary Threats from Land Use Change

• Increasing Impervious Surface prevents rainwater from soaking into the ground. And increasing stormwater runoff and flash flooding .
• Increased Pollutant Loading without natural filtering sediment, nitrogen, phosphorus, and heavy metals flow directly into rivers and the Occoquan.
• Reducing groundwater recharge and the availability of groundwater. 

Fairfax Water recommended that the Prince William Board of Supervisors strengthen riparian buffer protections by establishing an Environmental Resource Overlay District, requiring a 50-foot buffer of woodland for non-Resource Protection Area streams. For industrial development, they advised mandating 200-foot buffers, retaining existing forested areas instead of replanting, and utilizing permanent protective easements. Fairfax Water also called for prohibiting the discharge of high-salinity "blowdown" water into the system. 

In December 2022, the Prince William Board of County Supervisors approved the "Pathway to 2040" Comprehensive Plan, which resulted in the Removal of Sewer and Density Restrictions, allowing for more widespread development infrastructure and higher density.  New Land Use Designations effectively "upzones" sensitive areas.

Though they Occoquan Reservoir Protection Area (ORPA), but recent BOCS decisions have upzoned several areas of open land justifying the decision with the new existence of marvelously magical building techniques.

Industrial and Data Center Expansion including the Digital Gateway and a new industrial area along Route 28 near the Fauquier County line, further converting open land to intensive use. 

Emerging Water Supply Strains

New research from the Interstate Commission on the Potomac River Basin (ICPRB) highlights that changing weather patterns and increased water demand from data centers are straining the region’s water supply.

The 2025 Washington Metropolitan Area Water Supply Study - Demand and Resource Availability Forecast for the Year 2050 finds that while the region will generally have ample water, the risk of shortages is increasing—from about 1 percent in 2030 to 5 percent in 2050 even accounting for all  planned water storage increases in the period. Loss of groundwater is not factored into their model. ICPRB forecasts a 17% increase in water use by 2050, from 465 million gallons per day (MGD) to about 538 MGD.

Climate Change and Water Demand

Increasing water demand and predicted changes in temperature and precipitation—characterized as “hot drought”—may threaten river flow. Rising temperatures decrease river flows through higher evaporation, while increased precipitation could raise flows. The interplay between these factors, land use change reducing groundwater recharge combined with higher demand, puts the source water system at higher risk.

Water Supply Sources and Risks

While most regions have multiple water sources, the Potomac River is the sole drinking water source for Washington D.C. and Arlington County. Fairfax Water uses the Potomac River and the Occoquan Reservoir. Upstream reservoirs (Jennings Randolph and Little Seneca) can supplement Potomac River flow. However, the study found that, in extreme droughts, upstream reservoirs could run dry as early as 2030 in four out of nine scenarios, suggesting a need for additional storage.

 

Iran-Will Water Decide the War

In the Middle East Iran is uniquely blessed with a relative abundance of natural water. The Persian Empire thrived due to the abundance of water. Currently, Iran’s annually renewable water resources are estimated at approximately 80 to 110 billion cubic meters (BCM) depending on whether you ask government sources or hydrologists. Long-term averages and internal estimates vary due to the severe and extended current drought, politics and climatic shifts. Renewable resources were 140 BCM in 1999 and have fallen to current levels, a decline of around 30%  in 25 years. 

According to a recent U.N. report, Iran is experiencing "water bankruptcy," a state where societal water demand permanently exceeds sustainable supply. While the average national renewable resource is approximately 89–110 billion cubic meters (BCM) at best, withdrawals frequently exceed the water supply total, leading to the collapse of regional ecosystems. As discussed in an earlier post, approximately 97% of Iran is experiencing severe drought. Over-extraction of groundwater has led to "aquifer death" and land subsidence in major cities. 

Water scarcity is has been fueling local tensions and protests, which could escalate into broader social conflict, especially as the current war is added to rising inflation, unemployment, housing issues, and the high cost of living further erode people’s capacity to cope with yet one more crisis. The protests of early winter met with government crackdowns and reportedly over thirty-thousand  Iranians were killed by their government in recent protests. In addition, over 53,000 people have been arbitrarily detained. 

The "loss" of nearly 30% of Iran's renewable water over the last quarter century is driven by increased evapotranspiration and the reduction in mountain snow pack; and cross border conflicts with Turkey and Afghistan caused by damming the rivers. This past fall Iran had to resort to water rationing (though sometimes indirect by cutting off supply).

Saudi Arabia and Iran represent opposite ends of the spectrum in water management. Saudi Arabia leads the world in desalination capacity and investment in water infrastructure while Iran faces a water crisis that threatens their very existence due to systemic underfunding and mismanagement. Recent official Saudi Arabia data and industry reports indicate that Saudi Arabia’s  installed desalinization capacity has exceeded 9 million m³/day. This is a result of a long term strategic plan involving over $80 billion in investment in water.

While Saudi Arabia has "solved" its scarcity through technology, it faces a security risk: a successful strike on the Jubail desalination plant could trigger a humanitarian crisis in Riyadh within one week. Conversely, Iran's crisis is systemic and environmental, driven by the irreversible depletion of its ancient groundwater reserves and destruction of its ecology while not maintaining or improving their water infrastructure.

The Gulf Cooperation Council states are uniquely exposed to Iran's attacks because they rely on desalination for 70% to 90% of their drinking water. Analysts of the region believe Tehran is targeting these "soft" civilian targets to raise the humanitarian and economic costs for Arab states. Unconfirmed reports from the Economist suggest Iran has also targeted a major desalination plant in Israel which serves as a backbone for the nation’s potable water supply. Beyond water, Iran has successfully halted a fifth of the global LNG (liquified natural gas) supply by striking Qatar’s Ras Laffan energy facility. 

Iran has long threatened to retaliate against any attack with an attack on a  wide range of regional and international targets . They have followed through with that. Following  the U.S. and Israeli strikes on February 28, Iran launched missile and drone attacks on industrial areas, ports, water and power infrastructure and tankers in Saudi Arabia, the UAE (including Dubai and Abu Dhabi), Bahrain, and Qatar.

Iran has taken the fight to the next level.  Iran has implemented it’s "Decentralized Mosaic Defense." This strategy uses dispersed, mobile missile launchers and clandestine drone sites to continue to keep their dispersed units and terrorist cells fighting. However, the ability to maintain  control of the population or have a unified strategy could be impaired. Operating a critically failing water system may be beyond the thought or reach of the Mosaic Strategy. 

Tehran's reservoirs are at somewhere around 10% capacity. The Mosaic Defense's focus on "prolonging conflict" and "attrition" will divert the resources needed for urgent water infrastructure repairs. This is likely to accelerate the collapse of complex public services rather than maintaining them. Loss of water might change the balance of power in Iran.

Proactively Replace Heat Pump or Wait for Failure

In late January 2026, Virginia experienced an unusually severe storm. The region was hit by heavy snow, followed by sleet and freezing rain, and then a prolonged deep freeze. This rare combination formed a rock-hard, ice-bonded layer officials called "snowcrete," which behaved much like solid ice or concrete. Only recently has that icy mess melted away.

Personal Experiences During the Storm

Two noteworthy events occurred during the storm. First, I welcomed a local stray cat into my garage. By placing the old cat’s RSID tag on her collar, I taught her how to use the cat door. She quickly adapted, and by the time the storm arrived, she was settled with a heated bed, food, and water. Her presence was a pleasant distraction during the days spent snowed in.

Second, several neighbors experienced heat pump failures, and one dealt with a burst water pipe. These incidents made me consider whether I should proactively replace my 2012 heat pump, even though it is still operational, rather than risk an emergency replacement during extreme weather. For the past week, I have weighed the pros and cons of replacing my Carrier Infinity system in spring 2026.

Considerations for Replacement

Under the American Innovation and Manufacturing (AIM) Act of 2020, the HVAC industry is transitioning away from high Global Warming Potential (GWP) hydrofluorocarbons like R-410A in my existing system, moving toward more eco-friendly refrigerants. Signed into law in 2020 by President Trump during his first administration, the AIM Act remains in effect unless repealed by Congress, and despite some proposed deadline delays, the shift is ongoing. In 2026, the industry standard is the adoption of A2L refrigerants like R-454B or R-32, which are slightly "flammable."

Safety and Flammability of R-454B

R-454B is classified as A2L (mildly flammable), meaning it is difficult to ignite and has a very low burning velocity. Ignition requires a high concentration and a consistent, open flame, making it less risky than propane tanks or gas stoves, though it is more hazardous than previous refrigerants.

Modern heat pumps now feature a Refrigerant Detection System (RDS). If a leak occurs, the system automatically activates the blower fan to disperse the gas, preventing it from reaching flammable concentrations, and then shuts down. In the rare event of a fire, R-454B tends to burn slowly and often self-extinguishes.

Newer heat pump units have more complex electronics and controllers, increasing the potential for component failures. Therefore, a comprehensive parts and labor warranty from a reliable manufacturer is essential; though I have never bought an extend warranty before. Transitioning to a new system means moving away from a known entity into something less familiar.

My 2012 heat pump has reached its statistical life expectancy. By upgrading now, I can avoid an emergency replacement where inventory may be limited, or I might have to endure days without heating or cooling during extreme weather. In 2012, I spent several weeks without air conditioning upstairs during a heat wave.

Pros of Proactive Replacement

Pros of Proactive Replacement

1. Avoid Emergency Stress and Costs: The primary benefit is complete control over the process. You can research models, get multiple quotes, schedule the installation at your convenience, and avoid the panic, limited choices, and premium pricing of an emergency summer failure replacement.
2. Future-Proofing with New Technology:

• Regulatory Compliance: I would transition from a soon-to-be "legacy" R-410A system to a modern R-454B system that complies with all 2026 EPA regulations, ensuring easy servicing and affordable refrigerant supply for the next 15+ years.

• Superior Efficiency: My 2012 unit was 19 SEER under the old testing standards. New models (like the 23 SEER2 Carrier Infinity models I am considering) are rated under “real life conditions” and utilize improved thermodynamics and variable-speed technology, likely reducing your operating costs by close to 10%.

3. Better Warranty Coverage: New equipment comes with full manufacturer warranties on parts and compressors for 10 years and lets be honest systems tend to be problem free in the first 8 years or so. My 2012 system is past its original warranty, and the pump is not operating as efficiently as it once was. Also, because of all the electronics, factory distributors are offering 10 year labor warranties at what appears to be at reasonable prices given the cost to install a major component or add refrigerant.
4. Access to Financial Incentives: New, high-efficiency heat pumps often qualify for substantial federal tax credits (potentially up to $2,000 via the Inflation Reduction Act) and local utility rebates, however, none of those incentives are available to me.

Cons of Proactive Replacement

1. Upfront Financial Cost: The main drawback is the immediate expense of a new premium system—a significant investment that might not be necessary for another year or two if the current unit continues to function.
2. "Wasted Life" Concern: Replacing the current heat pump early means not maximizing every hour of usage from the original investment, as it still has some useful life remaining.
3. Potential for New System "Bugs": While A2L technology has been thoroughly tested, any new installation carries a small risk of initial issues or manufacturing defects, which can be inconvenient. Additionally, the increased complexity of controllers complicates the systems further making failure of a controller a consideration.
4. Learning Curve: The new smart Infinity controls and A2L safety features require a slight learning curve for both the user and the installer. It is important to ensure the installer is a factory-authorized dealer with experience installing these units.

Conclusion

The bottom line is I’m old and not going to get any younger. Making this as easy as possible is valuable to me. Replacing a heat pump is always highly inconvenient and will require repair and repainting of the ceiling in my closet because the attic stairs have to be removed to fit the unit through to the attic where the air handler goes. In addition, the new electronic thermostat and control is not the same size as the old one and will require the repair and repainting of that wall. So, this will be a big dusty mess, a call to the handy man for repair and painting. This is never going to get easier. Nonetheless, I have come to the conclusion that seeking peace of mind and long-term efficiency gains, the pros of avoiding an emergency replacement in the peak of summer typically outweigh the cons of replacing a perfectly functional (but aging) unit. So, I’ll get a couple of bids and move forward with replacement this spring.

Well Water Testing Clinic

 

Public water supplies are tested daily for contaminants.  Private wells are tested when you do it, and you should do it every year. Prince William County Extension will be having a test your well water clinic in March 2026.  Sign up now online : tinyurl.com/VAHWQP-PW

Water samples will be tested for 28 chemical and bacteriological constituents including: iron, manganese, nitrate, lead, arsenic, fluoride, sulfate, pH, total dissolved solids, hardness, sodium, copper, total coliform bacteria and E. Coli bacteria. Sample kits will be $70  this year. Registration and pre-payment must be online by going to https://tinyurl.com/VCE-PW-VAHWQP before March 16th 2026. I had no trouble following the link and prepaying. Be aware they will send a receipt and confirmation of registration from the VCEPrograms  and a payment receipt from the Bursar at VA Tech.

You have to go pickup your sample kit before the sampling date and take the sample according to the directions provided on the morning you will be dropping it off at the Extension office. Instructions on how to collect the sample are also availableon-line

• Watch a video on how to collect your sample on YouTube
• Read instructions on how to collect your sample online

1. Pick up your Testing Kit Materials at any of the options below:        

March 16-31, 2026 8 AM -3 PM at the VCE-Prince William Office; 8033 Ashton Ave, Manassas, VA 20109

The Plaza, 1 County Complex Ct, Woodbridge, VA 22192 : Saturday, March 21st 2026 9:00am - 11:00am.

Prince William Library in Haymarket/Gainesville; 14870 Lightner Road, Haymarket, VA 20169 Monday, March 23, 2026 5:30-7:30 PM

2. The Sample Drop Off: Wednesday, April 1, 2026 from 6:00am - 10:00am ONLY at the VCE-PW Office, 8033 Ashton Ave., Suite 105, Manassas 20109.

3. Results will be sent to you by email and there will be an Interpretation Meeting  both in person and through (Zoom)  on May 12, 2026 6:30PM-7:30PM  5 County Court, County Center, VA 22192. Zoom link and details will be emailed to all registrants.

The number of kits is limited. Pre-payment online is the only way to pay and guarantee you will get a kit. You must pay and register in advance. No refunds will be available. Household water quality is driven by geology, well construction and condition, nearby sources of groundwater contamination, and any water treatment devices and the condition and materials of construction of the household plumbing.

To ensure safe drinking water it is important to maintain your well, test it regularly and understand your system and geology. If you have water treatment equipment in your home you might want to get two test kits to test the water before and after the treatment equipment to make sure you have the right equipment for your water and that it is working properly. All participant information is kept strictly confidential

The chart below shows what was found in the  private wells tested test of testing  in Prince William County in 2025.