Hartford, Connecticut, doesn’t make many water quality headlines — and that’s largely good news. The Metropolitan District Commission (MDC), which provides water to Hartford and seven surrounding towns (about 400,000 people), operates one of the better-protected water supply systems in the Northeast.
MDC’s water comes from a series of reservoirs in the Barkhamsted and West Hartford areas — protected watersheds in the Connecticut highlands that produce clean source water requiring relatively minimal treatment. The system includes West Hartford Reservoirs #1 and #2, Nepaug Reservoir, and Barkhamsted Reservoir.
A Well-Protected Source
MDC’s watershed protection program limits development and public access in the areas surrounding its reservoirs. The result is source water quality that’s consistently good — low turbidity, low contaminant levels, and minimal algal issues compared to reservoirs in more developed or agricultural watersheds.
Treatment includes coagulation, filtration, UV disinfection, and chloramine for residual disinfection. The system has consistently met or exceeded all federal and state drinking water standards.
This doesn’t mean Hartford’s water is perfect — but it starts from a strong foundation.
Lead: New England’s Old Housing Challenge
Hartford’s water quality risk lives in its buildings, not its source water. Connecticut has some of the oldest housing stock in the United States:
- Hartford has significant numbers of homes and apartment buildings constructed in the 1800s and early 1900s
- Lead service lines connect some older properties to water mains
- Lead solder was used in plumbing through 1986
- Brass fixtures with lead content are common in older buildings
MDC uses corrosion control treatment (pH and alkalinity adjustment) to minimize lead leaching. The system has maintained compliance with EPA’s Lead and Copper Rule, but individual older buildings can have elevated lead levels at the tap.
Hartford’s older neighborhoods — including Frog Hollow, Barry Square, Behind the Rocks, and parts of the South End — have high concentrations of pre-war housing where lead plumbing is most likely.
The LCRI mandate requires MDC to inventory all service lines and replace lead lines within 10 years. For a system with Hartford’s building age profile, this is a significant undertaking.
PFAS in Connecticut
Connecticut has been moderately proactive on PFAS. The state Department of Public Health established an action level of 70 parts per trillion for the sum of five PFAS compounds — less protective than some states (Massachusetts set 20 ppt) but more than states that rely solely on federal standards.
With EPA’s 2024 MCLs now in effect (4 ppt each for PFOA and PFOS), Connecticut utilities are testing and evaluating treatment needs.
PFAS sources in the Hartford area include:
- Bradley International Airport — Located in Windsor Locks, about 12 miles north of Hartford, Bradley has used AFFF and has documented PFAS contamination in surrounding groundwater. Some nearby communities have been affected.
- Connecticut Air National Guard bases — Military aviation facilities in the state have AFFF contamination histories.
- Industrial sources — Connecticut’s manufacturing heritage (aerospace, defense, precision manufacturing) includes operations that used PFAS compounds.
MDC’s surface water reservoirs in protected highlands are less directly affected by these localized contamination sources. But communities in the Hartford region that rely on groundwater — particularly near Bradley Airport — face more direct PFAS exposure risk.
Connecticut River: Not a Drinking Water Source (But It Matters)
Hartford sits on the Connecticut River — the longest river in New England — but doesn’t use it as a drinking water source. However, the river’s water quality affects the broader environmental context:
- Combined sewer overflows from Hartford’s aging sewer system discharge into the Connecticut River and Park River during storms
- MDC has been investing in CSO reduction through the Clean Water Project, including the South Hartford Conveyance and Storage Tunnel
- The river’s water quality affects recreational use, fisheries, and downstream communities
What Hartford Residents Should Know
- Your source water is excellent. MDC’s protected reservoirs produce high-quality water. The main risk is in building plumbing.
- Check for lead. Hartford’s old housing stock means lead plumbing is common. Contact MDC to check your service line status. Run cold water before drinking in older buildings.
- Get a water test if you have specific concerns, especially in older multifamily buildings where plumbing age and condition may vary.
- Consider a filter. Even with good source water, a point-of-use filter provides extra protection — especially in older buildings.
- Private well owners in the Hartford area — test regularly. If you’re near Bradley Airport or military installations, include PFAS in your testing.
The Bottom Line
Hartford’s water system benefits from strong source water protection and competent management. The challenges — lead in old buildings, PFAS at military and industrial sites, and aging sewer infrastructure — are real but manageable with continued investment.
Connecticut’s regulatory environment is more engaged than many states, and MDC’s watershed protection approach provides a model for other utilities. The biggest water quality risk for Hartford residents is the lead in their own building’s plumbing — a problem that better treatment can mitigate but only pipe replacement can fully solve.
If you’re concerned about your water quality, a certified water treatment professional can test your water and recommend the right approach for your home or building.