Lead pipes in Connecticut
Connecticut's 476 community water systems reported 7,993 lead and 5,178 galvanized-requiring-replacement service lines, plus 281,068 of unknown material. That ranks #31 among states for confirmed lead lines.
- Lead 1.0%
- Galvanized (replace) 0.6%
- Unknown 34%
- Non-lead 65%
1.6% of the service lines Connecticut utilities reported are lead or galvanized requiring replacement, well below the national share of 3.1%. 34% are still unidentified (national: 21%). The largest counts are in Aquarion-Eastern Fairfield County (4,271), Regional Water Authority (2,224), Aquarion-Greenwich (1,686). 10 systems haven't reported counts yet.
Since 2025 Q1, reported lead and galvanized lines in Connecticut went from 6,478 to 13,171 (up 6,693). See which systems made the most progress.
Systems with confirmed lead lines (71)
No confirmed lead, but unknown lines remain (90)
Showing 50. See all
No lead or unknown lines reported (17)
Systems serving 1,000 or more people. Systems without counts on file are listed as 0.
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Bristol Water DepartmentBristol | 0 | 0 | 0 | 0% |
| Wallingford Water DepartmentNorth Haven | 0 | 0 | 0 | 0% |
| Mohegan Tribal Utility AuthorityUncasville | 0 | 0 | 0 | 0% |
| University of Connecticut - Main CampusMansfield | 0 | 0 | 0 | 0% |
| Mashantucket Pequot Water SystemMashantucket | 0 | 0 | 0 | 0% |
| Kensington Fire DistrictBerlin | 0 | 0 | 0 | 0% |
| Connecticut Valley HospitalMiddletown | 0 | 0 | 0 | 0% |
| Fairfield HillsNewtown | 0 | 0 | 0 | 0% |
| Scwa, Montville Division (MTV)Montville | 0 | 0 | 0 | 0% |
| Scwa, Tower-Ferry View DivisionLedyard | 0 | 0 | 0 | 0% |
| Wolcott Water DepartmentWaterbury | 0 | 0 | 0 | 0% |
| Connecticut Correctional InstituteEnfield | 0 | 0 | 0 | 0% |
| Scwa, North Stonington Division (NST)North Stonington | 0 | 0 | 0 | 0% |
| Scwa, Mohegan DivisionMontville | 0 | 0 | 0 | 0% |
| Candlewood Shores Tax DistrictBrookfield | 0 | 0 | 0 | 0% |
| Montville Water SupplyMontville | 0 | 0 | 0 | 0% |
| Sprague Water & Sewer AuthoritySprague | 0 | 0 | 0 | 0% |
Lead pipes in Connecticut cities
- Bridgeport4,271 lead + galv. lines
- Stamford4,271 lead + galv. lines
- New Haven2,224 lead + galv. lines
- Hartford43 lead + galv. lines
- Waterbury1,080 lead + galv. lines
- Norwalk54 lead + galv. lines
- Danbury1 lead + galv. lines
- New Britain170 lead + galv. lines
- Bristolno lead reported
- Meriden30 lead + galv. lines
- West Haven2,224 lead + galv. lines
- Milford2,224 lead + galv. lines
- Middletown257 lead + galv. lines
- Shelton4,271 lead + galv. lines
- Norwich13 lead + galv. lines
- Torrington126 lead + galv. lines
- Naugatuck17 lead + galv. lines
- New London529 lead + galv. lines
- Ansonia2,224 lead + galv. lines
- Derby2,224 lead + galv. lines
- Groton6 lead + galv. lines
- Danielson93 lead + galv. lines
- Woodmont2,224 lead + galv. lines
- Newtown4,271 lead + galv. lines
- Litchfield33 lead + galv. lines
- Stonington22 lead + galv. lines
Connecticut lead pipe questions
How many lead pipes are in Connecticut?
Connecticut's community water systems reported 7,993 lead service lines and 5,178 galvanized lines that must be replaced, for 13,171 in total. Another 281,068 lines are of unknown material.
Which Connecticut water systems have the most lead pipes?
Aquarion-Eastern Fairfield County (4,271), Regional Water Authority (2,224), Aquarion-Greenwich (1,686). Counts are lead plus galvanized-requiring-replacement lines.
What share of Connecticut service lines are lead?
1.6% of reported service lines in Connecticut are lead or galvanized requiring replacement, well below the national figure of 3.1%. 34% are still unknown, compared with 21% nationally.
How do I find out if my Connecticut home has a lead service line?
Search for your water system or ZIP code above, then open your utility's address-level inventory map. You can also check the pipe where it enters your home with a scratch and magnet test.
Source: EPA SDWIS service line inventory, 2026 Q3. Smaller systems with no lead or unknown lines are omitted. See also national rankings.