North Haven Water Department, ME
Lead detected, under the action levels
Latest 90th-percentile lead: 0.64 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About North Haven Water Department
North Haven Water Department serves about 740 people through 296 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Knox County, Maine. EPA system ID: ME0091130; phone on file: 207-867-4433. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2024 (0.9 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for North Haven Water Department is 8.8 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.64 ppb |
| 2024 | 0.9 ppb |
| 2024 | 4.5 ppb |
| 2023 | 8.8 ppb |
| 2020 | 3.2 ppb |
| 2019 | 3.5 ppb |
| 2017 | 3.5 ppb |
Against other Maine systems
Of the 358 Maine systems with a lead result, the median latest reading is 1.5 ppb; 2 are over 15 ppb right now and 40 have gone over at some point. North Haven Water Department's 0.64 ppb sits at the 33rd percentile in Maine and the 45th nationally (higher means more lead).
Other water systems in Knox County
15 other systems share Knox County; 8 of them have a higher latest lead result than North Haven Water Department. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Maine Water Company Camden & Rockland | 21,315 | 4.5 ppb |
| Vinalhaven Water District | 1,053 | 1.5 ppb |
| Maine Water Company Warren Division | 815 | 0 (not detected) |
| Tenants Harbor Water District | 378 | 0 (not detected) |
| Port Clyde Water District | 330 | 4.1 ppb |
| Maine Water Company Union Division | 238 | 0.5 ppb |
| Mountainside Mobile Home Park | 130 | 2 ppb |
| Friendship Water Department | 85 | 1.1 ppb |
| Elliott Apartments | 55 | 0 (not detected) |
| Crawford Commons | 50 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; North Haven, ME may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask North Haven Water Department whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1400 ppb (copper action level 1,300 ppb).
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.