Tenants Harbor Water District, ME
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Tenants Harbor Water District
Tenants Harbor Water District serves about 378 people through 151 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Knox County, Maine. EPA system ID: ME0092335; phone on file: 207-294-6940. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Tenants Harbor Water District's lead record
Against the period ending 2021 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Tenants Harbor Water District is 1 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2018 | 1 ppb |
| 2018 | 1 ppb |
| 2016 | 0 (not detected) |
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. Tenants Harbor Water District's reported as 0 (not detected) sits at the 24th percentile in Maine and the 20th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Knox County
15 other systems share Knox County; 10 of them have a higher latest lead result than Tenants Harbor Water District. 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) |
| North Haven Water Department | 740 | 0.64 ppb |
| 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
Look up your address in Tenants Harbor Water District's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Tenants Harbor Water District whether it covers that cost before hiring anyone - many utilities now do.
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. Small systems behave differently: why small systems go over more often.