Rocky Ridge Subdivision, ME
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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 Rocky Ridge Subdivision
Rocky Ridge Subdivision serves about 64 people through 1 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Penobscot County, Maine. EPA system ID: ME0092791; phone on file: 207-989-2337. 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 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Rocky Ridge Subdivision is 0.7 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0.7 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. Rocky Ridge Subdivision's reported as 0 (not detected) sits at the 11th percentile in Maine and the 5th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Penobscot County
48 other systems share Penobscot County; 41 of them have a higher latest lead result than Rocky Ridge Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bangor Water District | 27,298 | 7.45 ppb |
| Brewer Water Department | 8,860 | 2.1 ppb |
| Old Town Water District | 7,648 | 7.9 ppb |
| Orono-Veazie Water District | 5,793 | 10 ppb |
| Maine Water Company Millinocket Division | 5,400 | 2.8 ppb |
| Hampden Water District | 4,800 | 2.52 ppb |
| Lincoln Water District | 3,020 | 0.96 ppb |
| Dexter Utility District | 2,338 | 4.9 ppb |
| East Millinocket Water Works | 2,133 | 2.8 ppb |
| Newport Water District | 1,900 | 1.3 ppb |
Your move
Look up your address in Rocky Ridge Subdivision'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 Rocky Ridge Subdivision 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. A zero today does not rule out a jump later - the rules are tightening in 2027.