Gray Water District, ME
Lead detected, under the action levels
Latest 90th-percentile lead: 2.3 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.
Gray Water District at a glance
Gray Water District serves about 2,468 people through 987 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 groundwater, in Cumberland County, Maine. EPA system ID: ME0090620; phone on file: 207-657-3500. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2025 (2.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Gray Water District is 4.8 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.3 ppb |
| 2025 | 2.3 ppb |
| 2024 | 2.6 ppb |
| 2021 | 3.3 ppb |
| 2020 | 1.2 ppb |
| 2020 | 1.2 ppb |
| 2019 | 1.4 ppb |
| 2018 | 1.7 ppb |
| 2018 | 2.1 ppb |
| 2016 | 4.8 ppb |
How Gray Water District compares
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. Gray Water District's 2.3 ppb sits at the 67th percentile in Maine and the 76th nationally (higher means more lead).
Neighbouring systems
28 other systems share Cumberland County; 6 of them have a higher latest lead result than Gray Water District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Portland Water District-Greater | 135,068 | 1.5 ppb |
| Brunswick/Topsham Water District | 18,863 | 0 (not detected) |
| Yarmouth Water District | 8,000 | 9.52 ppb |
| Bridgton Water District | 3,660 | 1.8 ppb |
| Maine Water Company Freeport Division | 2,700 | 0 (not detected) |
| South Freeport Water District | 960 | 0 (not detected) |
| Harrison Water District | 863 | 1.1 ppb |
| Friendly Village Of Gorham Mhp | 763 | 0.74 ppb |
| Knights Hill Association | 718 | 2.8 ppb |
| Portland Water District/Steep Falls | 480 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Gray, 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 Gray 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. Systems that went over once often dip back under; here is what that means.