Dingley Spring Estates, ME
Lead detected, under the action levels
Latest 90th-percentile lead: 2.8 ppb (monitoring period 2023-2025). 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.
Who runs the water here
Dingley Spring Estates serves about 90 people through 36 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Cumberland County, Maine. EPA system ID: ME0090450; phone on file: 207-232-8522. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 2 ppb from 0.8 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Dingley Spring Estates is 2.8 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.8 ppb |
| 2022 | 0.8 ppb |
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 2.3 ppb |
| 2016 | 0.9 ppb |
| 2016 | 2 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. Dingley Spring Estates's 2.8 ppb sits at the 73rd percentile in Maine and the 80th nationally (higher means more lead).
Other water systems in Cumberland County
28 other systems share Cumberland County; 4 of them have a higher latest lead result than Dingley Spring Estates. 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) |
| Gray Water District | 2,468 | 2.3 ppb |
| 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 |
Next steps for Gorham, ME
Test your own tap with a certified lab first-draw sample; Gorham, 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 Dingley Spring Estates 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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.