Mount Desert Water Dist -Seal, ME
Exceeded the action level in the past
Latest 90th-percentile lead: 2.77 ppb (monitoring period 2024-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Mount Desert Water Dist -Seal at a glance
Mount Desert Water Dist -Seal serves about 865 people through 346 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 Hancock County, Maine. EPA system ID: ME0091420; phone on file: 207-276-3733. 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 2023 (2.17 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mount Desert Water Dist -Seal is 105 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.77 ppb |
| 2023 | 2.17 ppb |
| 2020 | 1.13 ppb |
| 2019 | 5.25 ppb |
| 2018 | 2.59 ppb |
| 2017 | 2.55 ppb |
| 2017 | 5.64 ppb |
| 2016 | 105 ppb over 15 |
How Mount Desert Water Dist -Seal 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. Mount Desert Water Dist -Seal's 2.77 ppb sits at the 71st percentile in Maine and the 79th nationally (higher means more lead).
Nearby utilities
29 other systems share Hancock County; 11 of them have a higher latest lead result than Mount Desert Water Dist -Seal. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Town Of Bar Harbor- Water Division | 4,443 | 3.4 ppb |
| Ellsworth Water Department | 3,910 | 4 ppb |
| Southwest Harbor Water & Sewer District | 2,480 | 2.1 ppb |
| Maine Water Company Bucksport Division | 1,700 | 2 ppb |
| Mount Desert Water Dist North | 1,623 | 2.48 ppb |
| Castine Water Department | 983 | 0 (not detected) |
| Winter Harbor Water District | 700 | 1.4 ppb |
| Stonington Water Company | 683 | 1.3 ppb |
| Franklin Water Department | 420 | 3.6 ppb |
| Long Pond Water District | 308 | 4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Northeast Harbor, 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 Mount Desert Water Dist -Seal 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Why an old exceedance still matters: over the limit before, under it now.