What was found in Mount Desert's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 348 µg/L 27% of the EPA limit 1300 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019
Highest in the city: 386 µg/L — MOUNT DESERT WATER DIST -SEAL · 865 people · 2019 | 2/2 | SYR4 |
| Fluoride | 120 µg/L 3% of the EPA limit 4000 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 52.5 µg/L 88% of the EPA limit 60 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019 | 2/2 | SYR4 |
| TTHM | 46 µg/L 57% of the EPA limit 80 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019
Highest in the city: 49 µg/L — MOUNT DESERT WATER DIST -SEAL · 865 people · 2019 | 2/2 | SYR4 |
| Nitrate | 20 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019
Highest in the city: 40 µg/L — MOUNT DESERT WATER DIST -SEAL · 865 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 20 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2013
Highest in the city: 40 µg/L — MOUNT DESERT WATER DIST -SEAL · 865 people · 2013 | 2/2 | SYR4 |
| Lead | 21.95 µg/L 146% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019
Highest in the city: 22.94 µg/L — MOUNT DESERT WATER DIST -SEAL · 865 people · 2019 | 2/2 | SYR4 |
| Barium | 3.585 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019 | 2/2 | SYR4 |
| Bromate | 1.54 µg/L 15% of the EPA limit 10 µg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2019
Highest in the city: 2.575 µg/L — MOUNT DESERT WATER DIST -SEAL · 865 people · 2019 | 2/2 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Highest in the city: MOUNT DESERT WATER DIST -SEAL · 865 people · 2019 | 1/2 | SYR4 |
| Chloroform | 1.2 µg/L No EPA limit set Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2014 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.7000 pCi/L 14% of the EPA limit 5 pCi/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2012
Highest in the city: 0.8000 pCi/L — MOUNT DESERT WATER DIST -SEAL · 865 people · 2012 | 2/2 | SYR4 |
| Lead | 0.0025 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: MOUNT DESERT WATER DIST NORTH · 1,623 people · 2025 | 2/2 | LCR |
Water suppliers serving Mount Desert
| Supplier | Population served |
|---|---|
| MOUNT DESERT WATER DIST NORTH | 1,623 |
| MOUNT DESERT WATER DIST -SEAL | 865 |
Frequently asked questions about Mount Desert tap water
Is Mount Desert tap water safe to drink?
EPA testing detected 13 contaminants in the water serving Mount Desert. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Mount Desert?
2 public water suppliers report drinking-water monitoring for Mount Desert, Maine to the EPA. Each is listed above with its population served.
What contaminants are in Mount Desert's water?
The contaminants EPA monitoring detected in Mount Desert include Copper, Fluoride, Total Haloacetic Acids (HAA5), TTHM, Nitrate. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.