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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Compare water quality across 6 counties in Maine
6 counties ranked by average water quality score
| Rank | County | Avg Score | Grade | Cities | Population | Score Range |
|---|---|---|---|---|---|---|
| 1 | York County | 90 | A | 3 | 64,353 | 86 - 95 |
| 2 | Aroostook County | 89 | A- | 1 | 8,797 | 89 - 89 |
| 3 | Penobscot County | 86 | A- | 1 | 31,753 | 86 - 86 |
| 4 | Androscoggin County | 82 | B+ | 2 | 60,282 | 80 - 84 |
| 5 | Cumberland County | 80 | B+ | 6 | 176,055 | 69 - 87 |
| 6 | Kennebec County | 79 | B | 2 | 34,525 | 73 - 85 |
3 cities • 64,353 residents
1 cities • 8,797 residents
1 cities • 31,753 residents
2 cities • 60,282 residents
6 cities • 176,055 residents
2 cities • 34,525 residents
Our county-level water quality analysis aggregates data from municipal water systems across Maine. Each county's score represents the average water quality across all analyzed cities within that county, weighted by population served.
With 6 counties and 15 cities analyzed, this data helps residents understand regional water quality patterns in Maine. County scores range from 69/100 to 95/100, reflecting the diversity of water sources and treatment infrastructure across the state.
All analyzed counties in Maine maintain average scores above 70, indicating generally acceptable water quality standards statewide. Individual city scores may vary, so residents should still review their specific city's report.