Maine Water Quality Brief
State: Maine (ME) Grade: F | Score: 57/100 | National Average: 67/100 (Grade: D) Data as of: 2026-04-30 | Brief generated: 2026-04-30
Key Findings
- Maine earned a water quality grade of F with an average score of 57/100 — 10 points below the national average.
- ZipCheckup recorded 1,440 total violations across 485 ZIP codes, including 287 health-based violations.
- The worst ZIP code in the state (04274) scored only 30/100, while the best (04008) scored 83/100 — a gap of 53 points.
Worst 5 ZIP Codes
| ZIP | City | County | Score | Grade | Violations |
|---|---|---|---|---|---|
| 04274 | Poland | Androscoggin | 30/100 | F | 25 |
| 04677 | Sorrento | Hancock | 33/100 | F | 13 |
| 04664 | Sullivan | Hancock | 33/100 | F | 13 |
| 04064 | Old Orchard Beach | York | 35/100 | F | 0 |
| 04046 | Kennebunkport | York | 35/100 | F | 0 |
County Breakdown (Worst 3)
| County | Avg Score | Grade | ZIP Count | Worst ZIP |
|---|---|---|---|---|
| Piscataquis | 51/100 | D | 13 | 04985 (West Forks, 40/100) |
| Lincoln | 51/100 | D | 23 | 04575 (West Boothbay Harbor, 40/100) |
| Hancock | 52/100 | D | 47 | 04677 (Sorrento, 33/100) |
Violation Summary
| Category | Count |
|---|---|
| Total violations | 1,440 |
| Health-based violations | 287 |
| Monitoring/Reporting violations | 1,153 |
| ZIP codes analyzed | 485 |
| Health violations per ZIP (avg) | 0.6 |
Top health-based violation categories:
- Stage 1 DBP Rule (325 violations across 126 ZIP codes)
- Consumer Confidence Report Rule (223 violations across 100 ZIP codes)
- Total Trihalomethanes (TTHM) (61 violations across 44 ZIP codes)
PFAS Contamination Status
- PFAS detected in 15 of 488 ZIP codes analyzed (3%).
- 14 ZIP codes with federal PFAS exceedances.
- State has enacted its own PFAS MCLs (stricter than federal standards).
Comparison to National Average
| Metric | ME | National |
|---|---|---|
| Avg Score | 57/100 | 67/100 |
| Grade | F | D |
| Health violations / ZIP | 0.6 | — |
About This Data
Data: ZipCheckup.com | Sources: EPA SDWIS, FEMA, CDC, Census | License: CC BY 4.0
Press contact: [email protected] General contact: [email protected] State page: https://zipcheckup.com/states/maine/
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