Maine — 1st District
119th Congress · 160 ZIP codes · Avg score 54/100 · Grade D · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Maine's 1st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 04008 | Bowdoinham | 83 | B | 0 |
| 2 | 04547 | Friendship | 83 | B | 1 |
| 3 | 04858 | South Thomaston | 83 | B | 0 |
| 4 | 04864 | Warren | 83 | B | 0 |
| 5 | 04862 | Union | 82 | B | 4 (1 health) |
| 6 | 04853 | North Haven | 80 | B | 4 |
| 7 | 04530 | Bath | 76 | B | 1 |
| 8 | 04855 | Port Clyde | 75 | B | 8 |
| 9 | 04032 | Freeport | 70 | B | 0 |
| 10 | 04038 | Gorham | 70 | B | 1 |
| 11 | 03903 | Eliot | 69 | C | 3 |
| 12 | 04027 | Lebanon | 69 | C | 2 |
| 13 | 04086 | Topsham | 69 | C | 19 |
| 14 | 04342 | Dresden | 69 | C | 2 |
| 15 | 04539 | Bristol | 69 | C | 6 (1 health) |
| 16 | 04543 | Damariscotta | 69 | C | 5 (1 health) |
| 17 | 04861 | Thomaston | 69 | C | 3 (1 health) |
| 18 | 04927 | Clinton | 69 | C | 2 |
| 19 | 04002 | Alfred | 68 | C | 4 |
| 20 | 04039 | Gray | 68 | C | 6 (2 health) |
| 21 | 04042 | Hollis Center | 68 | C | 1 |
| 22 | 04066 | Orrs Island | 68 | C | 4 |
| 23 | 04007 | Biddeford | 66 | C | 1 |
| 24 | 04020 | Cornish | 66 | C | 0 |
| 25 | 04033 | Freeport | 66 | C | 0 |
| 26 | 04034 | Freeport | 66 | C | 0 |
| 27 | 04049 | Limington | 66 | C | 6 |
| 28 | 04363 | Windsor | 66 | C | 0 |
| 29 | 03904 | Kittery | 65 | C | 0 |
| 30 | 03908 | South Berwick | 65 | C | 0 |
| 31 | 04015 | Casco | 65 | C | 1 |
| 32 | 04260 | New Gloucester | 65 | C | 2 |
| 33 | 04040 | Harrison | 64 | C | 4 |
| 34 | 04048 | Limerick | 64 | C | 7 |
| 35 | 04854 | Owls Head | 64 | C | 69 |
| 36 | 04084 | Standish | 63 | C | 6 |
| 37 | 04548 | Georgetown | 63 | C | 0 |
| 38 | 04579 | Woolwich | 63 | C | 0 |
| 39 | 04841 | Rockland | 63 | C | 0 |
| 40 | 04852 | Monhegan | 63 | C | 0 |
| 41 | 04859 | Spruce Head | 63 | C | 0 |
| 42 | 04860 | Tenants Harbor | 63 | C | 0 |
| 43 | 04087 | Waterboro | 62 | C | 3 |
| 44 | 04537 | Boothbay | 62 | C | 0 |
| 45 | 04055 | Naples | 61 | C | 14 (4 health) |
| 46 | 04073 | Sanford | 61 | C | 4 |
| 47 | 04287 | Bowdoin | 61 | C | 8 |
| 48 | 04989 | Vassalboro | 61 | C | 7 |
| 49 | 03909 | York | 60 | C | 0 |
| 50 | 04062 | Windham | 59 | C | 18 (4 health) |
Overview
Maine's 1st District serving an estimated 2,592,271 residents encompasses 160 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is D (54/100).
1372 EPA violations have been recorded across this district's water systems. 225 are health-based violations. About 42% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Stage 1 DBP Rule — 190 violations
- Surface Water Treatment Rule — 182 violations
- Consumer Confidence Report Rule — 140 violations
- Barium — 108 violations
- Haloacetic Acids (HAA5) — 101 violations
Housing Context
Homes in this district were built on average around 1970 (~56 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.
Data Sources
- Water quality violations: EPA Safe Drinking Water Information System (SDWIS)
- Congressional district boundaries: U.S. Census Bureau, 119th Congress
- Housing age: U.S. Census Bureau American Community Survey
Updated daily. Data covers 160 ZIP codes in Maine's 1st District.