STATE REPORT ME HEALTH VIOLATIONS: 53

Maine Home Safety Profiles by ZIP

485 ZIP codes · 127 water systems · IPC plumbing code

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData, NWS, State plumbing boards, Rewiring America

ZipCheckup tracks drinking-water and home-safety data for 485 ZIP codes across Maine, covering 127 public water systems that serve about 643,046 people. 130 ZIP codes are mapped to at least one water system with an EPA violation on record.

485
ZIP Codes
127
Water Systems
130
ZIPs with Violations
IPC
Plumbing Code
4
Avg Rebate Programs
C · 65
Avg Safety Score
83%
EPA Radon Zone 1 (county-level potential)
#41
of 50 States
11%
ZIPs Rated A or B
67%
ZIPs with Violations
C
Maine average: 65/100 - ranked #41 of 50 states. 8 points below the national average (73). Water systems mapped to 67% of ZIP codes have recorded violations.

Maine averages below the B band on ZipCheckup's composite scale.

Score Distribution

How Maine's 485 ZIP codes are distributed across safety grades.

0
A
7
B
49
C
8
D
1
F
85-10070-8455-6940-540-39

Home Safety Scores by State

Loading map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

Model 4.0.0 inputs: EPA SDWIS, UCMR5 PFAS, EPA radon zones, annual county AQI •

Top 10 ZIP Codes by Home Safety Score in Maine

Highest Home Safety Scores in the state.

#ZIP CodeCityCountyScoreGrade
1 04086 TopshamSagadahoc 83 B
2 04530 BathSagadahoc 83 B
3 04841 RocklandKnox 83 B
4 04843 CamdenKnox 83 B
5 04856 RockportKnox 83 B
6 04861 ThomastonKnox 83 B
7 04863 VinalhavenKnox 83 B
8 03903 EliotYork 67 C
9 03904 KitteryYork 67 C
10 03905 Kittery PointYork 67 C

10 Lowest-Scoring ZIP Codes in Maine

#ZIP CodeCityCountyScoreGradeViolations
1 04730 HoultonAroostook 38 F 32
2 04901 WatervilleKennebec 46 D 12
3 04097 North YarmouthCumberland 47 D 9
4 04021 Cumberland CenterCumberland 47 D 9
5 04252 Lisbon FallsAndroscoggin 48 D 5
6 04096 YarmouthCumberland 48 D 6
7 04989 VassalboroKennebec 49 D 4
8 04083 SpringvaleYork 50 D 0
9 04073 SanfordYork 50 D 0
10 04605 EllsworthHancock 60 C 12

County Rankings

Water quality breakdown by county. 16 counties with data in Maine.

Loading county map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

County-level aggregation of measured ZIP Home Safety Scores • EPA SDWIS, UCMR 5 PFAS, EPA radon zones, EPA AirData

CountyAvg ScoreGradeZIPsBest ZIPWorst ZIP
23001 60 C 24 04240 (67) 04252 (48)
23003 61 C 45 04412 (67) 04730 (38)
23005 61 C 50 04011 (67) 04097 (47)
23007 N/A N/A 20 N/A N/A
23009 64 C 44 04609 (67) 04605 (60)
23011 58 C 33 04330 (66) 04901 (46)
23013 83 B 21 04841 (83) 04863 (83)
23015 N/A N/A 26 N/A N/A
23017 66 C 32 04276 (66) 04276 (66)
23019 66 C 44 04411 (67) 04401 (63)
23021 N/A N/A 12 N/A N/A
23023 83 B 10 04086 (83) 04530 (83)
23025 N/A N/A 28 N/A N/A
23027 N/A N/A 19 N/A N/A
23029 N/A N/A 32 N/A N/A
23031 64 C 44 03903 (67) 04083 (50)

Most Common Contaminants in Maine

Contaminant / RuleCategoryZIPs AffectedViolationsHealth Risk
Surface Water Treatment Rule Treatment Technique 67 112 No
Haloacetic Acids (HAA5) Disinfection Byproducts 66 106 Yes
Total Trihalomethanes (TTHM) Disinfection Byproducts 62 113 Yes
Stage 1 DBP Rule Treatment Technique 58 89 Yes
Consumer Confidence Report Rule Reporting 32 45 Yes
Contaminant 1011 Other 25 56 No
Chlorite Disinfection Byproducts 24 46 No
Lead and Copper Rule Treatment Technique 19 30 No

Overview

We track multi-source home safety signals for 485 ZIP records across Maine. Home Safety Score model 4.0.0 is published for 65 scored records; missing required evidence suppresses the score.

The EPA snapshots used for this build directly map water systems to 194 ZIP records, covering 127 community water systems that serve approximately 643,046 people.

130 of 194 ZIP codes with a reported violation count in the available EPA record (67%) have recorded EPA violations. 53 health-based violations appear in the available health breakdown.

Plumbing Regulations

Maine follows the Maine Internal Plumbing Code (2015 edition).

  • Plumbing code: IPC (2015)
  • Homeowner DIY: Licensed plumber required
  • Water heater permit: Required
  • Annual backflow test: Required

Full Maine regulations →

Energy & Water Rebates

Across 486 tracked ZIP codes in Maine, residents have access to an average of 4 water-related rebate programs - including incentives for heat pump water heaters, efficient fixtures, and plumbing upgrades.

Check rebates for your ZIP code →

Areas with Most Violations

ZIP Code City Home Safety Grade Violations Health-Based System
04734 Blaine — 53 13 Mars Hill and Blaine Water Company
04758 Mars Hill — 53 13 Mars Hill and Blaine Water Company
04787 Westfield — 53 13 Mars Hill and Blaine Water Company
04937 Fairfield — 39 0 Kennebec Water District
04730 Houlton F 32 0 Houlton Water Company
03906 North Berwick — 23 0 North Berwick Water District
04239 Jay — 16 9 Jay Village Water District
04074 Scarborough C 13 0 Portland Water District-greater
04605 Ellsworth C 12 5 Ellsworth Water Department
04901 Waterville D 12 1 Kennebec Water District

Areas with No Violations

ZIP Code City Home Safety Grade System Population
03902 Cape Neddick — York Water District 13,675
03903 Eliot C Kittery Water District 14,478
03904 Kittery C Kittery Water District 14,478
03905 Kittery Point C Kittery Water District 14,478
03908 South Berwick C South Berwick Water District 3,722
03909 York C York Water District 13,675
03910 York Beach — York Water District 13,675
03911 York Harbor — York Water District 13,675
04002 Alfred — Alfred Water District 783
04008 Bowdoinham — Bowdoinham Water District 738

Home Safety Score

Average Home Safety Score for Maine: C (65/100) across 65 scored of 485 tracked ZIP records.

Model 4.0.0 uses the canonical components water-compliance, pfas-mcl-screen, radon-zone, annual-aqi across 3 required domains. The sections below provide additional context and do not change that score. Missing required evidence suppresses the score, and a favorable result is not a property-level safety certification.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0027 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 194 ZIP codes with known status exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 403 ZIP codes (83%)
  • Moderate risk (Zone 2): 82 ZIP codes
  • Low risk (Zone 3): 0 ZIP codes

ZIP Code Reports for Maine

Largest Communities

ZIP Code City Population Safety Grade Violations
04017 Chebeague Island 145,768 — 9
04021 Cumberland Center 145,768 D 9
04110 Cumberland Foreside 145,768 — 9
04097 North Yarmouth 143,068 D 9
04074 Scarborough 135,178 C 13
04062 Windham 135,103 C 8
04019 Cliff Island 135,068 — 6
04038 Gorham 135,068 C 6
04050 Long Island 135,068 — 6
04071 Raymond 135,068 C 6
04084 Standish 135,068 C 6
04085 Steep Falls 135,068 C 6
04092 Westbrook 135,068 C 6
04096 Yarmouth 135,068 D 6
04101 Portland 135,068 C 6
04102 Portland 135,068 C 6
04103 Portland 135,068 C 6
04105 Falmouth 135,068 C 6
04106 South Portland 135,068 C 6
04107 Cape Elizabeth 135,068 C 6

Lowest Published Home Safety Scores

ZIP Code City Score Grade Violations
04730 Houlton 38 F 32
04901 Waterville 46 D 12
04021 Cumberland Center 47 D 9
04097 North Yarmouth 47 D 9
04096 Yarmouth 48 D 6

Highest Published Home Safety Scores

ZIP Code City Score Grade Violations
04086 Topsham 83 B 0
04530 Bath 83 B 0
04841 Rockland 83 B 2
04843 Camden 83 B 2
04856 Rockport 83 B 2

All 485 ZIP Codes in Maine

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Largest water systems in Maine

The 12 largest community water systems in Maine, out of 127 in our data.

Show all 12 water systems

Systems with the most violations in Maine

12 systems in Maine with the most recorded EPA violations.

Frequently Asked Questions

Is the water safe to drink in Maine?

Maine has 127 community water systems serving 643,046 people across 485 ZIP codes. There are 384 recorded violations among these water systems, including 53 health-based. 130 of 485 ZIP codes are mapped to at least one water system with a recorded violation.

What plumbing code does Maine follow?

Maine's listed plumbing code type is IPC as of our last review; local jurisdictions may adopt or amend codes. Plumbing work may require a licensed plumber; check state exemptions and local requirements.

What is the radon risk in Maine?

83% of ZIP codes in Maine are mapped to counties classified as EPA Radon Zone 1 (highest county-level radon potential).

How to cite this page

APA ZipCheckup. (2026). Maine Home Safety Profiles by ZIP. https://zipcheckup.com/states/maine/
BibTeX 
@misc{zipcheckup-states-maine,
  author = {{ZipCheckup}},
  title  = {{Maine Home Safety Profiles by ZIP}},
  year   = {2026},
  url    = {https://zipcheckup.com/states/maine/}
}

Page version: October 2026.

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