Cumberland County, Maine
45 ZIP codes · Avg score 56/100 · Grade C · Updated 2026-06-03
Compared to top-scoring counties, Cumberland County's 45 ZIP codes land in the middle tier — some meet standards cleanly, others carry documented violations, and the gap between the best and worst areas is wider than average.
How Cumberland County Compares
How Cumberland County Compares
Cumberland County scores 1 points below the Maine state average (57/100) and 12 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Cumberland County, Maine
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.6 (asthma 11.9%, diabetes 9.2%)
Estimated additional annual cost per homeowner: $730, driven primarily by flood
Infrastructure: 0.383% avg pipe failure probability, 30% of ZIPs at high risk
61.5% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↓ Improving trendEPA violation counts by year across Cumberland County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 13 violations. Past 5 years: 24 total (24 health-based). Health-based violations are declining versus the prior 2-year window.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $730
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
120,990 housing units in Cumberland County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Cumberland County
Remediation costs are relatively manageable for most homeowners in Cumberland County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Cumberland County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Cumberland County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | PORTLAND WATER DISTRICT-GREATER | 135,068 | 205 |
| 2 | Portland Water District/steep Falls | 480 | 172 |
| 3 | Duck-a-way on Casco Bay | 65 | 168 |
| 4 | Squire Court Llc | 75 | 168 |
| 5 | Turner Square Apartments | 63 | 168 |
36 total water systems serve Cumberland County.
All ZIP Codes in Cumberland County
45 ZIP codes tracked in Cumberland County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 4032 | Freeport | 70 | B | 0 | $446K |
| 2 | 4038 | Gorham | 70 | B | 1 | $426K |
| 3 | 4039 | Gray | 68 | C | 6 (2 health) | $333K |
| 4 | 4104 | Portland | 67 | C | 21 (3 health) | — |
| 5 | 4109 | Portland | 67 | C | 21 (3 health) | $718K |
| 6 | 4033 | Freeport | 66 | C | 0 | — |
| 7 | 4034 | Freeport | 66 | C | 0 | — |
| 8 | 4260 | New Gloucester | 66 | C | 1 | $317K |
| 9 | 4015 | Casco | 65 | C | 1 | $285K |
| 10 | 4084 | Standish | 65 | C | 4 | $335K |
| 11 | 4040 | Harrison | 64 | C | 4 | $244K |
| 12 | 4062 | Windham | 62 | C | 5 (1 health) | $371K |
| 13 | 4092 | Westbrook | 62 | C | 5 (1 health) | $342K |
| 14 | 4098 | Westbrook | 62 | C | 5 (1 health) | — |
| 15 | 4102 | Portland | 62 | C | 21 (3 health) | $464K |
| 16 | 4103 | Portland | 62 | C | 21 (3 health) | $422K |
| 17 | 4112 | Portland | 62 | C | 21 (3 health) | — |
| 18 | 4122 | Portland | 62 | C | 21 (3 health) | — |
| 19 | 4123 | Portland | 62 | C | 21 (3 health) | — |
| 20 | 4124 | Portland | 62 | C | 21 (3 health) | — |
| 21 | 4070 | Scarborough | 60 | C | 7 | — |
| 22 | 4011 | Brunswick | 57 | C | 10 | $344K |
| 23 | 4079 | Harpswell | 57 | C | 11 | $566K |
| 24 | 4009 | Bridgton | 56 | C | 21 | $287K |
| 25 | 4074 | Scarborough | 54 | D | 7 | $503K |
| 26 | 4017 | Chebeague Island | 53 | D | 0 | $510K |
| 27 | 4021 | Cumberland Center | 53 | D | 0 | $507K |
| 28 | 4022 | Denmark | 53 | D | 0 | $237K |
| 29 | 4029 | Sebago | 53 | D | 0 | $273K |
| 30 | 4078 | South Freeport | 53 | D | 0 | — |
| 31 | 4082 | South Windham | 53 | D | 0 | — |
| 32 | 4088 | Waterford | 53 | D | 0 | $243K |
| 33 | 4097 | North Yarmouth | 53 | D | 0 | $480K |
| 34 | 4565 | Sebasco Estates | 53 | D | 0 | — |
| 35 | 4096 | Yarmouth | 52 | D | 2 | $573K |
| 36 | 4003 | Bailey Island | 45 | D | 0 | $625K |
| 37 | 4107 | Cape Elizabeth | 45 | D | 0 | $660K |
| 38 | 4562 | Phippsburg | 45 | D | 0 | $335K |
| 39 | 4071 | Raymond | 43 | D | 13 (7 health) | $368K |
| 40 | 4013 | Bustins Island | 40 | D | 0 | — |
| 41 | 4057 | North Bridgton | 40 | D | 0 | — |
| 42 | 4069 | Pownal | 40 | D | 0 | $400K |
| 43 | 4077 | South Casco | 40 | D | 0 | — |
| 44 | 4110 | Cumberland Foreside | 40 | D | 0 | $955K |
| 45 | 4055 | Naples | 38 | F | 6 (2 health) | $257K |
Recommended Buyer Guides for Cumberland County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 61.5% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
Deep Dive Reports
Detailed analysis for Cumberland County, Maine
Overview
Cumberland County in Maine covers 45 ZIP codes with an average Home Safety Score of C (56/100).
25 of 45 ZIP codes have recorded EPA violations. 38 health-based violations have been documented.
← Back to Maine water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.