Washington County, Maine
36 ZIP codes · Avg score 66/100 · Grade C · Updated 2026-07-19
ZipCheckup grade for Washington: C.
A mixed picture - some signals here are worth your attention.
Washington County's water quality grade reflects a middle-ground assessment - its 36 ZIP codes range from fully compliant to violation-flagged.
How Washington County Compares
How Washington County Compares
Washington County scores 9 points above the Maine state average (57/100) and 2 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Washington County, Maine
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.2 (asthma 13.2%, diabetes 14.7%)
Estimated additional annual cost per homeowner: $1,091, driven primarily by sea_level
Infrastructure: 0.424% avg pipe failure probability, 58% of ZIPs at high risk
63.6% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
↑ Worsening trendEPA violation counts by year across Washington County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 9 violations. Past 5 years: 23 total (23 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
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: $1,091
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
23,628 housing units in Washington 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 Washington County
Remediation costs are relatively manageable for most homeowners in Washington 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 Washington County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Washington County
8 community water systems serving Washington County.
- C
- B
- C
- B
- B
- B
Show all 8 water systems
- B
- B
24 total water systems serve Washington County.
Systems with the most violations in Washington County
5 water systems with recorded EPA violations.
- B
- C
- B
- B
- C
All ZIP Codes in Washington County
36 ZIP codes tracked in Washington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 04606 | Addison | 83 | B | 1 | $169K |
| 2 | 04622 | Cherryfield | 83 | B | 1 | $153K |
| 3 | 04631 | Eastport | 83 | B | 1 | $148K |
| 4 | 04643 | Harrington | 83 | B | 1 | $147K |
| 5 | 04694 | Baileyville | 83 | B | 0 | $117K |
| 6 | 04619 | Calais | 82 | B | 1 (1 health) | $112K |
| 7 | 04623 | Columbia Falls | 82 | B | 3 | $159K |
| 8 | 04628 | Dennysville | 81 | B | 1 | $126K |
| 9 | 04630 | East Machias | 81 | B | 1 | $181K |
| 10 | 04654 | Machias | 81 | B | 5 | $164K |
| 11 | 04424 | Danforth | 79 | B | 3 | $110K |
| 12 | 04658 | Milbridge | 79 | B | 2 | $214K |
| 13 | 04668 | Princeton | 79 | B | 21 (3 health) | $116K |
| 14 | 04666 | Pembroke | 78 | B | 3 | $120K |
| 15 | 04652 | Lubec | 77 | B | 3 | $183K |
| 16 | 04655 | Machiasport | 76 | B | 2 | $193K |
| 17 | 04438 | Frankfort | 63 | C | 0 | $188K |
| 18 | 04497 | Wytopitlock | 63 | C | 0 | $73K |
| 19 | 04626 | Cutler | 63 | C | 0 | $152K |
| 20 | 04649 | Jonesport | 59 | C | 16 (12 health) | $134K |
| 21 | 04413 | Brookton | 53 | D | 0 | $142K |
| 22 | 04454 | Lambert Lake | 53 | D | 0 | — |
| 23 | 04471 | Orient | 53 | D | 0 | $153K |
| 24 | 04490 | Topsfield | 53 | D | 0 | $117K |
| 25 | 04491 | Vanceboro | 53 | D | 0 | $113K |
| 26 | 04492 | Waite | 53 | D | 0 | $68K |
| 27 | 04611 | Beals | 53 | D | 0 | $260K |
| 28 | 04637 | Grand Lake Stream | 53 | D | 0 | — |
| 29 | 04648 | Jonesboro | 53 | D | 0 | $110K |
| 30 | 04657 | Meddybemps | 53 | D | 0 | $246K |
| 31 | 04667 | Perry | 53 | D | 0 | $156K |
| 32 | 04671 | Robbinston | 53 | D | 0 | $223K |
| 33 | 04680 | Steuben | 53 | D | 0 | $161K |
| 34 | 04686 | Wesley | 53 | D | 0 | $102K |
| 35 | 04691 | Whiting | 53 | D | 0 | $173K |
| 36 | 04865 | West Rockport | 53 | D | 0 | — |
Recommended Buyer Guides for Washington County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance - guides surface only when county data warrants them.
- Best Lead Paint Test Kits — 63.6% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Washington County, Maine
Overview
Washington County in Maine covers 36 ZIP codes with an average Home Safety Score of C (66/100).
16 of 36 ZIP codes have recorded EPA violations. 16 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.