Aroostook County, Maine
41 ZIP codes · Avg score 55/100 · Grade C · Updated 2026-07-19
ZipCheckup grade for Aroostook: C.
A mixed picture - some signals here are worth your attention.
Within Aroostook County, 41 tracked ZIP codes reveal moderate water quality - national standards are generally met, with some documented exceptions.
How Aroostook County Compares
How Aroostook County Compares
Aroostook County scores 2 points below the Maine state average (57/100) and 13 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Aroostook 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 13.4%, diabetes 14.8%)
Estimated additional annual cost per homeowner: $1,130, driven primarily by flood
Infrastructure: 0.445% avg pipe failure probability, 78% of ZIPs at high risk
69.5% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Aroostook County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 20 violations. Past 5 years: 56 total (56 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: $1,130
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
40,626 housing units in Aroostook 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 Aroostook County
Remediation costs are relatively manageable for most homeowners in Aroostook 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 Aroostook County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Aroostook County
8 community water systems serving Aroostook County.
- B
- C
- C
- C
- D
- B
Show all 8 water systems
- C
- D
39 total water systems serve Aroostook County.
Systems with the most violations in Aroostook County
5 water systems with recorded EPA violations.
- D
- D
- C
- C
- D
All ZIP Codes in Aroostook County
41 ZIP codes tracked in Aroostook County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 04412 | Brewer | 70 | B | 0 | $218K |
| 2 | 04732 | Ashland | 70 | B | 0 | $120K |
| 3 | 04785 | Van Buren | 70 | B | 1 | $94K |
| 4 | 04730 | Houlton | 69 | C | 3 | $124K |
| 5 | 04736 | Caribou | 69 | C | 2 | $125K |
| 6 | 04746 | Grand Isle | 69 | C | 3 | $85K |
| 7 | 04747 | Island Falls | 69 | C | 4 (1 health) | $116K |
| 8 | 04786 | Washburn | 68 | C | 2 | $105K |
| 9 | 04757 | Mapleton | 66 | C | 1 | $185K |
| 10 | 04760 | Monticello | 66 | C | 0 | $123K |
| 11 | 04762 | New Sweden | 66 | C | 1 | $157K |
| 12 | 04739 | Eagle Lake | 65 | C | 1 | $167K |
| 13 | 04763 | Oakfield | 64 | C | 1 | $114K |
| 14 | 04740 | Easton | 63 | C | 6 (1 health) | $120K |
| 15 | 04756 | Madawaska | 62 | C | 0 | $158K |
| 16 | 04745 | Frenchville | 60 | C | 9 | $133K |
| 17 | 04769 | Presque Isle | 60 | C | 14 (2 health) | $142K |
| 18 | 04742 | Fort Fairfield | 59 | C | 2 (1 health) | $145K |
| 19 | 04750 | Limestone | 59 | C | 11 (3 health) | $93K |
| 20 | 04751 | Limestone | 59 | C | 11 (3 health) | — |
| 21 | 04734 | Blaine | 53 | D | 0 | — |
| 22 | 04761 | New Limerick | 53 | D | 0 | $252K |
| 23 | 04772 | Saint Agatha | 53 | D | 0 | $175K |
| 24 | 04774 | Saint Francis | 53 | D | 0 | $92K |
| 25 | 04779 | Sinclair | 53 | D | 0 | $205K |
| 26 | 04781 | Wallagrass | 53 | D | 0 | $198K |
| 27 | 04783 | Stockholm | 53 | D | 0 | $184K |
| 28 | 04758 | Mars Hill | 51 | D | 16 (10 health) | $146K |
| 29 | 04743 | Fort Kent | 46 | D | 20 | $136K |
| 30 | 04768 | Portage | 45 | D | 0 | $198K |
| 31 | 04735 | Bridgewater | 40 | D | 0 | $102K |
| 32 | 04737 | Clayton Lake | 40 | D | 0 | — |
| 33 | 04738 | Crouseville | 40 | D | 0 | — |
| 34 | 04741 | Estcourt Station | 40 | D | 0 | — |
| 35 | 04744 | Fort Kent Mills | 40 | D | 0 | — |
| 36 | 04764 | Oxbow | 40 | D | 0 | — |
| 37 | 04766 | Perham | 40 | D | 0 | $120K |
| 38 | 04773 | Saint David | 40 | D | 0 | $105K |
| 39 | 04775 | Sheridan | 40 | D | 0 | — |
| 40 | 04780 | Smyrna Mills | 40 | D | 0 | $109K |
| 41 | 04787 | Westfield | 40 | D | 0 | $120K |
Recommended Buyer Guides for Aroostook County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- Best Lead Paint Test Kits — 69.5% 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
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Aroostook County, Maine
Overview
Aroostook County in Maine covers 41 ZIP codes with an average Home Safety Score of C (55/100).
18 of 41 ZIP codes have recorded EPA violations. 21 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.