Washington County, Vermont
30 ZIP codes · Avg score 70/100 · Grade B · Updated 2026-06-03
Recent water monitoring in Washington County shows 30 ZIP codes with consistently safe results.
How Washington County Compares
How Washington County Compares
Washington County scores 1 points below the Vermont state average (71/100) and 2 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Washington County, Vermont
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.4 (asthma 10.7%, diabetes 8.9%)
Estimated additional annual cost per homeowner: $1,204, driven primarily by flood
Infrastructure: 0.445% avg pipe failure probability, 55% of ZIPs at high risk
71.7% 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 17 violations. Past 5 years: 38 total (38 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: $1,204
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
31,276 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 with Most Violations
Top 5 systems in Washington County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Crystal Springs Water System | 300 | 51 |
| 2 | Montpelier Water System | 8,912 | 28 |
| 3 | Franklin Water System | 400 | 28 |
| 4 | Derby Mhp | 265 | 28 |
| 5 | Fernwood Manor Mhp | 250 | 28 |
41 total water systems serve Washington County.
All ZIP Codes in Washington County
30 ZIP codes tracked in Washington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 5647 | Cabot | 83 | B | 0 | $240K |
| 2 | 5678 | Websterville | 82 | B | 2 | — |
| 3 | 5654 | Graniteville | 79 | B | 5 | $206K |
| 4 | 5671 | Waterbury | 79 | B | 3 (1 health) | — |
| 5 | 5601 | Montpelier | 78 | B | 4 | — |
| 6 | 5603 | Montpelier | 78 | B | 4 | — |
| 7 | 5604 | Montpelier | 78 | B | 4 | — |
| 8 | 5609 | Montpelier | 78 | B | 4 | — |
| 9 | 5620 | Montpelier | 78 | B | 4 | — |
| 10 | 5649 | East Barre | 78 | B | 8 (1 health) | $183K |
| 11 | 5658 | Marshfield | 78 | B | 1 | $222K |
| 12 | 5702 | Rutland | 78 | B | 8 (1 health) | — |
| 13 | 5660 | Moretown | 77 | B | 7 (1 health) | $410K |
| 14 | 5682 | Worcester | 76 | B | 8 | $254K |
| 15 | 5648 | Calais | 74 | B | 10 | $373K |
| 16 | 5650 | East Calais | 74 | B | 10 | $326K |
| 17 | 5633 | Montpelier | 73 | B | 4 | — |
| 18 | 5663 | Northfield | 72 | B | 2 | $261K |
| 19 | 5651 | East Montpelier | 69 | C | 12 | $324K |
| 20 | 5676 | Waterbury | 69 | C | 3 (1 health) | $347K |
| 21 | 5641 | Barre | 67 | C | 5 (1 health) | $242K |
| 22 | 5667 | Plainfield | 65 | C | 11 | $285K |
| 23 | 5602 | Montpelier | 63 | C | 4 | $342K |
| 24 | 5677 | Waterbury Center | 63 | C | 0 | $474K |
| 25 | 5640 | Adamant | 53 | D | 0 | $313K |
| 26 | 5664 | Northfield Falls | 53 | D | 0 | — |
| 27 | 5670 | South Barre | 53 | D | 0 | — |
| 28 | 5673 | Waitsfield | 53 | D | 19 (15 health) | $434K |
| 29 | 5873 | West Danville | 53 | D | 0 | $245K |
| 30 | 5674 | Warren | 49 | D | 9 (1 health) | $487K |
Recommended Buyer Guides for Washington County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 71.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Washington County, Vermont
Overview
Washington County in Vermont covers 30 ZIP codes with an average Home Safety Score of B (70/100).
24 of 30 ZIP codes have recorded EPA violations. 22 health-based violations have been documented.
← Back to Vermont 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.