Washington County, Rhode Island
24 ZIP codes · Avg score 54/100 · Grade D · Updated 2026-06-03
Water monitoring data from Washington County's 24 ZIP codes tells a below-average story — health violations are present and system-level detail is worth checking.
How Washington County Compares
How Washington County Compares
Washington County scores 7 points below the Rhode Island state average (61/100) and 14 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Washington County, Rhode Island
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.5 (asthma 10.8%, diabetes 9.1%)
Estimated additional annual cost per homeowner: $2,055, driven primarily by flood
Infrastructure: 0.463% avg pipe failure probability, 82% of ZIPs at high risk
67.2% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Washington County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 33 violations. Past 5 years: 65 total (65 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: $2,055
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
74,613 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 | Bethel Village Water Assn | 180 | 62 |
| 2 | Hopkinton, Town of | 125 | 62 |
| 3 | Split Rock Corporation | 138 | 48 |
| 4 | South Trail Commerce | 175 | 44 |
| 5 | Canonchet Cliffs Water Association Inc. | 154 | 44 |
33 total water systems serve Washington County.
All ZIP Codes in Washington County
24 ZIP codes tracked in Washington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 2881 | Kingston | 70 | B | 0 | $481K |
| 2 | 2804 | Ashaway | 69 | C | 19 (1 health) | $303K |
| 3 | 2880 | Wakefield | 67 | C | 6 (3 health) | — |
| 4 | 2807 | Block Island | 65 | C | 1 | $936K |
| 5 | 2898 | Wyoming | 65 | C | 4 (1 health) | $399K |
| 6 | 2832 | Hope Valley | 64 | C | 1 (1 health) | $391K |
| 7 | 2892 | West Kingston | 63 | C | 2 | $480K |
| 8 | 2822 | Exeter | 62 | C | 37 (5 health) | $470K |
| 9 | 2874 | Saunderstown | 60 | C | 7 (2 health) | $635K |
| 10 | 2833 | Hopkinton | 59 | C | 43 (5 health) | $272K |
| 11 | 2852 | North Kingstown | 54 | D | 11 (1 health) | $462K |
| 12 | 2808 | Bradford | 53 | D | 0 | $332K |
| 13 | 2813 | Charlestown | 53 | D | 9 (2 health) | $468K |
| 14 | 2836 | Kenyon | 53 | D | 0 | — |
| 15 | 2877 | Slocum | 53 | D | 0 | — |
| 16 | 2894 | Wood River Junction | 53 | D | 0 | $342K |
| 17 | 2879 | Wakefield | 52 | D | 6 (3 health) | $516K |
| 18 | 2891 | Westerly | 41 | D | 3 | $423K |
| 19 | 2812 | Carolina | 40 | D | 0 | $475K |
| 20 | 2873 | Rockville | 40 | D | 0 | — |
| 21 | 2875 | Shannock | 40 | D | 0 | $415K |
| 22 | 2883 | Peace Dale | 40 | D | 0 | — |
| 23 | 2818 | East Greenwich | 35 | F | 0 | $565K |
| 24 | 2882 | Narragansett | 33 | F | 15 (10 health) | $686K |
Recommended Buyer Guides for Washington County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 67.2% 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 Washington County, Rhode Island
Overview
Washington County in Rhode Island covers 24 ZIP codes with an average Home Safety Score of D (54/100).
14 of 24 ZIP codes have recorded EPA violations. 34 health-based violations have been documented.
← Back to Rhode Island 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.
What You Can Do
Washington County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
67.2% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.