Washington County, Utah
22 ZIP codes · Avg score 72/100 · Grade B · Updated 2026-06-03
In current tracking cycles, Washington County — spanning 22 ZIP codes — records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Washington County Compares
How Washington County Compares
Washington County scores 0 points above the Utah state average (72/100) and 4 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Washington County, Utah
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.1 (asthma 10.7%, diabetes 10.7%)
Estimated additional annual cost per homeowner: $1,586, driven primarily by wildfire
Infrastructure: 0.262% avg pipe failure probability
29.9% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Washington County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 2 violations. Past 5 years: 7 total (7 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: $1,586
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
75,775 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 | Toquerville Town Water System | 1,931 | 17 |
| 2 | Enterprise Town Water System | 2,200 | 16 |
| 3 | Leeds Domestic Water Users Association | 800 | 15 |
| 4 | Mountain Springs Water Company | 660 | 15 |
| 5 | Virgin | 1,512 | 11 |
28 total water systems serve Washington County.
All ZIP Codes in Washington County
22 ZIP codes tracked in Washington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 84774 | Toquerville | 83 | B | 0 | $463K |
| 2 | 84725 | Enterprise | 82 | B | 6 (1 health) | $350K |
| 3 | 84733 | Gunlock | 82 | B | 5 (1 health) | — |
| 4 | 84779 | Virgin | 81 | B | 2 | $466K |
| 5 | 84782 | Veyo | 81 | B | 2 | $466K |
| 6 | 84738 | Ivins | 80 | B | 3 | $541K |
| 7 | 84765 | Santa Clara | 80 | B | 3 | $510K |
| 8 | 84737 | Hurricane | 79 | B | 5 | $421K |
| 9 | 84745 | La Verkin | 79 | B | 2 | $367K |
| 10 | 84763 | Rockville | 79 | B | 3 (1 health) | $658K |
| 11 | 84783 | Dammeron Valley | 78 | B | 1 (1 health) | $646K |
| 12 | 84757 | New Harmony | 77 | B | 6 | $596K |
| 13 | 84784 | Hildale | 77 | B | 4 | $386K |
| 14 | 84767 | Springdale | 74 | B | 2 | $832K |
| 15 | 84780 | Washington | 73 | B | 1 | $512K |
| 16 | 84722 | Central | 68 | C | 8 | $350K |
| 17 | 84790 | Saint George | 63 | C | 0 | $501K |
| 18 | 84746 | Leeds | 57 | C | 2 | $401K |
| 19 | 84770 | Saint George | 55 | C | 0 | $407K |
| 20 | 84771 | Saint George | 53 | D | 0 | — |
| 21 | 84781 | Pine Valley | 53 | D | 0 | $571K |
| 22 | 84791 | Saint George | 53 | D | 0 | — |
Recommended Buyer Guides for Washington County
Independent picks. EPA-grounded. Matched here.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Washington County, Utah
Overview
Washington County in Utah covers 22 ZIP codes with an average Home Safety Score of B (72/100).
16 of 22 ZIP codes have recorded EPA violations. 4 health-based violations have been documented.
← Back to Utah 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.