Summit County, Utah
9 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-03
Summit County earns a high water safety grade — 9 ZIP codes tracked, virtually all compliant.
How Summit County Compares
How Summit County Compares
Summit County scores 9 points above the Utah state average (72/100) and 13 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Summit County, Utah
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 9.4 (asthma 10.1%, diabetes 8.7%)
Estimated additional annual cost per homeowner: $761, driven primarily by wildfire
Infrastructure: 0.312% avg pipe failure probability, 11% of ZIPs at high risk
39% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Summit County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 7 violations. Past 5 years: 11 total (11 health-based).
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: $761
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
26,642 housing units in Summit 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 Summit County
Remediation costs are relatively manageable for most homeowners in Summit 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 Summit 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 Summit County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Kamas City Water System | 2,200 | 26 |
| 2 | Marion Waterworks Company | 380 | 26 |
| 3 | Oakley Town Water System | 1,800 | 26 |
| 4 | Peoa Pipeline Company | 141 | 26 |
| 5 | Woodland Mutual Water Company | 190 | 22 |
25 total water systems serve Summit County.
All ZIP Codes in Summit County
9 ZIP codes tracked in Summit County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 84033 | Henefer | 83 | B | 0 | $445K |
| 2 | 84024 | Echo | 82 | B | 1 (1 health) | $429K |
| 3 | 84036 | Kamas | 82 | B | 15 (1 health) | $705K |
| 4 | 84055 | Oakley | 82 | B | 4 (1 health) | $642K |
| 5 | 84068 | Park City | 82 | B | 3 | — |
| 6 | 84098 | Park City | 82 | B | 3 | $1118K |
| 7 | 84017 | Coalville | 81 | B | 5 | $547K |
| 8 | 84061 | Peoa | 80 | B | 7 (2 health) | $705K |
| 9 | 84060 | Park City | 77 | B | 3 | $1753K |
Recommended Buyer Guides for Summit County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- 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 Summit County, Utah
Overview
Summit County in Utah covers 9 ZIP codes with an average Home Safety Score of B (81/100).
8 of 9 ZIP codes have recorded EPA violations. 5 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.