Yuma County, Arizona
12 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Across Yuma County's 12 ZIP codes, water safety results are uneven — a portion of systems carry active or recent violations, while others meet standards without issues.
How Yuma County Compares
How Yuma County Compares
Yuma County scores 1 points below the Arizona state average (64/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Yuma County, Arizona
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.4 (asthma 9.7%, diabetes 14.5%)
Estimated additional annual cost per homeowner: $646, driven primarily by flood
Infrastructure: 0.359% avg pipe failure probability, 17% of ZIPs at high risk
39.2% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Yuma County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 53 violations. Past 5 years: 126 total (66 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: $646
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
92,818 housing units in Yuma 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 Yuma County
Remediation costs are relatively manageable for most homeowners in Yuma 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 Yuma 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 Yuma County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Yuma | 103,264 | 366 |
| 2 | Foothills Water and Sewer Llc | 32,425 | 360 |
| 3 | Usmc Yuma Main System | 6,324 | 360 |
| 4 | Rose Valley Water Company | 6,202 | 360 |
| 5 | Aspc Yuma | 4,197 | 360 |
15 total water systems serve Yuma County.
All ZIP Codes in Yuma County
12 ZIP codes tracked in Yuma County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 85349 | San Luis | 81 | B | 8 (2 health) | $197K |
| 2 | 85350 | Somerton | 79 | B | 6 | $211K |
| 3 | 85333 | Dateland | 70 | B | 20 (2 health) | — |
| 4 | 85336 | Gadsden | 64 | C | 7 | $198K |
| 5 | 85365 | Yuma | 64 | C | 72 (19 health) | $190K |
| 6 | 85367 | Yuma | 64 | C | 72 (19 health) | $185K |
| 7 | 85366 | Yuma | 59 | C | 72 (19 health) | — |
| 8 | 85369 | Yuma | 59 | C | 72 (19 health) | — |
| 9 | 85352 | Tacna | 58 | C | 78 (24 health) | — |
| 10 | 85347 | Roll | 55 | C | 0 | — |
| 11 | 85364 | Yuma | 54 | D | 72 (19 health) | $204K |
| 12 | 85356 | Wellton | 53 | D | 140 (29 health) | $117K |
Recommended Buyer Guides for Yuma County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- 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 Yuma County, Arizona
Overview
Yuma County in Arizona covers 12 ZIP codes with an average Home Safety Score of C (63/100).
11 of 12 ZIP codes have recorded EPA violations. 152 health-based violations have been documented.
← Back to Arizona 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.