Pinal County, Arizona
48 ZIP codes · Avg score 71/100 · Grade B · Updated 2026-06-03
Pinal County maintains reliable drinking water quality across all 48 of its tracked ZIP codes.
How Pinal County Compares
How Pinal County Compares
Pinal County scores 7 points above the Arizona state average (64/100) and 3 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Pinal 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 10.8%, diabetes 12.9%)
Estimated additional annual cost per homeowner: $1,498, driven primarily by wildfire
Infrastructure: 0.34% avg pipe failure probability, 19% of ZIPs at high risk
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Pinal County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 89 violations. Past 5 years: 213 total (213 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: $1,498
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Pinal County
Remediation costs are relatively manageable for most homeowners in Pinal 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 Pinal 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 Pinal County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Arizona Water Company - Pinal Valley | 134,432 | 403 |
| 2 | Gw Santa Cruz Water Company - Red Rock | 3,813 | 332 |
| 3 | Gw Santa Cruz Water Company | 84,000 | 288 |
| 4 | Gw Farmers Water Company - Continental | 5,592 | 288 |
| 5 | Gw Farmers Water Company - Santa Rita Springs | 3,990 | 288 |
54 total water systems serve Pinal County.
All ZIP Codes in Pinal County
48 ZIP codes tracked in Pinal County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 85623 | Oracle | 83 | B | 0 | $385K |
| 2 | 85122 | Casa Grande | 82 | B | 9 (1 health) | $243K |
| 3 | 85130 | Casa Grande | 82 | B | 9 (1 health) | — |
| 4 | 85193 | Casa Grande | 82 | B | 9 (1 health) | $119K |
| 5 | 85194 | Casa Grande | 82 | B | 9 (1 health) | $319K |
| 6 | 85222 | Casa Grande | 82 | B | 9 (1 health) | — |
| 7 | 85230 | Casa Grande | 82 | B | 9 (1 health) | — |
| 8 | 85293 | Casa Grande | 82 | B | 9 (1 health) | — |
| 9 | 85294 | Casa Grande | 82 | B | 9 (1 health) | — |
| 10 | 85631 | San Manuel | 82 | B | 2 (1 health) | $113K |
| 11 | 85173 | Superior | 81 | B | 5 | $141K |
| 12 | 85273 | Superior | 81 | B | 5 | — |
| 13 | 85241 | Picacho | 80 | B | 35 (3 health) | — |
| 14 | 85128 | Coolidge | 79 | B | 46 (4 health) | $208K |
| 15 | 85131 | Eloy | 79 | B | 54 (1 health) | $244K |
| 16 | 85132 | Florence | 79 | B | 46 (4 health) | $315K |
| 17 | 85141 | Picacho | 79 | B | 35 (3 health) | — |
| 18 | 85228 | Coolidge | 79 | B | 46 (4 health) | — |
| 19 | 85231 | Eloy | 78 | B | 54 (1 health) | — |
| 20 | 85232 | Florence | 78 | B | 46 (4 health) | — |
| 21 | 85240 | Queen Creek | 78 | B | 35 (1 health) | — |
| 22 | 85243 | Queen Creek | 78 | B | 35 (1 health) | — |
| 23 | 85279 | Florence | 78 | B | 46 (4 health) | — |
| 24 | 85192 | Winkelman | 76 | B | 23 (2 health) | $157K |
| 25 | 85118 | Gold Canyon | 74 | B | 12 (4 health) | $447K |
| 26 | 85220 | Apache Junction | 74 | B | 34 (6 health) | — |
| 27 | 85117 | Apache Junction | 72 | B | 34 (6 health) | — |
| 28 | 85178 | Apache Junction | 72 | B | 34 (6 health) | — |
| 29 | 85218 | Apache Junction | 72 | B | 34 (6 health) | — |
| 30 | 85137 | Kearny | 70 | B | 34 (4 health) | $132K |
| 31 | 85119 | Apache Junction | 69 | C | 34 (6 health) | $259K |
| 32 | 85120 | Apache Junction | 69 | C | 34 (6 health) | $163K |
| 33 | 85140 | San Tan Valley | 69 | C | 31 | $412K |
| 34 | 85143 | San Tan Valley | 69 | C | 31 | $351K |
| 35 | 85145 | Red Rock | 66 | C | 22 (1 health) | $253K |
| 36 | 85245 | Red Rock | 66 | C | 22 (1 health) | — |
| 37 | 85237 | Kearny | 65 | C | 34 (4 health) | — |
| 38 | 85191 | Valley Farms | 63 | C | 0 | — |
| 39 | 85138 | Maricopa | 58 | C | 72 (27 health) | $343K |
| 40 | 85139 | Maricopa | 58 | C | 72 (27 health) | $293K |
| 41 | 85239 | Maricopa | 58 | C | 72 (27 health) | — |
| 42 | 85123 | Arizona City | 56 | C | 32 (4 health) | $226K |
| 43 | 85618 | Mammoth | 54 | D | 5 | $100K |
| 44 | 85190 | Tortilla Flat | 53 | D | 0 | — |
| 45 | 85172 | Stanfield | 50 | D | 55 (26 health) | $163K |
| 46 | 85238 | Maricopa | 50 | D | 72 (27 health) | — |
| 47 | 85272 | Stanfield | 50 | D | 55 (26 health) | — |
| 48 | 85223 | Arizona City | 48 | D | 32 (4 health) | — |
Recommended Buyer Guides for Pinal County
Editorial-only picks, screened against the EPA detections on file.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- 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 Pinal County, Arizona
Overview
Pinal County in Arizona covers 48 ZIP codes with an average Home Safety Score of B (71/100).
45 of 48 ZIP codes have recorded EPA violations. 259 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.