Casa Grande, AZ: 8 Health Violations — 82/100 (2026)
8 ZIP codes · 8 water systems · Updated 2026-06-03
Looking at federal monitoring data for Casa Grande, AZ: the city clears benchmarks set under the Safe Drinking Water Act with room to spare — recorded exceedances are rare, and the systems serving local households have not triggered any pattern of repeat deficiencies in recent cycles.
How Casa Grande Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Casa Grande, AZ
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Casa Grande's 8 ZIP codes.
Key Facts for Casa Grande Residents
- Your city's water systems recorded 72 violations in the past 5 years.
- Average lead level: 0.001 mg/L.
- Estimated remediation: $1,738 per household.
- CDC health risk index: 13.46 — above typical levels.
Casa Grande's Water Providers
Residential addresses in Casa Grande, AZ are served by 3 primary water providers out of 8 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 8 ZIP codes in Casa Grande, Arizona (population ~71,194), covering 8 community water systems serving approximately 157,720 people region-wide.
8 of 8 ZIP codes (100%) have recorded EPA violations. 8 health-based violations documented.
Home Safety Score
Average Home Safety Score for Casa Grande: B (82/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Casa Grande water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0010 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 8 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Lead | Inorganic | 18 | 8 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 18 | 8 |
| Stage 2 DBP Rule | Treatment Technique | 18 | 8 |
| Barium | Inorganic | 9 | 8 |
| Total Coliform | Microbiological | 9 | 8 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 85122 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
| 85130 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
| 85193 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
| 85194 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
| 85222 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
| 85230 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
| 85293 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
| 85294 | B | 9 | 1 | Arizona Water Company - Pinal Valley |
All ZIP Codes in Casa Grande
- 85122 [B] — 9 violations ⚠
- 85130 [B] — 9 violations ⚠
- 85193 [B] — 9 violations ⚠
- 85194 [B] — 9 violations ⚠
- 85222 [B] — 9 violations ⚠
- 85230 [B] — 9 violations ⚠
- 85293 [B] — 9 violations ⚠
- 85294 [B] — 9 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Casa Grande Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Casa Grande's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Casa Grande
Property equity in Casa Grande runs well ahead of estimated remediation costs — a cost-to-value ratio that sits in the low tier, meaning documented water and safety issues here are the kind homeowners can plan to address without treating the expense as a significant budget event relative to what their homes are worth.
Remediation costs in Casa Grande are relatively low compared to home values. The $838–$2,888 estimated range is a small fraction of median property value. Home values are 21% below the Arizona average.
Casa Grande: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Casa Grande appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Casa Grande: Flood History & Water Damage Risk
Flood activity in Casa Grande is neither negligible nor at the level of the highest-exposure areas in the NFIP dataset. The 26-claim record and 63% flood zone coverage suggest a community that has experienced recurrent events but has not faced the kind of sustained, severe exposure where water-supply contamination becomes a primary public health concern. It sits in a middle range where flood history merits inclusion in any complete local water quality picture.
Casa Grande has a moderate flood history with 26 FEMA claims averaging $22,276 per payout. 63% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,738</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Casa Grande, AZ