Superior, AZ: 10 Violations — 81/100 (2026)
2 ZIP codes · 4 water systems · Updated 2026-06-03
Residents of Superior generally live with tap water that beats the AZ safety average on key EPA compliance metrics.
How Superior Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Superior Residents
- Your city's water systems recorded 10 violations in the past 5 years.
- Average lead level: 0.005 mg/L.
- Estimated remediation: $1,300 per household.
- CDC health risk index: 13.46 — above typical levels.
Superior's Water Providers
Superior, AZ draws its residential water from 3 separate providers among the 4 federally tracked systems. Each operates independently, with its own infrastructure, rate structure, and compliance record.
Overview
We track water quality and home safety data for 2 ZIP codes in Superior, Arizona (population ~2,534), covering 4 community water systems serving approximately 67,828 people region-wide.
2 of 2 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Superior: B (81/100)
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
Superior water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0050 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): 2 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 |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 9 | 2 |
| Total Coliform | Microbiological | 3 | 2 |
| Revised Total Coliform Rule | Microbiological | 3 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 85173 | B | 5 | 0 | Arizona Water Company - Superior |
| 85273 | B | 5 | 0 | Arizona Water Company - Superior |
All ZIP Codes in Superior
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.
Superior 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 Superior's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Superior
Within the Superior market, estimated remediation claims a small portion of typical property equity — the financial burden is proportionally low.
Remediation costs in Superior are relatively low compared to home values. The $600–$2,050 estimated range is a small fraction of median property value. Home values are 54% below the Arizona average.
Superior: 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 Superior 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.
Superior: Flood History & Water Damage Risk
Over the multi-decade span captured by FEMA's National Flood Insurance Program, Superior has accumulated a relatively small number of flood claims. That history points to a community where flood exposure is present but contained — and where the pathways by which flooding can affect water quality (overwhelmed treatment plants, contaminated private wells, distribution backflow) remain low-probability events rather than recurring concerns.
Superior has a relatively low flood history with 1 FEMA claims on record. While risk is limited, severe weather events can still impact water infrastructure.
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>$1,300</strong> remediation cost per household.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Superior, AZ