San Luis, AZ: 2 Health Violations — 81/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
In current AZ EPA data, San Luis's tap water sits in the high-safety tier.
How San Luis Compares
Data: EPA SDWIS Last verified: 2026-06-03
San Luis Water: The Quick Version
- Your city's water systems recorded 8 violations in the past 5 years.
- Average lead level: 0.001 mg/L.
- Homes built before 1986: 22% — older plumbing may contain lead solder.
- Estimated remediation: $700 per household.
- CDC health risk index: 13.4 — above typical levels.
Water Systems Serving San Luis
One utility dominates residential water service in San Luis, AZ — out of 1 system in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in San Luis, Arizona, covering 1 community water system serving approximately 28,810 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 2 health-based violations documented.
Home Safety Score
Average Home Safety Score for San Luis: 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
San Luis 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)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 4 | 1 |
| Consumer Confidence Report Rule | Reporting | 4 | 1 |
| Contaminant 0700 | Other | 4 | 1 |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 2 | 1 |
| Total Coliform | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 85349 | B | 8 | 2 | City of San Luis |
All ZIP Codes in San Luis
- 85349 [B] — 8 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.
CDC Health Data for San Luis
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
Key Contaminants Detected in San Luis
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is San Luis's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Cities with large shares of pre-1986 housing carry elevated aggregate risk from lead-soldered plumbing; San Luis sits on the lower end of that spectrum. The median build year of 2007 reflects a housing stock in which post-ban construction is dominant — meaning lead-soldered copper joints are less prevalent across the city as a whole. Still, aggregate figures don't tell you what's happening inside a specific older home. Any structure built before 1986, and particularly those built before 1970 when lead pipes were commonly installed, can still present meaningful lead risk regardless of the city-wide picture.
Most homes in San Luis were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
San Luis: Remediation Cost in Perspective
Property equity in San Luis 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 San Luis are relatively low compared to home values. The $150–$1,400 estimated range is a small fraction of median property value. Home values are 36% below the Arizona average.
Protecting Children from Lead in San Luis
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.
Aggregate sampling rests beneath the federal action threshold here, while only 22% of San Luis housing predates the solder rule change.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for San Luis, AZ