CITY REPORT AZ HEALTH VIOLATIONS: 3

San Luis, AZ: 3 Health Violations - Home Safety 77/100

1 ZIP code · 1 water system · Updated

ZipCheckup grade for San Luis: B.

This ZIP has a few items worth a quick check.

Based on available records, San Luis, AZ holds an A or B ZipCheckup grade.

How San Luis Compares

San Luis77/100
Arizona avg66/100
National avg73/100

Data: EPA SDWIS

1
ZIP Codes
1
Water Systems
1
ZIPs Linked to Systems with Violations
B · 77
Avg Safety Score
Zone 2
County Radon Potential (Moderate)
$197K
Median Home Value
$600
Est. Remediation (0.3% of home value)

San Luis Water: The Quick Version

  • Your city's water systems recorded 9 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.001 mg/L.
  • Homes built before 1986: 22% - older plumbing may contain lead solder.
  • Estimated remediation: $600 per household.
  • Health risk index (ZipCheckup composite of CDC data): 13.4.

Water Systems Serving San Luis

Because water system records on this page are matched to San Luis, AZ through ZIP codes rather than street addresses, the single system in the list below reflects that matching, while federal data connect 1 to the area overall. Anyone unsure which utility supplies a home can check the water bill or contact the utility directly.

Overview

We track home safety data for 1 ZIP code in San Luis, Arizona, covering 1 community water system serving approximately 28,810 people. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 3 health-based violations appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for San Luis: B (77/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor What It Measures
Water Quality EPA violations and compliance history
PFAS MCL Screen UCMR 5 testing against the covered federal MCLs
Radon Risk EPA radon zone classification
Annual AQI EPA AirData county-year median with at least 90 observed days

Water Sources

San Luis water systems draw from: Groundwater.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0010 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status exceed the EPA lead action level

Radon Risk

1 of 1 ZIP records with known zones is in EPA Radon Zone 2.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

Top Contaminants

Contaminant Category Violations ZIPs Affected
Revised Total Coliform Rule Microbiological 6 1
Lead and Copper Rule Treatment Technique 4 1
Groundwater Rule Treatment Technique 4 1
Total Trihalomethanes (TTHM) Disinfection Byproducts 2 1
E. coli Microbiological 2 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
85349 B 9 3 City of San Luis

All ZIP Codes in San Luis

  • 85349 [B] - 9 violations ⚠

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

CDC Health Data for San Luis

9.7%
Asthma (US: 9.8%)
14.5%
Diabetes (US: 10.4%)
15.3%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.

Compared to National Average

Asthma 9.7% ↓
Diabetes 14.5% ↑
Mental Health 15.3% ↑

Vertical line = national average. ■ Above national · ■ Below national

Key Contaminants Detected in San Luis

Revised Total Coliform Rule 6 violations
Microbiological
Indicates possible bacterial contamination
Lead and Copper Rule 4 violations
Treatment Technique
Developmental delays in children, kidney damage
Groundwater Rule 4 violations
Treatment Technique

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

How Old Is San Luis's Housing Stock?

2007
Median Build Year
22%
Built Before 1986
8%
Built Before 1970
PEX or Copper
Likely Pipe Material

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

Construction dates in San Luis center on a median of 2007, and the Census figures behind it describe when homes were built, not what materials they contain.

2007
Median Year Built
22%
Pre-1986 (lead solder era; lead paint banned 1978)
8%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (8%) 1970–1986 (14%) Post-1986 (78%)

Most homes in San Luis were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

San Luis: Remediation Cost in Perspective

The remediation-to-value ratio for San Luis sits at the bottom of the scale.

Median Home Value
$196,800
Est. Remediation
$600
Remediation as % of home value 0.3%

Estimated remediation costs in San Luis can be compared with local home values. The $300–$1,500 estimated range can be set against the median property value; actual costs vary by home. Home values are 36% below the Arizona average.

Protecting Children from Lead in San Luis

22%
Homes Built Before 1986
0.001
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

Roughly 22% of homes in San Luis were built before 1986, when federal law restricted lead in new plumbing.

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

Frequently Asked Questions

What does the Home Safety Score mean for San Luis, AZ?
San Luis has an average Home Safety Score of 77/100 (Grade B) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. 9 violations appear in EPA records for water systems mapped to these ZIP codes. Check individual ZIP code reports for component details.
How many violations are on record for water systems serving San Luis?
EPA records list 9 EPA violations, including 3 health-based violations for San Luis water systems. These water-system violations are shown for 1 mapped ZIP code.
Does San Luis water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of San Luis is 0.001 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does San Luis compare to Arizona average?
San Luis has an average Home Safety Score of 77/100, which is at or above the Arizona state average of 66/100 for the same model series.
How many water systems serve San Luis?
Our records map 1 water system to 1 ZIP code in San Luis. The related population figure in our data is approximately 28,810 people; it is not a count of people served citywide.
How much does it cost to fix water issues in San Luis?
Estimated remediation cost per household in San Luis: $600; modeled range $300 to $1,500. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
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How to cite this page

APA ZipCheckup. (2026). San Luis, AZ: 3 Health Violations - Home Safety 77/100. https://zipcheckup.com/cities/az/san-luis/
BibTeX 
@misc{zipcheckup-cities-az-san-luis,
  author = {{ZipCheckup}},
  title  = {{San Luis, AZ: 3 Health Violations - Home Safety 77/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/az/san-luis/}
}

Page version: October 2026.

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