ZipCheckup grade for 85143: C.

A mixed picture - some signals here are worth your attention.

Water Quality Report
C 65

San Tan Valley, AZ (85143): 32 Violations Recorded for Mapped Water Systems - 65/100

EPA data for Epcor - San Tan

EPA records for the water systems mapped to 85143 in San Tan Valley, AZ contain 32 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources
Latest air quality, EPA records and weather alerts Current data temporarily unavailable
Current EPA violation data unavailable
Water records and current conditions
Current EPA violation data unavailable
Safety Score
C 65/100
Water Quality Concerns 32 non-health-based violation records in EPA data
Lead Risk Below action level Below the reporting limit, 90th percentile, sample period ending 2024-12-31
NFIP Claim History Claim records 2 claims
Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

  • Water EPA records for water systems mapped to this ZIP show 32 violations (non-health) (since 2021).
  • Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
  • Radon EPA Zone 2 - county-level radon potential, not a home measurement.
  • Flood 2 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
Contaminant Summary
Violations on record (not health-based)
32 violations
Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record Consumer Confidence Report: source date or period is not present in ZipCheckup's accepted source record
C
ZIP-level Home Safety model score: 65 / 100
Bottom 25% of U.S. ZIP codes
1
Water System
87,435
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
Zone 2
County Radon Potential · Moderate
$351K
Median Home Value22% above state median ($287K)

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Score Breakdown

Overall Home Safety Score: 65/100

This is the published model score. Component and domain values are shown independently; they are not added together on this page.

Canonical components

EPA water compliance
38/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
75/100
Observed

Required domains

Drinking water
69/100
Indoor environment
50/100
Outdoor environment
75/100

Coverage: 4 of 4 components and 3 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (7) MODERATE

Your Water System

ZIP code 85143 in San Tan Valley, Arizona is mapped to the water system Epcor - San Tan (EPA ID: AZ0411128). This system provides water to approximately 87,435 people from groundwater sources.

Other Water Quality Reports in Arizona

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Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Epcor - San Tan (AZ0411128) on EPA.gov.

2 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →

UCMR 5 PFAS monitoring: no reportable detections in available records

Available federal UCMR5 records for water systems mapped to ZIP code 85143 show no PFAS detections among the compounds tested, at the program's reporting levels.

The EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5) required community and non-transient non-community water systems serving 3,300 or more people to test for 29 PFAS compounds and lithium between 2023 and 2025. Systems with no detections at the federal minimum reporting level had no results at or above that reporting level.

📊 EPA UCMR5 · View source →
Environmental Hazards (11) HIGH
Home & Infrastructure (6) OK
Cost & Community (9) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Protect Your Home in San Tan Valley

Based on local data for ZIP 85143, these services may benefit homeowners in your area.

Based on local data for your area. Use the tools below to explore your options.

Home & Flood Insurance

The ZIP code for this report in San Tan Valley has 2 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.

Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote

Check Your Flood Zone (Free)

FEMA flood map lookup - see if your property is in a flood zone

Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)

Roofing Inspection & Repair

Active weather alerts in Arizona increase the risk of roof damage from hail and high winds. A professional inspection can identify vulnerabilities.

Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500

Estimate Your Home Insurance Needs

Service recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.

Frequently Asked Questions

Is the tap water in 85143 safe to drink?

EPA SDWIS records 32 violations since 2021 across the water systems mapped to ZIP 85143 (primary system: Epcor - San Tan), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.

Where does 85143's water come from?

The recorded water source for Epcor - San Tan, a system mapped to ZIP code 85143, is Groundwater. This system serves approximately 87,435 people.

How does San Tan Valley water compare to the national average?

San Tan Valley's Home Safety Score ranks lower than 75% of U.S. ZIP codes, and lower than 68% of ZIP codes within Arizona.

How can I get my water tested in San Tan Valley?

If Epcor - San Tan supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.

What is the radon risk for 85143?

85143 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Pinal County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

What does the NFIP claim history show for ZIP 85143?

FEMA records contain 2 flood insurance claims filed in ZIP code 85143; the recorded rated-zone value (the most frequent one if there are several claims) is C, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.

How to cite this page

APA ZipCheckup. (2026). San Tan Valley, AZ (85143): 32 Violations Recorded for Mapped Water Systems - 65/100. https://zipcheckup.com/report/85143/
BibTeX 
@misc{zipcheckup-report-85143,
  author = {{ZipCheckup}},
  title  = {{San Tan Valley, AZ (85143): 32 Violations Recorded for Mapped Water Systems - 65/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/85143/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 85143

ZIP Code City, State Distance Grade Violations
85140 San Tan Valley, AZ <1 mi C 35
85240 Queen Creek, AZ 2.0 mi N/A 0
85243 Queen Creek, AZ 2.9 mi N/A 0
85142 Queen Creek, AZ 7.3 mi D 215
85127 Chandler Heights, AZ 9.9 mi N/A 0
85298 Gilbert, AZ 10.9 mi D 278
85227 Chandler Heights, AZ 11.9 mi N/A 0
85297 Gilbert, AZ 12.1 mi D 174
85212 Mesa, AZ 12.2 mi D 203
85236 Higley, AZ 12.4 mi D 174

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