CITY REPORT AZ HEALTH VIOLATIONS: 13

Sierra Vista, AZ: PFAS Found in Water - Home Safety 67/100

4 ZIP codes · 8 water systems · Updated

ZipCheckup grade for Sierra Vista: C.

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

Your top priority: match a filter's certification to the violations (13 health-based violations). NSF certified filters →

Sierra Vista, AZ holds a middle-tier grade; review the underlying water system records for the reasons behind it.

How Sierra Vista Compares

Sierra Vista67/100
Arizona avg66/100
National avg73/100

Data: EPA SDWIS

4
ZIP Codes
8
Water Systems
2
ZIPs Linked to Systems with Violations
C · 67
Avg Safety Score
Zone 2
County Radon Potential (Moderate)
$306K
Median Home Value
$1,100
Est. Remediation (0.4% of home value)

What You Should Know About Sierra Vista Water

  • Your city's water systems recorded 241 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.004 mg/L.
  • Estimated remediation: $1,100 per household.
  • Health risk index (ZipCheckup composite of CDC data): 13.63.

Who Supplies Your Water in Sierra Vista

When a city is linked to 8 water systems, as Sierra Vista, AZ is in federal records, water in one neighborhood may come from a different system than in another. The 3 systems with the largest reported populations are shown below, and their compliance records are kept separately, so a violation logged for one does not describe the others.

Overview

We track home safety data for 4 ZIP codes in Sierra Vista, Arizona, covering 8 community water systems serving approximately 49,112 people. The EPA snapshots used for this build directly map water systems to 2 of 4 ZIP codes.

2 of 2 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 13 health-based violations appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for Sierra Vista: C (67/100)

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

Sierra Vista water systems draw from: Groundwater.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0040 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

4 of 4 ZIP records with known zones are 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
E. coli Microbiological 41 2
Lead and Copper Rule Revisions Treatment Technique 26 2
Lead and Copper Rule Treatment Technique 19 2
Public Notice Rule Reporting 19 2
Di(2-ethylhexyl) phthalate Organic 15 2

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
85635 C 229 10 Bella Vista City Water System
85650 C 227 8 Pueblo Del Sol Water Company

All ZIP Codes in Sierra Vista

Data Sources

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

Health Outcomes in Sierra Vista

10.4%
Asthma (US: 9.8%)
13.7%
Diabetes (US: 10.4%)
15.2%
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 10.4% ↑
Diabetes 13.7% ↑
Mental Health 15.2% ↑

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

Top Contaminants in Sierra Vista Water

E. coli 41 violations
Microbiological
Gastrointestinal illness, potentially fatal
Lead and Copper Rule Revisions 26 violations
Treatment Technique
Lead and Copper Rule 19 violations
Treatment Technique
Developmental delays in children, kidney damage

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

Cost Context: What Remediation Means for Sierra Vista Homeowners

Compared with typical property prices, the remediation estimate for Sierra Vista is small in percentage terms - at or under one percent.

Median Home Value
$306,400
Est. Remediation
$1,100
Remediation as % of home value 0.4%

Estimated remediation costs in Sierra Vista can be compared with local home values. The $600–$2,300 estimated range can be set against the median property value; actual costs vary by home. Home values are 0% above the Arizona average.

Lead Exposure Risk for Children in Sierra Vista

0.004
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.

Available area-level lead records for Sierra Vista do not determine the lead level at an individual tap. 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.

Historical NFIP Claim Context in Sierra Vista

17
Total FEMA Flood Claims
$8,866
Avg Reported Sum With Payment Data
33%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Sierra Vista contains 17 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $8,866. Among ZIP codes with claim records, 33% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

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. The $1,100 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

What You Can Do in Sierra Vista

  1. Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
  2. Install a certified water filter. For E. coli, listed in the water-quality records for Sierra Vista: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
  3. Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.

Deep Dive Reports

Detailed analysis for Sierra Vista, AZ

Frequently Asked Questions

What does the Home Safety Score mean for Sierra Vista, AZ?
Sierra Vista has an average Home Safety Score of 67/100 (Grade C) 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. 241 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 Sierra Vista?
EPA records list 241 EPA violations, including 13 health-based violations for Sierra Vista water systems. These water-system violations are shown for 4 mapped ZIP codes.
Does Sierra Vista water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Sierra Vista is 0.004 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 Sierra Vista compare to Arizona average?
Sierra Vista has an average Home Safety Score of 67/100, which is at or above the Arizona state average of 66/100 for the same model series.
How many water systems serve Sierra Vista?
Our records map 8 water systems to 4 ZIP codes in Sierra Vista. The related population figure in our data is approximately 49,112 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Sierra Vista?
Estimated remediation cost per household in Sierra Vista: $1,100; modeled range $600 to $2,300. 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). Sierra Vista, AZ: PFAS Found in Water - Home Safety 67/100. https://zipcheckup.com/cities/az/sierra-vista/
BibTeX 
@misc{zipcheckup-cities-az-sierra-vista,
  author = {{ZipCheckup}},
  title  = {{Sierra Vista, AZ: PFAS Found in Water - Home Safety 67/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/az/sierra-vista/}
}

Page version: October 2026.

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