ZipCheckup grade for 85321: B.

This ZIP has a few items worth a quick check.

Your top priority: have older plumbing checked for lead solder. Check your ZIP → EPA: reduce lead

Water Quality Report
B 74

Ajo, AZ (85321): 1 Violation Recorded for Mapped Water Systems - 74/100

EPA data for Arizona Water Company - Ajo

EPA records for the water systems mapped to 85321 in Ajo, AZ contain 1 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
B 74/100
Water Quality Concerns 1 non-health-based violation record in EPA data
Lead Risk Below action level Below the reporting limit, 90th percentile, sample period ending 2026-12-31
NFIP Claim History Claim records 9 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 1 violation (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 9 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
Contaminant Summary
Violations on record (not health-based)
1 violation
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
B
ZIP-level Home Safety model score: 74 / 100
Bottom 49% of U.S. ZIP codes
1
Water System
2,100
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
Zone 2
County Radon Potential · Moderate
$121K
Median Home Value58% below state median ($287K)

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Score Breakdown

Overall Home Safety Score: 74/100

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
92/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
75/100
Observed

Required domains

Drinking water
96/100
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 (6) HIGH

Your Water System

ZIP code 85321 in Ajo, Arizona is mapped to the water system Arizona Water Company - Ajo (EPA ID: AZ0410003). This system provides water to approximately 2,100 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 Arizona Water Company - Ajo (AZ0410003) 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 →
Environmental Hazards (11) HIGH
Home & Infrastructure (6) MODERATE
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 Ajo

Based on local data for ZIP 85321, 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 Ajo has 9 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)

Gutter Installation & Repair

The median home in 85321 was built around 1967. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.

Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home

Estimate Your Home Maintenance Costs

Window Replacement

The median build year of homes in Ajo is 1967; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.

Typical cost: Window replacement: typically $300–$800 per window installed

Estimate Your Home Maintenance Costs

Roofing Inspection & Repair

Homes built around 1967 may be on their second or third roof. A professional inspection can catch damage before leaks start.

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 85321 safe to drink?

EPA SDWIS records 1 violation since 2021 across the water systems mapped to ZIP 85321 (primary system: Arizona Water Company - Ajo), 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 85321's water come from?

The recorded water source for Arizona Water Company - Ajo, a system mapped to ZIP code 85321, is Groundwater. This system serves approximately 2,100 people.

How does Ajo water compare to the national average?

Ajo's Home Safety Score ranks lower than 51% of U.S. ZIP codes, and at or above 73% within Arizona.

How can I get my water tested in Ajo?

If Arizona Water Company - Ajo 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 85321?

85321 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Pima 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 85321?

FEMA records contain 9 flood insurance claims filed in ZIP code 85321; the recorded rated-zone value (the most frequent one if there are several claims) is AO, 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). Ajo, AZ (85321): 1 Violation Recorded for Mapped Water Systems - 74/100. https://zipcheckup.com/report/85321/
BibTeX 
@misc{zipcheckup-report-85321,
  author = {{ZipCheckup}},
  title  = {{Ajo, AZ (85321): 1 Violation Recorded for Mapped Water Systems - 74/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/85321/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 85321

ZIP Code City, State Distance Grade Violations
85341 Lukeville, AZ 25.8 mi N/A 1
85634 Sells, AZ 40.3 mi N/A 0
85337 Gila Bend, AZ 48.7 mi B 10
85639 Topawa, AZ 56.4 mi N/A 0
85272 Stanfield, AZ 58.5 mi N/A 0
85172 Stanfield, AZ 60.3 mi B 4
85139 Maricopa, AZ 61.3 mi C 166
85333 Dateland, AZ 64.5 mi N/A 10
85239 Maricopa, AZ 65.3 mi N/A 0
85193 Casa Grande, AZ 66.0 mi N/A 25

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Coverage: 14/17 risk factors Data sources →
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