ZipCheckup grade for 85737: C.

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

Your top priority: use a filter certified to reduce PFAS; check which ones. Check your ZIP → EPA PFAS info

Water Quality Report
C 58

Tucson, AZ (85737): PFAS Detected in Mapped Water Systems - 58/100

EPA data combined for 4 water systems mapped to this ZIP (largest mapped system: Oro Valley Water Utility)

PFAS Detected

EPA records for the water systems mapped to 85737 in Tucson, AZ contain 76 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 58/100
Water Quality Concerns 76 non-health-based violation records in EPA data
Lead Risk Below action level 0.001 mg/L, 90th percentile, sample period ending 2025-12-31
NFIP Claim History Claim records 15 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 76 violations (non-health) (since 2021).
  • Lead The reported 90th-percentile lead result of 0.001 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
  • PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
  • Radon EPA Zone 2 - county-level radon potential, not a home measurement.
  • Flood 15 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
Contaminant Summary
Violations on record (not health-based)
76 violations PFAS detected 2 risks identified
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
C
ZIP-level Home Safety model score: 58 / 100
Bottom 15% of U.S. ZIP codes
4
Water Systems
42,316
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
0.001 mg/L
Reported Lead ResultBelow the national median of system results
Zone 2
County Radon Potential · Moderate
$434K
Median Home Value51% above state median ($287K)

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Score Breakdown

Overall Home Safety Score: 58/100

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
0/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
75/100
Observed

Required domains

Drinking water
50/100
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 (8) HIGH

Your Water System

ZIP code 85737 in Tucson, Arizona is mapped to the water system Oro Valley Water Utility (EPA ID: AZ0410164). This system provides water to approximately 42,316 people from groundwater sources.

There are 4 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Oro Valley Water Utility AZ0410164 42,316 Groundwater
Metropolitan Dwid AZ0410076 45,570 Groundwater
Cs Los Cerros Water Company Inc. AZ0410128 2,613 Groundwater
Lago Del Oro Water Company AZ0411117 18,132 Groundwater

Other Water Quality Reports in Arizona

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Oro Valley Water Utility (AZ0410164) 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 →

PFAS Contamination Detected

PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 85737.

Detected compounds: PFPeA, PFBS, PFHxA, PFHxS.

Highest measured level: 0.0065 µg/L

Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.

📊 EPA UCMR5 · View source →

Health Risks from Detected Contaminants

Radium-226

High Risk

EPA reference value: 5 pCi/L (MCL for combined Radium-226 & 228)

Increased cancer risk, including bone cancer (known carcinogen)

At-risk groups: people who drink water with radium above the MCL over many years

Treatment options (verify a product is certified to reduce this contaminant): ion exchange (water softener), reverse osmosis, lime softening · Find a filter →

Learn more about Radium-226 in drinking water →

Radium-228

High Risk

EPA reference value: 5 pCi/L (MCL for combined Radium-226 & 228)

Increased cancer risk, including bone cancer (known carcinogen)

At-risk groups: people who drink water with radium above the MCL over many years

Treatment options (verify a product is certified to reduce this contaminant): ion exchange (water softener), reverse osmosis, lime softening · Find a filter →

Learn more about Radium-228 in drinking water →

📊 EPA SDWIS + SDWA · View source →
Environmental Hazards (11) CRITICAL
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 Tucson

Based on local data for ZIP 85737, 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 Tucson has 15 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 85737 safe to drink?

EPA SDWIS records 76 violations since 2021 across the water systems mapped to ZIP 85737 (primary system: Oro Valley Water Utility), 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 85737's water come from?

The recorded water source for Oro Valley Water Utility, a system mapped to ZIP code 85737, is Groundwater. This system serves approximately 42,316 people.

How does Tucson water compare to the national average?

Tucson's Home Safety Score ranks lower than 85% of U.S. ZIP codes, and lower than 83% of ZIP codes within Arizona.

How can I get my water tested in Tucson?

If Oro Valley Water Utility 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.

Is lead a concern in 85737 tap water?

The Lead and Copper Rule record selected for 85737 reports a 90th-percentile lead result of 0.001 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.

What is the radon risk for 85737?

85737 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.

Are there PFAS (forever chemicals) in 85737's water?

Yes, PFAS have been detected in samples from water systems mapped to 85737. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.

What does the NFIP claim history show for ZIP 85737?

FEMA records contain 15 flood insurance claims filed in ZIP code 85737; the recorded rated-zone value (the most frequent one if there are several claims) is X, 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). Tucson, AZ (85737): PFAS Detected in Mapped Water Systems - 58/100. https://zipcheckup.com/report/85737/
BibTeX 
@misc{zipcheckup-report-85737,
  author = {{ZipCheckup}},
  title  = {{Tucson, AZ (85737): PFAS Detected in Mapped Water Systems - 58/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/85737/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 85737

ZIP Code City, State Distance Grade Violations
85755 Tucson, AZ 1.9 mi C 41
85739 Tucson, AZ 4.7 mi B 12
85704 Tucson, AZ 5.7 mi C 129
85738 Catalina, AZ 6.5 mi N/A 0
85742 Tucson, AZ 6.9 mi D 101
85741 Tucson, AZ 7.2 mi D 109
85718 Tucson, AZ 7.3 mi C 100
85652 Cortaro, AZ 9.7 mi N/A 0
85750 Tucson, AZ 10.2 mi B 39
85705 Tucson, AZ 10.3 mi D 109

Contaminants Detected in 85737

Learn more about the contaminants found in your water supply:

Overall safety breakdown

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Coverage: 14/17 risk factors Data sources →
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