ZipCheckup grade for 85739: B.

This ZIP has a few items worth a quick check.

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

Water Quality Report
B 71

Tucson, AZ (85739): PFAS Detected in Mapped Water Systems - 71/100

EPA data combined for 5 water systems mapped to this ZIP (largest mapped system: Lago Del Oro Water Company)

PFAS Detected

EPA records for the water systems mapped to 85739 in Tucson, AZ contain 12 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 71/100
Water Quality Concerns 12 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 18 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 12 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.
  • 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 18 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
Contaminant Summary
Violations on record (not health-based)
12 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 Consumer Confidence Report: source date or period is not present in ZipCheckup's accepted source record
B
ZIP-level Home Safety model score: 71 / 100
Bottom 46% of U.S. ZIP codes
5
Water Systems
18,132
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
Zone 2
County Radon Potential · Moderate
$394K
Median Home Value37% above state median ($287K)

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Score Breakdown

Overall Home Safety Score: 71/100

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
76/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
75/100
Observed

Required domains

Drinking water
88/100
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 (9) HIGH

Your Water System

ZIP code 85739 in Tucson, Arizona is mapped to the water system Lago Del Oro Water Company (EPA ID: AZ0411117). This system provides water to approximately 18,132 people from groundwater sources.

There are 5 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Lago Del Oro Water Company AZ0411117 18,132 Groundwater
Goodman Water Company AZ0411130 2,656 Groundwater
Gw Ocotillo Water - Catalina AZ0410171 1,168 Groundwater
Cs Los Cerros Water Company Inc. AZ0410128 2,613 Groundwater
Oro Valley Water Utility AZ0410164 42,316 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 Lago Del Oro Water Company (AZ0411117) 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 85739.

Detected compounds: PFPeA, PFHxA.

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 (7) MODERATE

Area data suggest possible HVAC concerns - talk to a local expert.

Call (844) 439-2761

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Cost & Community (8) 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 85739, 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 18 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 85739 safe to drink?

EPA SDWIS records 12 violations since 2021 across the water systems mapped to ZIP 85739 (primary system: Lago Del Oro Water Company), 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 85739's water come from?

The recorded water source for Lago Del Oro Water Company, a system mapped to ZIP code 85739, is Groundwater. This system serves approximately 18,132 people.

How does Tucson water compare to the national average?

Tucson's Home Safety Score ranks lower than 54% of U.S. ZIP codes, and at or above 57% within Arizona.

How can I get my water tested in Tucson?

If Lago Del Oro Water Company 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 85739?

85739 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.

Are there PFAS (forever chemicals) in 85739's water?

Yes, PFAS have been detected in samples from water systems mapped to 85739. 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 85739?

FEMA records contain 18 flood insurance claims filed in ZIP code 85739; the recorded rated-zone value (the most frequent one if there are several claims) is AE, 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 (85739): PFAS Detected in Mapped Water Systems - 71/100. https://zipcheckup.com/report/85739/
BibTeX 
@misc{zipcheckup-report-85739,
  author = {{ZipCheckup}},
  title  = {{Tucson, AZ (85739): PFAS Detected in Mapped Water Systems - 71/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/85739/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 85739

ZIP Code City, State Distance Grade Violations
85738 Catalina, AZ 3.3 mi N/A 0
85737 Tucson, AZ 4.7 mi C 76
85755 Tucson, AZ 5.7 mi C 41
85619 Mount Lemmon, AZ 9.8 mi N/A 18
85704 Tucson, AZ 10.3 mi C 129
85718 Tucson, AZ 10.7 mi C 100
85742 Tucson, AZ 10.8 mi D 101
85623 Oracle, AZ 10.9 mi B 0
85741 Tucson, AZ 11.9 mi D 109
85750 Tucson, AZ 12.0 mi B 39

Contaminants Detected in 85739

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Overall safety breakdown

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