ZipCheckup grade for 85736: B.
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Your top priority: use a filter certified to reduce PFAS; check which ones. Check your ZIP → EPA PFAS info
Tucson, AZ (85736): PFAS Detected in Mapped Water Systems - 70/100
EPA data combined for 6 water systems mapped to this ZIP (largest mapped system: City of Tucson)
EPA records for the water systems mapped to 85736 in Tucson, AZ contain 42 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
At a Glance
- Water EPA records for water systems mapped to this ZIP show 42 violations (non-health) (since 2021).
- Lead The reported 90th-percentile lead result of 0.0006 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.
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With no critical conditions on file, the 1 high-priority alert represent the top tier for Tucson (85736).
Score Breakdown
Overall Home Safety Score: 70/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
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 85736 in Tucson, Arizona is mapped to the water system City of Tucson (EPA ID: AZ0410112). This system provides water to approximately 732,906 people from groundwater sources.
There are 6 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| City of Tucson | AZ0410112 | 732,906 | Groundwater |
| Gw Ocotillo Water - Valley View Acres | AZ0410158 | 496 | Groundwater |
| Gw Ocotillo Water - Diamond Bell | AZ0410159 | 706 | Groundwater |
| Thim Water Company 2 | AZ0410264 | 247 | Groundwater |
| Metropolitan Dwid - E&t System | AZ0410046 | 880 | Groundwater |
Other Water Quality Reports in Arizona
- 85001 (Phoenix)
- 85002 (Phoenix)
- 85003 (Phoenix) - 3 violations recorded for mapped water systems
- 85004 (Phoenix) - 3 violations recorded for mapped water systems
- 85005 (Phoenix)
- 85006 (Phoenix) - 3 violations recorded for mapped water systems
- 85007 (Phoenix) - 3 violations recorded for mapped water systems
- 85008 (Phoenix) - 3 violations recorded for mapped water systems
- 85009 (Phoenix) - 3 violations recorded for mapped water systems
- 85010 (Phoenix)
- 85011 (Phoenix)
- 85012 (Phoenix) - 3 violations recorded for mapped water systems
- 85013 (Phoenix) - 3 violations recorded for mapped water systems
- 85014 (Phoenix) - 3 violations recorded for mapped water systems
- 85015 (Phoenix) - 3 violations recorded for mapped water systems
- 85016 (Phoenix) - 3 violations recorded for mapped water systems
- 85017 (Phoenix) - 3 violations recorded for mapped water systems
- 85018 (Phoenix) - 8 violations recorded for mapped water systems
- 85019 (Phoenix) - 3 violations recorded for mapped water systems
- 85020 (Phoenix) - 3 violations recorded for mapped water systems
Nearby Water Quality Reports
- 85735 (Tucson) - 13 mi - 33 violations recorded for mapped water systems
- 85622 (Green Valley) - 18 mi - 9 violations recorded for mapped water systems
- 85601 (Arivaca) - 22 mi
- 85629 (Sahuarita) - 22 mi - 47 violations recorded for mapped water systems
- 85614 (Green Valley) - 22 mi - 22 violations recorded for mapped water systems
- 85645 (Amado) - 22 mi - 14 violations recorded for mapped water systems
- 85757 (Tucson) - 23 mi - 43 violations recorded for mapped water systems
- 85746 (Tucson) - 25 mi - 33 violations recorded for mapped water systems
- 85639 (Topawa) - 27 mi
- 85646 (Tubac) - 28 mi - 11 violations recorded for mapped water systems
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of Tucson (AZ0410112) 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.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 85736.
Detected compounds: PFBA.
Highest measured level: 0.0081 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.
Health Risks from Detected Contaminants
Radium-226
High RiskEPA 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 →
Radium-228
High RiskEPA 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 →
Environmental Hazards (10) CRITICAL
Home & Infrastructure (6) OK
Cost & Community (8) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Tucson
Based on local data for ZIP 85736, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
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 NeedsService 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 85736 safe to drink?
EPA SDWIS records 42 violations since 2021 across the water systems mapped to ZIP 85736 (primary system: City of Tucson), 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 85736's water come from?
The recorded water source for City of Tucson, a system mapped to ZIP code 85736, is Groundwater. This system serves approximately 732,906 people.
How does Tucson water compare to the national average?
Tucson's Home Safety Score ranks lower than 55% of U.S. ZIP codes, and at or above 54% within Arizona.
How can I get my water tested in Tucson?
If City of Tucson 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 85736 tap water?
The Lead and Copper Rule record selected for 85736 reports a 90th-percentile lead result of 0.000649 mg/L for a water system mapped to this ZIP (record date 2023-12-31). 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 85736?
85736 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 85736's water?
Yes, PFAS have been detected in samples from water systems mapped to 85736. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
How to cite this page
ZipCheckup. (2026). Tucson, AZ (85736): PFAS Detected in Mapped Water Systems - 70/100. https://zipcheckup.com/report/85736/
@misc{zipcheckup-report-85736,
author = {{ZipCheckup}},
title = {{Tucson, AZ (85736): PFAS Detected in Mapped Water Systems - 70/100}},
year = {2026},
url = {https://zipcheckup.com/report/85736/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 85736
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 85735 | Tucson, AZ | 13.3 mi | B | 33 |
| 85622 | Green Valley, AZ | 18.0 mi | B | 9 |
| 85601 | Arivaca, AZ | 21.8 mi | N/A | 0 |
| 85629 | Sahuarita, AZ | 21.9 mi | C | 47 |
| 85614 | Green Valley, AZ | 21.9 mi | D | 22 |
| 85645 | Amado, AZ | 22.5 mi | N/A | 14 |
| 85757 | Tucson, AZ | 22.7 mi | C | 43 |
| 85746 | Tucson, AZ | 25.1 mi | B | 33 |
| 85639 | Topawa, AZ | 27.4 mi | N/A | 0 |
| 85646 | Tubac, AZ | 27.6 mi | N/A | 11 |
Nearby ZIP Code Reports
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Overall safety breakdown
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