ZipCheckup grade for 85378: 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
Surprise, AZ (85378): PFAS Detected in Mapped Water Systems - 58/100
EPA data combined for 5 water systems mapped to this ZIP (largest mapped system: City of El Mirage)
Health-based violation records by water system:
EPA records for the water systems mapped to 85378 in Surprise, AZ contain 77 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 2 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 2 health-based violations and 75 non-health-based (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.
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For Surprise (85378), a single critical-level condition heads the record, followed by 1 separate high-priority finding.
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
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) CRITICAL
Your Water System
ZIP code 85378 in Surprise, Arizona is mapped to the water system City of El Mirage (EPA ID: AZ0407091). This system provides water to approximately 39,884 people from groundwater sources.
There are 5 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| City of El Mirage | AZ0407091 | 39,884 | Groundwater |
| Epcor - Sun City | AZ0407099 | 38,016 | Groundwater |
| Epcor - Sun City West | AZ0407150 | 25,796 | Groundwater |
| Epcor - Agua Fria | AZ0407695 | 127,718 | Surface water |
| Epcor - North East Agua Fria | AZ0407531 | 14,723 | 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
- 85374 (Surprise) - <1 mi - 67 violations recorded for mapped water systems
- 85335 (El Mirage) - 2 mi - 65 violations recorded for mapped water systems
- 85373 (Sun City) - 2 mi - 17 violations recorded for mapped water systems
- 85376 (Sun City West) - 2 mi
- 85379 (Surprise) - 3 mi - 49 violations recorded for mapped water systems
- 85363 (Youngtown) - 3 mi
- 85351 (Sun City) - 4 mi - 8 violations recorded for mapped water systems
- 85372 (Sun City) - 4 mi
- 85375 (Sun City West) - 4 mi - 12 violations recorded for mapped water systems
- 85380 (Peoria) - 7 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of El Mirage (AZ0407091) on EPA.gov.
4 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.
Compliance History
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 85378.
Detected compounds: PFPeA, PFBS, PFHxA, PFOA.
Highest measured level: 0.01 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) HIGH
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.
Protect Your Home in Surprise
Based on local data for ZIP 85378, 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 85378 safe to drink?
EPA SDWIS records 77 violations since 2021 across the water systems mapped to ZIP 85378 (primary system: City of El Mirage), including 2 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 85378's water come from?
The recorded water source for City of El Mirage, a system mapped to ZIP code 85378, is Groundwater. This system serves approximately 39,884 people.
How does Surprise water compare to the national average?
Surprise'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 Surprise?
If City of El Mirage 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 85378?
85378 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Maricopa 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 85378's water?
Yes, PFAS have been detected in samples from water systems mapped to 85378. 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). Surprise, AZ (85378): PFAS Detected in Mapped Water Systems - 58/100. https://zipcheckup.com/report/85378/
@misc{zipcheckup-report-85378,
author = {{ZipCheckup}},
title = {{Surprise, AZ (85378): PFAS Detected in Mapped Water Systems - 58/100}},
year = {2026},
url = {https://zipcheckup.com/report/85378/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 85378
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 85374 | Surprise, AZ | <1 mi | C | 67 |
| 85335 | El Mirage, AZ | 1.6 mi | C | 65 |
| 85373 | Sun City, AZ | 2.1 mi | C | 17 |
| 85376 | Sun City West, AZ | 2.2 mi | N/A | 0 |
| 85379 | Surprise, AZ | 3.0 mi | C | 49 |
| 85363 | Youngtown, AZ | 3.3 mi | B | 0 |
| 85351 | Sun City, AZ | 3.5 mi | B | 8 |
| 85372 | Sun City, AZ | 4.2 mi | N/A | 0 |
| 85375 | Sun City West, AZ | 4.2 mi | B | 12 |
| 85380 | Peoria, AZ | 6.5 mi | N/A | 0 |
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