ZipCheckup grade for 85374: 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

Health Violations Found
C 59

Surprise, AZ (85374): 2 Health-Based Violations Recorded for Mapped Water Systems - 59/100

EPA data combined for 3 water systems mapped to this ZIP (largest mapped system: Epcor - Agua Fria)

Health Violations Found PFAS Detected

Health-based violation records by water system:

EPA records for the water systems mapped to 85374 in Surprise, AZ contain 67 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

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 59/100
Water Quality Issues 2 health-based violation records
Lead Risk Below action level Below the reporting limit, 90th percentile, sample period ending 2024-12-31
NFIP Claim History N/A
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 2 health-based violations and 65 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.
Contaminant Summary
Health Violations
67 violations 2 health-based 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
C
ZIP-level Home Safety model score: 59 / 100
Bottom 18% of U.S. ZIP codes
3
Water Systems
127,718
People Served
2
Health Violations (since 2021)Median is 0
Surface water
Water Source
Zone 2
County Radon Potential · Moderate
$356K
Median Home Value24% above state median ($287K)

Get updates when new water-quality data is available for your area

Free alerts when new EPA data affects ZIP code 85374. No spam - just safety updates.

Unsubscribe anytime. We only send updates when your safety score changes. See our Privacy Policy.

Share Your Area Home Safety Score
Share on X Share on Facebook

Tip: You can also screenshot the card above to share it as an image.

See incorrect data? Let us know

Score Breakdown

Overall Home Safety Score: 59/100

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
2/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
50/100
Observed
Annual EPA AirData AQI
75/100
Observed

Required domains

Drinking water
51/100
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) CRITICAL

Your Water System

ZIP code 85374 in Surprise, Arizona is mapped to the water system Epcor - Agua Fria (EPA ID: AZ0407695). This system provides water to approximately 127,718 people from surface water sources.

There are 3 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Epcor - Agua Fria AZ0407695 127,718 Surface water
Surprise City of - Mountain Vista AZ0407500 40,007 Groundwater
City of El Mirage AZ0407091 39,884 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 Epcor - Agua Fria (AZ0407695) 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.

📊 EPA Safe Drinking Water · View source →

Compliance History

2021 2022 1 2023 2024 2025 1
Health-based (MCL/TT) Other violations

PFAS Contamination Detected

PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 85374.

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.

📊 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 (10) HIGH
Home & Infrastructure (7) MODERATE

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

Call (844) 439-2761

This is a free service. You will be connected with an independent service provider. We may receive compensation.

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 Surprise

Based on local data for ZIP 85374, 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 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 85374 safe to drink?

EPA SDWIS records 67 violations since 2021 across the water systems mapped to ZIP 85374 (primary system: Epcor - Agua Fria), 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 85374's water come from?

The recorded water source for Epcor - Agua Fria, a system mapped to ZIP code 85374, is Surface water. This system serves approximately 127,718 people.

How does Surprise water compare to the national average?

Surprise's Home Safety Score ranks lower than 82% of U.S. ZIP codes, and lower than 72% of ZIP codes within Arizona.

How can I get my water tested in Surprise?

If Epcor - Agua Fria 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 85374?

85374 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 85374's water?

Yes, PFAS have been detected in samples from water systems mapped to 85374. 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

APA ZipCheckup. (2026). Surprise, AZ (85374): 2 Health-Based Violations Recorded for Mapped Water Systems - 59/100. https://zipcheckup.com/report/85374/
BibTeX 
@misc{zipcheckup-report-85374,
  author = {{ZipCheckup}},
  title  = {{Surprise, AZ (85374): 2 Health-Based Violations Recorded for Mapped Water Systems - 59/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/85374/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 85374

ZIP Code City, State Distance Grade Violations
85378 Surprise, AZ <1 mi C 77
85335 El Mirage, AZ 1.6 mi C 65
85373 Sun City, AZ 2.1 mi C 17
85376 Sun City West, AZ 2.3 mi N/A 0
85379 Surprise, AZ 3.1 mi C 49
85363 Youngtown, AZ 3.2 mi B 0
85351 Sun City, AZ 3.4 mi B 8
85372 Sun City, AZ 4.1 mi N/A 0
85375 Sun City West, AZ 4.3 mi B 12
85380 Peoria, AZ 6.4 mi N/A 0

Contaminants Detected in 85374

Learn more about the contaminants found in your water supply:

Overall safety breakdown

Home Safety Score →

Find the right water filter

Water Filter Matcher →

Compare filters, tests & services

Compare My Options →

Compare with another ZIP

Compare Tool →
Coverage: 14/17 risk factors Data sources →
Get alerts for 85374