Surprise, AZ: 2 Health Violations - Home Safety 62/100
5 ZIP codes · 9 water systems · Updated
ZipCheckup grade for Surprise: C.
A mixed picture - some signals here are worth your attention.
Neither high nor low, the composite grade for Surprise, AZ is a C, built from ZIP-level scores.
How Surprise Compares
Data: EPA SDWIS
Water Quality Map: Surprise, AZ
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Distribution of Home Safety grades across Surprise.
Surprise Water: The Quick Version
- Your city's water systems recorded 94 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0007 mg/L.
- Homes built before 1986: 7% - older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- Health risk index (ZipCheckup composite of CDC data): 11.3.
Water Systems Serving Surprise
Federal records list 9 water systems tied to Surprise, AZ. Of those, 3 are the primary providers, meaning service conditions, rate structures, and compliance histories can differ depending on where a property sits.
- C
- C
- C
Overview
We track home safety data for 5 ZIP codes in Surprise, Arizona (population ~154,234), covering 9 community water systems serving approximately 321,333 people region-wide. The EPA snapshots used for this build directly map water systems to 5 of 5 ZIP codes.
5 of 5 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 2 health-based violations appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Surprise: C (62/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Surprise water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0007 mg/L (EPA action level: 0.015 mg/L)
- 0 of 5 ZIP codes with known status exceed the EPA lead action level
Radon Risk
5 of 5 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Arsenic | Inorganic | 52 | 5 |
| 2,4-D | Organic | 36 | 5 |
| Lead and Copper Rule | Treatment Technique | 28 | 5 |
| Nitrate | Inorganic | 21 | 5 |
| Chlorine | Disinfectant | 16 | 3 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 85378 | C | 77 | 2 | City of El Mirage |
| 85374 | C | 67 | 2 | Epcor - Agua Fria |
| 85387 | C | 64 | 2 | Epcor - Agua Fria |
| 85379 | C | 49 | 2 | Surprise City of - Mountain Vista |
| 85388 | C | 47 | 2 | Epcor - Agua Fria |
All ZIP Codes in Surprise
- 85374 [C] - 67 violations ⚠
- 85378 [C] - 77 violations ⚠
- 85379 [C] - 49 violations ⚠
- 85387 [C] - 64 violations ⚠
- 85388 [C] - 47 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Surprise
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Surprise
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Surprise's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Median build year in Surprise: 2003; a tap test shows what your own water delivers.
Most homes in Surprise were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Surprise: Remediation Cost in Perspective
In Surprise, estimated remediation comes to 1% or less of the median home value.
Estimated remediation costs in Surprise can be compared with local home values. The $210–$760 estimated range can be set against the median property value; actual costs vary by home. Home values are 35% above the Arizona average.
Protecting Children from Lead in Surprise
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
For families with young children in Surprise, two area figures are available: pre-1986 construction at about 7%, and a mean of the ZIP codes' 90th-percentile lead results under 0.010 mg/L. Testing water from the tap a child drinks from gives a home-specific result.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Surprise
Historical NFIP data for Surprise contains 3 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $9,716. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $400 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Surprise
- Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
- Install a certified water filter. For Arsenic, listed in the water-quality records for Surprise: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Surprise, AZ