Chino Hills, CA: 1 Violation - Home Safety 58/100
1 ZIP code · 3 water systems · Updated
ZipCheckup grade for Chino Hills: C.
A mixed picture - some signals here are worth your attention.
Chino Hills lands near the CA median for water safety - compliance results are mixed, and the city's middle-grade standing reflects genuine variability across service areas rather than one problem driving the whole picture.
How Chino Hills Compares
Data: EPA SDWIS
Key Facts for Chino Hills Residents
- Your city's water systems recorded 1 violation in the past 5 years.
- Average lead level: 0.0021 mg/L.
- Homes built before 1986: 36% - older plumbing may contain lead solder.
- Estimated remediation: $2,200 per household.
- CDC health risk index: 11.58.
Chino Hills's Water Providers
At present, 3 utilities serve the bulk of Chino Hills, CA's residential water connections out of 3 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
- C
- C
- C
Overview
We track home safety data for 1 ZIP code in Chino Hills, California (population ~78,200), covering 3 community water systems serving approximately 314,562 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Chino Hills: C (58/100)
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
Chino Hills water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0021 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 91709 | C | 1 | 0 | City of Chino Hills, |
All ZIP Codes in Chino Hills
- 91709 [C] - 1 violation
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.
Chino Hills Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Chino Hills's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Chino Hills Infrastructure Age
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
With a median build year of 1999, Chino Hills's housing stock reflects a city built across multiple eras. A substantial share of homes predate 1986 - the year lead solder in plumbing was federally banned - meaning the risk from plumbing materials is unevenly distributed across the city's neighborhoods and property types.
Most homes in Chino Hills were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Chino Hills
Equity impact data for Chino Hills lands in the favorable tier - remediation claims a small slice of what properties here are worth.
Remediation costs in Chino Hills are relatively low compared to home values. The $1,200–$3,400 estimated range is a small fraction of median property value. Home values are 12% above the California average.
Chino Hills: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
After the federal action removing lead-bearing solder from new plumbing took effect, building practice shifted - but 36% of the Chino Hills inventory predates that line. With aggregate samples near or beyond 0.015 mg/L, an in-home check moves out of the optional column into the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Chino Hills: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Chino Hills contains 3 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $3,724. Among ZIP codes with claim records, 0% 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 <strong>$2,200</strong> 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 Chino Hills
- Test your water at home. City-level data shows averages - your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Stage 1 DBP Rule can reduce the most common contaminant found in Chino Hills's water.
- Check your home's plumbing. With 36% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Chino Hills, CA