Fontana, CA: 1 Violation - Home Safety 75/100
5 ZIP codes · 4 water systems · Updated
ZipCheckup grade for Fontana: B.
This ZIP has a few items worth a quick check.
Looking at federal compliance records for Fontana, CA: the city earns a grade in the top two bands here, and each serving system's violation history can be reviewed individually for what lies behind it.
How Fontana Compares
Data: EPA SDWIS
Fontana Water: The Quick Version
- Water systems mapped to your city have 1 violation on record since 2021.
- Homes built before 1986: 45% - older plumbing may contain lead solder.
- Health risk index (ZipCheckup composite of CDC data): 11.58.
Water Systems Serving Fontana
Counting every public water system linked to Fontana, CA in federal data gives 4. The list below keeps the 3 largest by reported population served, a figure that covers each system's whole service area rather than the city alone. A household's own supplier is named on its water bill.
- B
- B
- B
Overview
We track home safety data for 5 ZIP codes in Fontana, California (population ~235,632), covering 4 community water systems serving approximately 556,322 people region-wide. The EPA snapshots used for this build directly map water systems to 3 of 5 ZIP codes.
1 of 3 ZIP codes with a reported violation count in the available EPA record (33%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Fontana: B (75/100)
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
Fontana water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: reported as 0 mg/L (a reported 0 is not proof of no lead; check the source record for its reporting limit) (EPA action level: 0.015 mg/L)
- 0 of 3 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 |
|---|---|---|---|
| Nitrate | Inorganic | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 92335 | B | 1 | 0 | San Gabriel Valley Wc - Fontana |
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 92336 | B | San Gabriel Valley Wc - Fontana | 237,700 |
| 92337 | B | San Gabriel Valley Wc - Fontana | 237,700 |
All ZIP Codes in Fontana
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 Fontana
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 Fontana
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Fontana's Housing Stock?
With 45% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
A citywide median of 1983 for construction says little about any single address in Fontana. Homes built before 1986, when federal amendments restricted the lead content allowed in new pipe, solder and flux, may contain plumbing materials with more lead, and later renovations may have replaced them. An inspection of the plumbing can identify the materials, and sending a tap water sample to an accredited laboratory measures lead.
Most homes in Fontana 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.
Protecting Children from Lead in Fontana
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.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Fontana
Historical NFIP data for Fontana contains 23 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $13,281. Among ZIP codes with claim records, 50% 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.
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.
Deep Dive Reports
Detailed analysis for Fontana, CA