Corona, CA: 1 Health Violation - Home Safety 71/100
7 ZIP codes · 11 water systems · Updated
ZipCheckup grade for Corona: B.
This ZIP has a few items worth a quick check.
In ZipCheckup's scoring, Corona, CA lands in the A-B grade tier.
How Corona Compares
Data: EPA SDWIS
Water Quality Map: Corona, CA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
How ZIP codes in Corona score across all safety grades.
What You Should Know About Corona Water
- Your city's water systems recorded 51 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0037 mg/L.
- Homes built before 1986: 30% - older plumbing may contain lead solder.
- Estimated remediation: $543 per household.
- Health risk index (ZipCheckup composite of CDC data): 12.09.
Who Supplies Your Water in Corona
Multiple utilities show up for Corona, CA: 3 are listed here out of 11 tracked federally.
- B
- B
- B
Overview
We track home safety data for 7 ZIP codes in Corona, California (population ~262,651), covering 11 community water systems serving approximately 995,913 people region-wide. The EPA snapshots used for this build directly map water systems to 5 of 7 ZIP codes.
5 of 5 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 1 health-based violation appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Corona: B (71/100)
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
Corona water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0037 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
7 of 7 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 |
|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 9 | 5 |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 8 | 5 |
| Lead and Copper Rule | Treatment Technique | 4 | 3 |
| Arsenic | Inorganic | 2 | 1 |
| Barium | Inorganic | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 92880 | C | 46 | 1 | Jurupa Community Sd |
| 92883 | B | 7 | 0 | Temescal Valley Water District |
| 92881 | B | 3 | 0 | City of Corona, |
| 92879 | B | 2 | 0 | City of Corona, |
| 92882 | B | 2 | 0 | City of Corona, |
All ZIP Codes in Corona
- 92877
- 92878
- 92879 [B] - 2 violations
- 92880 [C] - 46 violations ⚠
- 92881 [B] - 3 violations
- 92882 [B] - 2 violations
- 92883 [B] - 7 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.
Health Outcomes in Corona
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
Top Contaminants in Corona Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Corona
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
For a household in Corona, a certified lab test of tap water answers what the median build year of 1995 cannot.
Most homes in Corona 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.
Cost Context: What Remediation Means for Corona Homeowners
Relative to home values, Corona remediation estimates run low.
Estimated remediation costs in Corona can be compared with local home values. The $321–$886 estimated range can be set against the median property value; actual costs vary by home. Home values are 9% below the California average.
Lead Exposure Risk for Children in Corona
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.
Homes built before 1986 are more likely to have lead pipes, fixtures or solder, and census figures put that share of Corona housing at about 30%. The lead figure used here, an average of ZIP-level 90th-percentile results, sits under 0.010 mg/L. Neither number shows what flows from a particular family's faucet; a test of that faucet is the only direct measure.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical NFIP Claim Context in Corona
Historical NFIP data for Corona contains 69 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $25,239. Among ZIP codes with claim records, 60% 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 $543 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.
Deep Dive Reports
Detailed analysis for Corona, CA