Corona, CA: 1 Health Violation - Home Safety 71/100
7 ZIP codes · 11 water systems · Updated
ZipCheckup grade for Corona: B.
This ZIP looks solid, with a few items worth a quick check.
Corona tap water earns a high safety grade - above-average compliance with CA and federal standards.
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 in the past 5 years.
- Average lead level: 0.0037 mg/L.
- Homes built before 1986: 30% - older plumbing may contain lead solder.
- Estimated remediation: $1,929 per household.
- CDC health risk index: 12.09 - above typical levels.
Who Supplies Your Water in Corona
Water supply in Corona, CA follows a divided structure: 3 utilities account for the largest share of residential service out of 11 total systems, each managing its own distribution network and EPA reporting. Because these systems operate independently, rate decisions and compliance outcomes are determined separately.
- 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 lead level (90th percentile): 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
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 7 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 9 | 5 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 8 | 5 |
| Stage 1 DBP Rule | Treatment Technique | 4 | 3 |
| Barium | Inorganic | 2 | 1 |
| Cadmium | 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). Water contamination can correlate with respiratory and chronic health conditions.
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 city with a median build year of 1995, Corona carries a housing profile that straddles the 1986 federal ban on lead solder in plumbing. Neither predominantly new nor predominantly old, the stock presents a moderate aggregate risk environment - with individual risk varying sharply depending on when and where a specific home was built.
Most homes in Corona 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.
Cost Context: What Remediation Means for Corona Homeowners
In Corona, property values comfortably outpace what documented remediation typically costs - the equity share is proportionally low.
Remediation costs in Corona are relatively low compared to home values. The $986–$3,086 estimated range is a small fraction of median property value. Home values are 9% below the California average.
Lead Exposure Risk for Children in Corona
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.
30% - that captures the slice of Corona stock built before federal rules removed lead-bearing solder from new construction. Combined with system samples below the regulatory action mark, the picture points to a quiet baseline, with one-home draws as the only direct read on a specific address.
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 <strong>$1,929</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.
Deep Dive Reports
Detailed analysis for Corona, CA