Madera, CA: 1 Violation - Home Safety 83/100
4 ZIP codes · 7 water systems · Updated
ZipCheckup grade for Madera: B.
This ZIP has a few items worth a quick check.
In ZipCheckup's scoring, Madera, CA lands in the A-B grade tier.
How Madera Compares
Data: EPA SDWIS
What You Should Know About Madera Water
- Water systems mapped to your city have 1 violation on record since 2021.
- Average of reported 90th-percentile lead results: 0.004 mg/L.
- Homes built before 1986: 46% - older plumbing may contain lead solder.
- Health risk index (ZipCheckup composite of CDC data): 13.1.
Who Supplies Your Water in Madera
Federal records list 7 water systems tied to Madera, CA. Of those, 3 are the primary providers, meaning service conditions, rate structures, and compliance histories can differ depending on where a property sits.
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Overview
We track home safety data for 4 ZIP codes in Madera, California, covering 7 community water systems serving approximately 108,557 people. The EPA snapshots used for this build directly map water systems to 3 of 4 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 Madera: B (83/100)
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
Madera water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0040 mg/L (EPA action level: 0.015 mg/L)
- 0 of 3 ZIP codes with known status exceed the EPA lead action level
Radon Risk
4 of 4 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 |
|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 93637 | B | 1 | 0 | City of Madera |
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 93636 | B | Madera Company Md10a-madera Ranchos | 3,172 |
| 93638 | B | City of Madera | 66,560 |
All ZIP Codes in Madera
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 Madera
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 Madera Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Madera
With 46% 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
Homes on the same street in Madera can differ: one may keep original pre-1986 plumbing while another has been replumbed, so the 1987 median is only a starting point.
Most homes in Madera 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.
Lead Exposure Risk for Children in Madera
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 NFIP Claim Context in Madera
Historical NFIP data for Madera contains 30 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $4,396. 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.
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 Madera, CA