Madera County, California
13 ZIP codes · Avg score 76/100 · Grade B · Updated
ZipCheckup grade for Madera County: B.
This ZIP looks solid, with a few items worth a quick check.
Madera County's tap water quality puts it in the upper tier nationally; the 13 ZIP codes here record few health-based violations.
How Madera County Compares
How Madera County Compares
Madera County scores 0 points above the California state average (76/100) and 3 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Madera County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.1 (asthma 10.4%, diabetes 13.5%)
Estimated additional annual cost per homeowner: $2,200, driven primarily by wildfire
52.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Madera County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 22 violations. Past 5 years: 46 total (46 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,200
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
49,612 housing units in Madera County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Madera County
Remediation costs are relatively manageable for most homeowners in Madera County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Madera County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Madera County
8 community water systems serving Madera County.
- B
- C
- D
- B
- B
- B
Show all 8 water systems
- B
- B
12 total water systems serve Madera County.
Systems with the most violations in Madera County
2 water systems with recorded EPA violations.
- D
- B
All ZIP Codes in Madera County
13 ZIP codes tracked in Madera County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 93604 | Bass Lake | 83 | B | 0 | $1043K |
| 2 | 93636 | Madera | 83 | B | 0 | $483K |
| 3 | 93637 | Madera | 83 | B | 1 | $369K |
| 4 | 93638 | Madera | 83 | B | 0 | $292K |
| 5 | 93644 | Oakhurst | 83 | B | 0 | $378K |
| 6 | 93610 | Chowchilla | 67 | C | 0 | $342K |
| 7 | 93614 | Coarsegold | 52 | D | 17 (9 health) | $355K |
| 8 | 93601 | Ahwahnee | — | — | $393K | |
| 9 | 93639 | Madera | — | — | — | |
| 10 | 93643 | North Fork | — | — | $339K | |
| 11 | 93645 | O Neals | — | — | 0 | $367K |
| 12 | 93653 | Raymond | — | — | $518K | |
| 13 | 93669 | Wishon | — | — | $290K |
Recommended Buyer Guides for Madera County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Lead Paint Test Kits — 52.3% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Madera County, California
Overview
Madera County in California covers 13 tracked ZIP records with an average Home Safety Score of B (76/100) across 7 scored records.
2 of 8 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 9 health-based violations appear in the available health breakdown.
← Back to California Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.