Merced County, California
22 ZIP codes · Avg score 89/100 · Grade A · Updated
ZipCheckup grade for Merced County: A.
No federal data flags a major home-safety concern for this ZIP.
Across Merced County's 22 ZIP codes, EPA compliance data shows above-average performance - violation rates are minimal, none of the county's systems have triggered health-based MCL exceedances in recent cycles, and the county's scores have stayed above the national baseline across every recent reporting period.
How Merced County Compares
How Merced County Compares
Merced County scores 13 points above the California state average (76/100) and 16 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: Merced County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.1 (asthma 9.8%, diabetes 13%)
Estimated additional annual cost per homeowner: $2,645, driven primarily by sea_level
59.8% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Merced County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 44 violations. Past 5 years: 92 total (92 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: $2,645
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
87,294 housing units in Merced 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 Merced County
Remediation costs are relatively manageable for most homeowners in Merced 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 Merced County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Merced County
8 community water systems serving Merced County.
- B
- A
- A
- A
- A
Show all 8 water systems
- A
- A
15 total water systems serve Merced County.
Systems with the most violations in Merced County
5 water systems with recorded EPA violations.
- A
- A
- A
All ZIP Codes in Merced County
22 ZIP codes tracked in Merced County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95324 | Hilmar | 100 | A | 14 (14 health) | $442K |
| 2 | 93620 | Dos Palos | 99 | A | 13 (12 health) | $295K |
| 3 | 93665 | South Dos Palos | 99 | A | 13 (12 health) | — |
| 4 | 93635 | Los Banos | 96 | A | 2 (1 health) | $424K |
| 5 | 95322 | Gustine | 96 | A | 2 (1 health) | $433K |
| 6 | 95334 | Livingston | 96 | A | 3 (1 health) | $346K |
| 7 | 95388 | Winton | 87 | A | 10 (3 health) | $308K |
| 8 | 95348 | Merced | 83 | B | 0 | $353K |
| 9 | 95340 | Merced | 79 | B | 2 (1 health) | $383K |
| 10 | 95341 | Merced | 79 | B | 2 (1 health) | $295K |
| 11 | 95365 | Planada | 79 | B | 2 (1 health) | $237K |
| 12 | 95301 | Atwater | 75 | B | 5 (2 health) | $368K |
| 13 | 93661 | Santa Rita Park | — | — | — | |
| 14 | 95303 | Ballico | — | — | $602K | |
| 15 | 95312 | Cressey | — | — | — | |
| 16 | 95315 | Delhi | — | — | 15 (14 health) | $338K |
| 17 | 95317 | El Nido | — | — | $396K | |
| 18 | 95333 | Le Grand | — | — | 11 (9 health) | $310K |
| 19 | 95343 | Merced | — | — | — | |
| 20 | 95344 | Merced | — | — | — | |
| 21 | 95369 | Snelling | — | — | 6 (2 health) | $351K |
| 22 | 95374 | Stevinson | — | — | $436K |
Recommended Buyer Guides for Merced County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 59.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Merced County, California
Overview
Merced County in California covers 22 tracked ZIP records with an average Home Safety Score of A (89/100) across 12 scored records.
14 of 15 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 41 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.