Nevada County, California
13 ZIP codes · Avg score 79/100 · Grade B · Updated
ZipCheckup grade for Nevada County: B.
This ZIP looks solid, with a few items worth a quick check.
Nevada County's tap water quality puts it in the upper tier nationally; the 13 ZIP codes here record few health-based violations.
How Nevada County Compares
How Nevada County Compares
Nevada County scores 3 points above the California state average (76/100) and 6 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: Nevada County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 10.2%, diabetes 11.5%)
Estimated additional annual cost per homeowner: $2,125, driven primarily by wildfire
65.7% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Nevada County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 2 violations. Past 5 years: 3 total (3 health-based).
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: $2,125
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
54,240 housing units in Nevada 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 Nevada County
Remediation costs are relatively manageable for most homeowners in Nevada 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 Nevada County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Nevada County
8 community water systems serving Nevada County.
- C
- B
- C
- B
- B
- B
Show all 8 water systems
- C
- B
12 total water systems serve Nevada County.
Systems with the most violations in Nevada County
1 water system with recorded EPA violations.
- B
All ZIP Codes in Nevada County
13 ZIP codes tracked in Nevada County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95945 | Grass Valley | 83 | B | 1 (1 health) | $497K |
| 2 | 95946 | Penn Valley | 83 | B | 0 | $534K |
| 3 | 95949 | Grass Valley | 83 | B | 0 | $552K |
| 4 | 96161 | Truckee | 67 | C | 0 | $922K |
| 5 | 95712 | Chicago Park | — | — | — | |
| 6 | 95724 | Norden | — | — | — | |
| 7 | 95924 | Cedar Ridge | — | — | — | |
| 8 | 95959 | Nevada City | — | — | 1 (1 health) | $603K |
| 9 | 95960 | North San Juan | — | — | 0 | $283K |
| 10 | 95975 | Rough And Ready | — | — | 0 | $582K |
| 11 | 95986 | Washington | — | — | — | |
| 12 | 96111 | Floriston | — | — | — | |
| 13 | 96160 | Truckee | — | — | — |
Recommended Buyer Guides for Nevada County
Four sources - EPA, NSF, FEMA, CDC - drive the match.
- Best Lead Paint Test Kits — 65.7% of homes built before 1978
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Nevada County, California
Overview
Nevada County in California covers 13 tracked ZIP records with an average Home Safety Score of B (79/100) across 4 scored records.
2 of 7 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation 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.