Placer County, California
31 ZIP codes · Avg score 69/100 · Grade C · Updated 2026-06-03
Safe water is the norm for most of Placer County's 31 ZIP codes — but a notable subset have documented violations that push the grade to the middle tier.
How Placer County Compares
How Placer County Compares
Placer County scores 4 points below the California state average (73/100) and 1 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Placer County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.2 (asthma 9.9%, diabetes 9.9%)
Estimated additional annual cost per homeowner: $1,623, driven primarily by flood
Infrastructure: 0.31% avg pipe failure probability, 3% of ZIPs at high risk
56.3% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↑ Worsening trendEPA violation counts by year across Placer County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 8 violations. Past 5 years: 12 total (12 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,623
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
172,227 housing units in Placer 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 Placer County
Remediation costs are relatively manageable for most homeowners in Placer 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 Placer County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Placer County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Placer Cwa - Foothill | 89,544 | 16 |
| 2 | Meadowbrook Oaks | 50 | 12 |
| 3 | City of Roseville | 155,612 | 9 |
| 4 | City of Lincoln | 54,538 | 7 |
| 5 | Foresthill Public Utility District | 6,782 | 4 |
51 total water systems serve Placer County.
All ZIP Codes in Placer County
31 ZIP codes tracked in Placer County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95604 | Auburn | 83 | B | 0 | — |
| 2 | 95658 | Newcastle | 83 | B | 0 | $814K |
| 3 | 95713 | Colfax | 83 | B | 1 | $480K |
| 4 | 95715 | Emigrant Gap | 83 | B | 0 | $374K |
| 5 | 95722 | Meadow Vista | 83 | B | 0 | $672K |
| 6 | 96148 | Tahoe Vista | 83 | B | 0 | $713K |
| 7 | 96162 | Truckee | 83 | B | 0 | — |
| 8 | 95703 | Applegate | 82 | B | 2 (1 health) | $644K |
| 9 | 96140 | Carnelian Bay | 79 | B | 4 (1 health) | $871K |
| 10 | 96145 | Tahoe City | 79 | B | 2 (1 health) | $981K |
| 11 | 95602 | Auburn | 78 | B | 0 | $647K |
| 12 | 95603 | Auburn | 78 | B | 0 | $614K |
| 13 | 95631 | Foresthill | 78 | B | 4 (1 health) | $507K |
| 14 | 95747 | Roseville | 78 | B | 1 | $653K |
| 15 | 95728 | Soda Springs | 77 | B | 1 (1 health) | $978K |
| 16 | 95678 | Roseville | 73 | B | 1 | $535K |
| 17 | 95746 | Granite Bay | 73 | B | 0 | $1058K |
| 18 | 95650 | Loomis | 70 | B | 0 | $783K |
| 19 | 95661 | Roseville | 68 | C | 1 | $668K |
| 20 | 95648 | Lincoln | 66 | C | 1 (1 health) | $635K |
| 21 | 96141 | Homewood | 63 | C | 0 | $1060K |
| 22 | 96146 | Olympic Valley | 60 | C | 0 | $1547K |
| 23 | 95614 | Cool | 53 | D | 0 | $490K |
| 24 | 95664 | Pilot Hill | 53 | D | 0 | $388K |
| 25 | 95701 | Alta | 53 | D | 0 | $512K |
| 26 | 95712 | Chicago Park | 53 | D | 0 | — |
| 27 | 95717 | Gold Run | 53 | D | 0 | $490K |
| 28 | 95736 | Weimar | 53 | D | 0 | — |
| 29 | 96143 | Kings Beach | 53 | D | 0 | $715K |
| 30 | 95677 | Rocklin | 49 | D | 6 (1 health) | $630K |
| 31 | 95765 | Rocklin | 45 | D | 6 (1 health) | $700K |
Recommended Buyer Guides for Placer County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Water Filters for Lead — Lead above EPA action level in 2 ZIP codes
- Best Lead Paint Test Kits — 56.3% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Placer County, California
Overview
Placer County in California covers 31 ZIP codes with an average Home Safety Score of C (69/100).
12 of 31 ZIP codes have recorded EPA violations. 8 health-based violations have been documented.
← Back to California water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.