California — 3rd District
119th Congress · 107 ZIP codes · Avg score 68/100 · Grade C · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in California's 3rd District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 95604 | Auburn | 83 | B | 0 |
| 2 | 95692 | Wheatland | 83 | B | 0 |
| 3 | 95715 | Emigrant Gap | 83 | B | 0 |
| 4 | 95722 | Meadow Vista | 83 | B | 0 |
| 5 | 95763 | Folsom | 83 | B | 1 |
| 6 | 95910 | Alleghany | 83 | B | 0 |
| 7 | 95919 | Brownsville | 83 | B | 0 |
| 8 | 95949 | Grass Valley | 83 | B | 1 |
| 9 | 96125 | Sierra City | 83 | B | 1 |
| 10 | 96126 | Sierraville | 83 | B | 0 |
| 11 | 96146 | Olympic Valley | 83 | B | 0 |
| 12 | 96148 | Tahoe Vista | 83 | B | 0 |
| 13 | 96160 | Truckee | 83 | B | 0 |
| 14 | 96162 | Truckee | 83 | B | 0 |
| 15 | 95646 | Kirkwood | 82 | B | 2 |
| 16 | 95703 | Applegate | 82 | B | 3 (1 health) |
| 17 | 95713 | Colfax | 82 | B | 2 |
| 18 | 96111 | Floriston | 82 | B | 2 |
| 19 | 96020 | Chester | 81 | B | 2 (2 health) |
| 20 | 95959 | Nevada City | 80 | B | 3 (3 health) |
| 21 | 93517 | Bridgeport | 79 | B | 28 (1 health) |
| 22 | 95946 | Penn Valley | 79 | B | 4 (1 health) |
| 23 | 95986 | Washington | 79 | B | 2 (1 health) |
| 24 | 96106 | Clio | 79 | B | 3 (1 health) |
| 25 | 96140 | Carnelian Bay | 79 | B | 4 (1 health) |
| 26 | 96145 | Tahoe City | 79 | B | 2 (1 health) |
| 27 | 95602 | Auburn | 78 | B | 0 |
| 28 | 95603 | Auburn | 78 | B | 0 |
| 29 | 95630 | Folsom | 78 | B | 1 |
| 30 | 95667 | Placerville | 78 | B | 0 |
| 31 | 95747 | Roseville | 78 | B | 1 |
| 32 | 95945 | Grass Valley | 78 | B | 1 |
| 33 | 95953 | Live Oak | 78 | B | 0 |
| 34 | 95962 | Oregon House | 78 | B | 2 (1 health) |
| 35 | 96161 | Truckee | 78 | B | 0 |
| 36 | 95634 | Georgetown | 77 | B | 12 |
| 37 | 95936 | Downieville | 77 | B | 5 (3 health) |
| 38 | 95728 | Soda Springs | 76 | B | 2 (2 health) |
| 39 | 95922 | Camptonville | 76 | B | 8 |
| 40 | 95971 | Quincy | 76 | B | 1 |
| 41 | 95984 | Twain | 75 | B | 4 (2 health) |
| 42 | 95684 | Somerset | 74 | B | 0 |
| 43 | 95947 | Greenville | 74 | B | 2 (1 health) |
| 44 | 95678 | Roseville | 73 | B | 1 |
| 45 | 95724 | Norden | 72 | B | 0 |
| 46 | 96124 | Calpine | 72 | B | 0 |
| 47 | 93541 | Lee Vining | 71 | B | 0 |
| 48 | 95903 | Beale Afb | 71 | B | 3 |
| 49 | 95650 | Loomis | 70 | B | 0 |
| 50 | 96118 | Loyalton | 70 | B | 1 |
Overview
California's 3rd District serving an estimated 3,450,024 residents encompasses 107 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (68/100).
513 EPA violations have been recorded across this district's water systems. 65 are health-based violations. About 43% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Stage 1 DBP Rule — 45 violations
- Stage 2 DBP Rule — 44 violations
- Consumer Confidence Report Rule — 29 violations
- Fecal Coliform — 27 violations
- Haloacetic Acids (HAA5) — 16 violations
Housing Context
Homes in this district were built on average around 1976 (~50 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.
Lead Alert: 2 ZIP codes in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.
Data Sources
- Water quality violations: EPA Safe Drinking Water Information System (SDWIS)
- Congressional district boundaries: U.S. Census Bureau, 119th Congress
- Housing age: U.S. Census Bureau American Community Survey
Updated daily. Data covers 107 ZIP codes in California's 3rd District.