California — 1st District
119th Congress · 147 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 147 ZIP codes in California's 1st District: the district earns a grade B (80/100). 198 EPA violations on record, 91 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in California's 1st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 95939 | Elk Creek | 99 | A | 0 |
| 2 | 96014 | Callahan | 99 | A | 0 |
| 3 | 96015 | Canby | 99 | A | 0 |
| 4 | 96016 | Cassel | 99 | A | 0 |
| 5 | 96049 | Redding | 99 | A | 1 |
| 6 | 96079 | Shasta Lake | 99 | A | 0 |
| 7 | 96089 | Shasta Lake | 99 | A | 0 |
| 8 | 96099 | Redding | 99 | A | 1 |
| 9 | 96104 | Cedarville | 99 | A | 0 |
| 10 | 96113 | Herlong | 99 | A | 0 |
| 11 | 96127 | Susanville | 99 | A | 0 |
| 12 | 95930 | Clipper Mills | 98 | A | 2 |
| 13 | 96009 | Bieber | 97 | A | 0 |
| 14 | 95913 | Artois | 95 | A | 0 |
| 15 | 95970 | Princeton | 95 | A | 0 |
| 16 | 95982 | Sutter | 95 | A | 0 |
| 17 | 96027 | Etna | 95 | A | 0 |
| 18 | 96087 | Shasta | 95 | A | 0 |
| 19 | 96092 | Vina | 95 | A | 0 |
| 20 | 96023 | Dorris | 94 | A | 3 (1 health) |
| 21 | 96063 | Mineral | 94 | A | 2 (1 health) |
| 22 | 96064 | Montague | 94 | A | 2 (1 health) |
| 23 | 96067 | Mount Shasta | 94 | A | 2 (1 health) |
| 24 | 96071 | Old Station | 94 | A | 2 (1 health) |
| 25 | 96075 | Paynes Creek | 94 | A | 3 (1 health) |
| 26 | 96076 | Platina | 94 | A | 3 (1 health) |
| 27 | 96088 | Shingletown | 94 | A | 3 (1 health) |
| 28 | 95992 | Yuba City | 93 | A | 1 |
| 29 | 96013 | Burney | 93 | A | 1 |
| 30 | 96022 | Cottonwood | 91 | A | 3 (1 health) |
| 31 | 96051 | Lakehead | 91 | A | 2 (1 health) |
| 32 | 96097 | Yreka | 91 | A | 2 (1 health) |
| 33 | 95912 | Arbuckle | 90 | A | 4 |
| 34 | 95938 | Durham | 90 | A | 1 |
| 35 | 95951 | Hamilton City | 90 | A | 0 |
| 36 | 95953 | Live Oak | 90 | A | 0 |
| 37 | 96001 | Redding | 90 | A | 1 |
| 38 | 96003 | Redding | 90 | A | 1 |
| 39 | 96019 | Shasta Lake | 90 | A | 0 |
| 40 | 96032 | Fort Jones | 90 | A | 1 |
| 41 | 96130 | Susanville | 90 | A | 0 |
| 42 | 95920 | Butte City | 89 | A | 1 |
| 43 | 96035 | Gerber | 89 | A | 4 (2 health) |
| 44 | 96039 | Happy Camp | 89 | A | 2 (1 health) |
| 45 | 96101 | Alturas | 89 | A | 4 (2 health) |
| 46 | 96134 | Tulelake | 89 | A | 7 (2 health) |
| 47 | 95955 | Maxwell | 88 | A | 1 |
| 48 | 95963 | Orland | 88 | A | 1 |
| 49 | 95967 | Paradise | 88 | A | 0 |
| 50 | 95993 | Yuba City | 88 | A | 1 |
Overview
California's 1st District encompasses 147 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (80/100).
198 EPA violations have been recorded across this district's water systems. 91 are health-based violations. About 40% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Stage 2 DBP Rule - 86 violations
- Consumer Confidence Report Rule - 30 violations
- Stage 1 DBP Rule - 21 violations
- Total Trihalomethanes (TTHM) - 18 violations
- Barium - 16 violations
Housing Context
Homes in this district were built on average around 1973 (~53 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 1 ZIP code 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 147 ZIP codes in California's 1st District.