California — 24th District
119th Congress · 72 ZIP codes · Avg score 64/100 · Grade C · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
72 ZIP codes tracked in California's 24th District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 93412 | Los Osos | 83 | B | 0 |
| 2 | 93403 | San Luis Obispo | 81 | B | 4 (2 health) |
| 3 | 93406 | San Luis Obispo | 81 | B | 4 (2 health) |
| 4 | 93407 | San Luis Obispo | 81 | B | 4 (2 health) |
| 5 | 93408 | San Luis Obispo | 81 | B | 4 (2 health) |
| 6 | 93409 | San Luis Obispo | 81 | B | 4 (2 health) |
| 7 | 93410 | San Luis Obispo | 81 | B | 4 (2 health) |
| 8 | 93465 | Templeton | 81 | B | 0 |
| 9 | 93423 | Atascadero | 80 | B | 6 |
| 10 | 93402 | Los Osos | 78 | B | 0 |
| 11 | 93430 | Cayucos | 78 | B | 0 |
| 12 | 93444 | Nipomo | 78 | B | 0 |
| 13 | 93424 | Avila Beach | 77 | B | 3 (3 health) |
| 14 | 93422 | Atascadero | 75 | B | 6 |
| 15 | 93421 | Arroyo Grande | 73 | B | 3 |
| 16 | 93451 | San Miguel | 72 | B | 0 |
| 17 | 93475 | Oceano | 72 | B | 1 |
| 18 | 93401 | San Luis Obispo | 71 | B | 4 (2 health) |
| 19 | 93405 | San Luis Obispo | 71 | B | 4 (2 health) |
| 20 | 93014 | Carpinteria | 70 | B | 0 |
| 21 | 93420 | Arroyo Grande | 70 | B | 3 |
| 22 | 93436 | Lompoc | 70 | B | 0 |
| 23 | 93440 | Los Alamos | 70 | B | 0 |
| 24 | 93445 | Oceano | 70 | B | 1 |
| 25 | 93254 | New Cuyama | 68 | C | 5 |
| 26 | 93116 | Goleta | 66 | C | 0 |
| 27 | 93118 | Goleta | 66 | C | 0 |
| 28 | 93199 | Goleta | 66 | C | 0 |
| 29 | 93428 | Cambria | 66 | C | 4 (4 health) |
| 30 | 93437 | Lompoc | 66 | C | 0 |
| 31 | 93438 | Lompoc | 66 | C | 0 |
| 32 | 93455 | Santa Maria | 66 | C | 5 |
| 33 | 93458 | Santa Maria | 66 | C | 5 |
| 34 | 93441 | Los Olivos | 65 | C | 0 |
| 35 | 93460 | Santa Ynez | 65 | C | 0 |
| 36 | 93102 | Santa Barbara | 64 | C | 3 |
| 37 | 93111 | Santa Barbara | 64 | C | 3 |
| 38 | 93434 | Guadalupe | 62 | C | 0 |
| 39 | 93456 | Santa Maria | 62 | C | 5 |
| 40 | 93457 | Santa Maria | 62 | C | 5 |
| 41 | 93454 | Santa Maria | 61 | C | 5 |
| 42 | 93013 | Carpinteria | 60 | C | 0 |
| 43 | 93106 | Santa Barbara | 60 | C | 3 |
| 44 | 93107 | Santa Barbara | 60 | C | 3 |
| 45 | 93117 | Goleta | 60 | C | 0 |
| 46 | 93120 | Santa Barbara | 60 | C | 3 |
| 47 | 93121 | Santa Barbara | 60 | C | 3 |
| 48 | 93130 | Santa Barbara | 60 | C | 3 |
| 49 | 93140 | Santa Barbara | 60 | C | 3 |
| 50 | 93150 | Santa Barbara | 60 | C | 3 |
Overview
California's 24th District serving an estimated 4,184,941 residents encompasses 72 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (64/100).
362 EPA violations have been recorded across this district's water systems. 217 are health-based violations. About 67% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Barium — 100 violations
- E. coli — 78 violations
- Total Trihalomethanes (TTHM) — 66 violations
- Lead — 36 violations
- Consumer Confidence Report Rule — 26 violations
Housing Context
Homes in this district were built on average around 1977 (~49 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.
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 72 ZIP codes in California's 24th District.