CONGRESSIONAL DISTRICT CA

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

C
District Grade
64
Avg Safety Score
72
ZIP Codes
362
Total Violations
217
Health Violations
76
Water Systems
Best ZIP: 93412 (83/100)
Lowest ZIP: 93452 (46/100)

Top Contaminants

Barium (100) E. coli (78) Total Trihalomethanes (TTHM) (66) Lead (36) Consumer Confidence Report Rule (26)

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

Updated daily. Data covers 72 ZIP codes in California's 24th District.

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