CONGRESSIONAL DISTRICT CA

California — 28th District

119th Congress · 72 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-03-22

Data: EPA SDWIS / Census 119th Congress Last verified: 2026-03-22

B
District Grade
75
Avg Safety Score
72
ZIP Codes
398
Total Violations
8
Health Violations
44
Water Systems
San Marino
Best ZIP: 91118 (89/100)
Pearblossom
Lowest ZIP: 93553 (53/100)

Top Contaminants

Consumer Confidence Report Rule (344) Total Coliform (26) Stage 2 DBP Rule (16) Stage 1 DBP Rule (6) Lead (3)

ZIP Codes in This District

72 ZIP codes tracked in California's 28th District. Showing top 50 by safety score.

# ZIP Code City Safety Score Grade Violations
1 91118 San Marino 89 A 0
2 91108 San Marino 88 A 0
3 91012 La Canada Flintridge 83 B 0
4 91031 South Pasadena 83 B 0
5 91224 La Crescenta 83 B 0
6 91711 Claremont 83 B 0
7 91801 Alhambra 83 B 0
8 91802 Alhambra 83 B 0
9 91803 Alhambra 83 B 0
10 91804 Alhambra 83 B 0
11 91841 Alhambra 83 B 0
12 91896 Alhambra 83 B 0
13 91899 Alhambra 83 B 0
14 91737 Rancho Cucamonga 82 B 3
15 91739 Rancho Cucamonga 82 B 3
16 91770 Rosemead 81 B 2
17 91771 Rosemead 81 B 2
18 91772 Rosemead 81 B 2
19 91741 Glendora 80 B 3
20 91007 Arcadia 79 B 2 (1 health)
21 91755 Monterey Park 79 B 2 (1 health)
22 91756 Monterey Park 79 B 2 (1 health)
23 91030 South Pasadena 78 B 0
24 91066 Arcadia 78 B 2 (1 health)
25 91077 Arcadia 78 B 2 (1 health)
26 91214 La Crescenta 78 B 0
27 91784 Upland 78 B 0
28 93563 Valyermo 78 B 2 (1 health)
29 91701 Rancho Cucamonga 77 B 3
30 91101 Pasadena 76 B 14
31 91102 Pasadena 76 B 14
32 91104 Pasadena 76 B 14
33 91106 Pasadena 76 B 14
34 91109 Pasadena 76 B 14
35 91110 Pasadena 76 B 14
36 91114 Pasadena 76 B 14
37 91115 Pasadena 76 B 14
38 91116 Pasadena 76 B 14
39 91117 Pasadena 76 B 14
40 91121 Pasadena 76 B 14
41 91123 Pasadena 76 B 14
42 91124 Pasadena 76 B 14
43 91125 Pasadena 76 B 14
44 91126 Pasadena 76 B 14
45 91129 Pasadena 76 B 14
46 91182 Pasadena 76 B 14
47 91184 Pasadena 76 B 14
48 91185 Pasadena 76 B 14
49 91188 Pasadena 76 B 14
50 91189 Pasadena 76 B 14

Overview

California's 28th District serving an estimated 10,286,190 residents encompasses 72 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (75/100).

398 EPA violations have been recorded across this district's water systems. 8 are health-based violations. About 57% of tracked ZIP codes have at least one violation.

Top Contaminants

The most frequently cited water quality issues in this district:

  • Consumer Confidence Report Rule — 344 violations
  • Total Coliform — 26 violations
  • Stage 2 DBP Rule — 16 violations
  • Stage 1 DBP Rule — 6 violations
  • Lead — 3 violations

Housing Context

Homes in this district were built on average around 1957 (~69 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 28th District.

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