CONGRESSIONAL DISTRICT CA

California — 1st District

119th Congress · 127 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-03

Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03

B
District Grade
81
Avg Safety Score
127
ZIP Codes
255
Total Violations
134
Health Violations
125
Water Systems
Elk Creek
Best ZIP: 95939 (99/100)
Willows
Lowest ZIP: 95988 (60/100)

Top Contaminants

Stage 2 DBP Rule (78) Consumer Confidence Report Rule (44) E. coli (42) Barium (41) Stage 1 DBP Rule (27)

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 92673 San Clemente 95 A 0
13 92674 San Clemente 95 A 0
14 95658 Newcastle 95 A 0
15 95913 Artois 95 A 0
16 95970 Princeton 95 A 0
17 95982 Sutter 95 A 0
18 96027 Etna 95 A 0
19 96087 Shasta 95 A 0
20 96092 Vina 95 A 0
21 96137 Westwood 95 A 0
22 96023 Dorris 94 A 3 (1 health)
23 96063 Mineral 94 A 2 (1 health)
24 96064 Montague 94 A 2 (1 health)
25 96067 Mount Shasta 94 A 2 (1 health)
26 96071 Old Station 94 A 2 (1 health)
27 96075 Paynes Creek 94 A 5 (1 health)
28 96076 Platina 94 A 3 (1 health)
29 96088 Shingletown 94 A 4 (1 health)
30 95992 Yuba City 93 A 1
31 96013 Burney 93 A 1
32 92321 Cedar Glen 91 A 12 (1 health)
33 96022 Cottonwood 91 A 4 (1 health)
34 96051 Lakehead 91 A 2 (1 health)
35 96097 Yreka 91 A 2 (1 health)
36 95912 Arbuckle 90 A 4
37 95951 Hamilton City 90 A 0
38 96001 Redding 90 A 1
39 96003 Redding 90 A 1
40 96019 Shasta Lake 90 A 0
41 96038 Grenada 90 A 1
42 96130 Susanville 90 A 0
43 95920 Butte City 89 A 1
44 96032 Fort Jones 89 A 2
45 96035 Gerber 89 A 4 (2 health)
46 96039 Happy Camp 89 A 2 (1 health)
47 96044 Hornbrook 89 A 3 (2 health)
48 96101 Alturas 89 A 4 (2 health)
49 96134 Tulelake 89 A 9 (2 health)
50 95955 Maxwell 88 A 1

Overview

California's 1st District serving an estimated 1,607,664 residents encompasses 127 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (81/100).

255 EPA violations have been recorded across this district's water systems. 134 are health-based violations. About 38% 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 — 78 violations
  • Consumer Confidence Report Rule — 44 violations
  • E. coli — 42 violations
  • Barium — 41 violations
  • Stage 1 DBP Rule — 27 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.

Data Sources

Updated daily. Data covers 127 ZIP codes in California's 1st District.

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