California — 51st District
119th Congress · 30 ZIP codes · Avg score 71/100 · Grade B · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 30 ZIP codes in California's 51st District: the district earns a grade B (71/100). 225 EPA violations on record, 68 health-based.
Top Contaminants
ZIP Codes in This District
30 ZIP codes tracked in California's 51st District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 91943 | La Mesa | 99 | A | 0 |
| 2 | 91944 | La Mesa | 99 | A | 0 |
| 3 | 91979 | Spring Valley | 97 | A | 1 |
| 4 | 91976 | Spring Valley | 93 | A | 1 |
| 5 | 91978 | Spring Valley | 93 | A | 1 |
| 6 | 91941 | La Mesa | 90 | A | 0 |
| 7 | 91942 | La Mesa | 90 | A | 0 |
| 8 | 91977 | Spring Valley | 83 | B | 1 |
| 9 | 91945 | Lemon Grove | 73 | B | 0 |
| 10 | 91946 | Lemon Grove | 73 | B | 0 |
| 11 | 92022 | El Cajon | 66 | C | 0 |
| 12 | 92020 | El Cajon | 65 | C | 0 |
| 13 | 92021 | El Cajon | 65 | C | 0 |
| 14 | 92111 | San Diego | 65 | C | 13 (4 health) |
| 15 | 92119 | San Diego | 65 | C | 13 (4 health) |
| 16 | 92123 | San Diego | 65 | C | 13 (4 health) |
| 17 | 92124 | San Diego | 65 | C | 13 (4 health) |
| 18 | 92126 | San Diego | 65 | C | 13 (4 health) |
| 19 | 92131 | San Diego | 65 | C | 13 (4 health) |
| 20 | 92110 | San Diego | 60 | C | 13 (4 health) |
| 21 | 92115 | San Diego | 60 | C | 13 (4 health) |
| 22 | 92116 | San Diego | 60 | C | 13 (4 health) |
| 23 | 92117 | San Diego | 60 | C | 13 (4 health) |
| 24 | 92137 | San Diego | 60 | C | 13 (4 health) |
| 25 | 92145 | San Diego | 60 | C | 13 (4 health) |
| 26 | 92182 | San Diego | 60 | C | 13 (4 health) |
| 27 | 92194 | San Diego | 60 | C | 13 (4 health) |
| 28 | 92108 | San Diego | 55 | C | 13 (4 health) |
| 29 | 92120 | San Diego | 55 | C | 13 (4 health) |
| 30 | 92121 | San Diego | 55 | C | 13 (4 health) |
Overview
California's 51st District encompasses 30 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (71/100).
225 EPA violations have been recorded across this district's water systems. 68 are health-based violations. About 70% 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 - 136 violations
- Total Coliform - 34 violations
- Stage 2 DBP Rule - 34 violations
- Stage 1 DBP Rule - 21 violations
Housing Context
Homes in this district were built on average around 1976 (~50 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 30 ZIP codes in California's 51st District.