California — 14th District
119th Congress · 21 ZIP codes · Avg score 77/100 · Grade B · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 21 ZIP codes in California's 14th District: the district earns a grade B (77/100). 40 EPA violations on record, 8 health-based.
Top Contaminants
ZIP Codes in This District
21 ZIP codes tracked in California's 14th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 94550 | Livermore | 95 | A | 0 |
| 2 | 94540 | Hayward | 83 | B | 0 |
| 3 | 94542 | Hayward | 83 | B | 0 |
| 4 | 94543 | Hayward | 83 | B | 0 |
| 5 | 94545 | Hayward | 83 | B | 0 |
| 6 | 94551 | Livermore | 83 | B | 0 |
| 7 | 94557 | Hayward | 83 | B | 0 |
| 8 | 94552 | Castro Valley | 79 | B | 2 (1 health) |
| 9 | 94536 | Fremont | 78 | B | 8 (1 health) |
| 10 | 94538 | Fremont | 78 | B | 8 (1 health) |
| 11 | 94541 | Hayward | 78 | B | 0 |
| 12 | 94544 | Hayward | 78 | B | 0 |
| 13 | 94555 | Fremont | 78 | B | 8 (1 health) |
| 14 | 94537 | Fremont | 77 | B | 8 (1 health) |
| 15 | 94546 | Castro Valley | 74 | B | 2 (1 health) |
| 16 | 94566 | Pleasanton | 73 | B | 2 (1 health) |
| 17 | 94580 | San Lorenzo | 73 | B | 0 |
| 18 | 94588 | Pleasanton | 73 | B | 2 (1 health) |
| 19 | 94586 | Sunol | 63 | C | 0 |
| 20 | 94578 | San Leandro | 58 | C | 0 |
| 21 | 94587 | Union City | 55 | C | 0 |
Overview
California's 14th District encompasses 21 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (77/100).
40 EPA violations have been recorded across this district's water systems. 8 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 1 DBP Rule - 24 violations
- Stage 2 DBP Rule - 16 violations
Housing Context
Homes in this district were built on average around 1975 (~51 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 1 ZIP code in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.
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 21 ZIP codes in California's 14th District.