California — 15th District
119th Congress · 29 ZIP codes · Avg score 72/100 · Grade B · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
29 ZIP codes tracked in California's 15th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 94302 | Palo Alto | 83 | B | 0 |
| 2 | 94304 | Palo Alto | 83 | B | 0 |
| 3 | 94309 | Palo Alto | 83 | B | 0 |
| 4 | 94064 | Redwood City | 82 | B | 1 (1 health) |
| 5 | 94065 | Redwood City | 82 | B | 1 (1 health) |
| 6 | 94002 | Belmont | 78 | B | 0 |
| 7 | 94066 | San Bruno | 78 | B | 0 |
| 8 | 94306 | Palo Alto | 78 | B | 0 |
| 9 | 94061 | Redwood City | 77 | B | 1 (1 health) |
| 10 | 94062 | Redwood City | 77 | B | 1 (1 health) |
| 11 | 94016 | Daly City | 76 | B | 0 |
| 12 | 94017 | Daly City | 76 | B | 0 |
| 13 | 94037 | Montara | 75 | B | 0 |
| 14 | 94014 | Daly City | 73 | B | 0 |
| 15 | 94015 | Daly City | 73 | B | 0 |
| 16 | 94019 | Half Moon Bay | 73 | B | 0 |
| 17 | 94044 | Pacifica | 73 | B | 0 |
| 18 | 94301 | Palo Alto | 73 | B | 0 |
| 19 | 94063 | Redwood City | 72 | B | 1 (1 health) |
| 20 | 94020 | La Honda | 69 | C | 11 (8 health) |
| 21 | 94030 | Millbrae | 69 | C | 2 (1 health) |
| 22 | 94005 | Brisbane | 68 | C | 0 |
| 23 | 94303 | Palo Alto | 68 | C | 0 |
| 24 | 94018 | El Granada | 63 | C | 0 |
| 25 | 94038 | Moss Beach | 63 | C | 0 |
| 26 | 94021 | Loma Mar | 58 | C | 0 |
| 27 | 94060 | Pescadero | 58 | C | 22 (4 health) |
| 28 | 94028 | Portola Valley | 55 | C | 0 |
| 29 | 94070 | San Carlos | 50 | D | 0 |
Overview
California's 15th District serving an estimated 1,595,571 residents encompasses 29 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (72/100).
40 EPA violations have been recorded across this district's water systems. 18 are health-based violations. About 28% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Total Trihalomethanes (TTHM) — 16 violations
- Mercury — 9 violations
- E. coli — 3 violations
- Consumer Confidence Report Rule — 3 violations
- Haloacetic Acids (HAA5) — 3 violations
Housing Context
Homes in this district were built on average around 1966 (~60 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 29 ZIP codes in California's 15th District.