California — 38th District
119th Congress · 34 ZIP codes · Avg score 77/100 · Grade B · Updated 2026-03-22
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-03-22
Top Contaminants
ZIP Codes in This District
34 ZIP codes tracked in California's 38th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 90632 | La Habra | 88 | A | 0 |
| 2 | 90633 | La Habra | 88 | A | 0 |
| 3 | 90601 | Whittier | 83 | B | 0 |
| 4 | 90602 | Whittier | 83 | B | 0 |
| 5 | 90603 | Whittier | 83 | B | 0 |
| 6 | 90604 | Whittier | 83 | B | 0 |
| 7 | 90605 | Whittier | 83 | B | 0 |
| 8 | 90606 | Whittier | 83 | B | 0 |
| 9 | 90607 | Whittier | 83 | B | 0 |
| 10 | 90608 | Whittier | 83 | B | 0 |
| 11 | 90609 | Whittier | 83 | B | 0 |
| 12 | 90610 | Whittier | 83 | B | 0 |
| 13 | 90612 | Whittier | 83 | B | 0 |
| 14 | 91788 | Walnut | 83 | B | 0 |
| 15 | 91789 | Walnut | 83 | B | 0 |
| 16 | 91795 | Walnut | 83 | B | 0 |
| 17 | 90631 | La Habra | 82 | B | 0 |
| 18 | 90670 | Santa Fe Springs | 82 | B | 0 |
| 19 | 90671 | Santa Fe Springs | 81 | B | 0 |
| 20 | 90661 | Pico Rivera | 79 | B | 5 |
| 21 | 90662 | Pico Rivera | 79 | B | 5 |
| 22 | 90240 | Downey | 78 | B | 1 |
| 23 | 90650 | Norwalk | 75 | B | 0 |
| 24 | 91748 | Rowland Heights | 75 | B | 0 |
| 25 | 90640 | Montebello | 74 | B | 18 |
| 26 | 90660 | Pico Rivera | 74 | B | 5 |
| 27 | 90651 | Norwalk | 72 | B | 0 |
| 28 | 90652 | Norwalk | 72 | B | 0 |
| 29 | 90659 | Norwalk | 72 | B | 0 |
| 30 | 90638 | La Mirada | 63 | C | 0 |
| 31 | 91765 | Diamond Bar | 63 | C | 0 |
| 32 | 91745 | Hacienda Heights | 55 | C | 0 |
| 33 | 90637 | La Mirada | 53 | D | 0 |
| 34 | 90639 | La Mirada | 53 | D | 0 |
Overview
California's 38th District serving an estimated 2,378,489 residents encompasses 34 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (77/100).
34 EPA violations have been recorded across this district's water systems. None are health-based. About 15% 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 — 13 violations
- Haloacetic Acids (HAA5) — 3 violations
- Total Trihalomethanes (TTHM) — 3 violations
- Total Coliform — 3 violations
- Revised Total Coliform Rule — 3 violations
Housing Context
Homes in this district were built on average around 1959 (~67 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 34 ZIP codes in California's 38th District.