California — 26th District
119th Congress · 22 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
22 ZIP codes tracked in California's 26th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 93021 | Moorpark | 70 | B | 0 |
| 2 | 91358 | Thousand Oaks | 66 | C | 0 |
| 3 | 91363 | Thousand Oaks | 66 | C | 0 |
| 4 | 93020 | Moorpark | 66 | C | 0 |
| 5 | 93031 | Oxnard | 66 | C | 3 (1 health) |
| 6 | 93033 | Oxnard | 66 | C | 3 (1 health) |
| 7 | 93061 | Santa Paula | 66 | C | 0 |
| 8 | 91360 | Thousand Oaks | 65 | C | 0 |
| 9 | 91362 | Thousand Oaks | 65 | C | 0 |
| 10 | 93030 | Oxnard | 61 | C | 3 (1 health) |
| 11 | 93032 | Oxnard | 61 | C | 3 (1 health) |
| 12 | 93034 | Oxnard | 61 | C | 3 (1 health) |
| 13 | 93036 | Oxnard | 61 | C | 3 (1 health) |
| 14 | 93060 | Santa Paula | 60 | C | 0 |
| 15 | 93041 | Port Hueneme | 59 | C | 4 |
| 16 | 93035 | Oxnard | 56 | C | 3 (1 health) |
| 17 | 93044 | Port Hueneme | 52 | D | 4 |
| 18 | 91320 | Newbury Park | 45 | D | 0 |
| 19 | 91377 | Oak Park | 45 | D | 0 |
| 20 | 91319 | Newbury Park | 40 | D | 0 |
| 21 | 93042 | Point Mugu Nawc | 40 | D | 0 |
| 22 | 93043 | Port Hueneme Cbc Base | 40 | D | 0 |
Overview
California's 26th District serving an estimated 2,271,888 residents encompasses 22 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (58/100).
29 EPA violations have been recorded across this district's water systems. 7 are health-based violations. About 41% 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 — 14 violations
- Consumer Confidence Report Rule — 8 violations
- Surface Water Treatment Rule — 7 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.
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 22 ZIP codes in California's 26th District.