California — 51st District
119th Congress · 179 ZIP codes · Avg score 65/100 · Grade C · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in California's 51st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 91909 | Chula Vista | 99 | A | 0 |
| 2 | 91912 | Chula Vista | 99 | A | 0 |
| 3 | 91913 | Chula Vista | 99 | A | 0 |
| 4 | 91914 | Chula Vista | 99 | A | 0 |
| 5 | 91921 | Chula Vista | 99 | A | 0 |
| 6 | 91943 | La Mesa | 99 | A | 0 |
| 7 | 91944 | La Mesa | 99 | A | 0 |
| 8 | 92013 | Carlsbad | 99 | A | 0 |
| 9 | 92018 | Carlsbad | 99 | A | 0 |
| 10 | 92074 | Poway | 99 | A | 0 |
| 11 | 92085 | Vista | 99 | A | 0 |
| 12 | 91979 | Spring Valley | 97 | A | 1 |
| 13 | 92023 | Encinitas | 97 | A | 4 |
| 14 | 92055 | Camp Pendleton | 97 | A | 5 |
| 15 | 91911 | Chula Vista | 95 | A | 0 |
| 16 | 91915 | Chula Vista | 95 | A | 0 |
| 17 | 92010 | Carlsbad | 95 | A | 0 |
| 18 | 92011 | Carlsbad | 95 | A | 0 |
| 19 | 92081 | Vista | 95 | A | 0 |
| 20 | 92088 | Fallbrook | 95 | A | 0 |
| 21 | 92091 | Rancho Santa Fe | 95 | A | 0 |
| 22 | 91933 | Imperial Beach | 93 | A | 2 (2 health) |
| 23 | 91976 | Spring Valley | 93 | A | 1 |
| 24 | 91978 | Spring Valley | 93 | A | 1 |
| 25 | 91910 | Chula Vista | 90 | A | 0 |
| 26 | 91941 | La Mesa | 90 | A | 0 |
| 27 | 91942 | La Mesa | 90 | A | 0 |
| 28 | 92008 | Carlsbad | 90 | A | 0 |
| 29 | 92009 | Carlsbad | 90 | A | 0 |
| 30 | 92028 | Fallbrook | 90 | A | 0 |
| 31 | 92067 | Rancho Santa Fe | 90 | A | 0 |
| 32 | 92083 | Vista | 90 | A | 0 |
| 33 | 92084 | Vista | 90 | A | 0 |
| 34 | 91906 | Campo | 89 | A | 5 (1 health) |
| 35 | 91932 | Imperial Beach | 88 | A | 2 (2 health) |
| 36 | 92024 | Encinitas | 88 | A | 4 |
| 37 | 92049 | Oceanside | 88 | A | 0 |
| 38 | 92051 | Oceanside | 88 | A | 0 |
| 39 | 92052 | Oceanside | 88 | A | 0 |
| 40 | 92070 | Santa Ysabel | 87 | A | 10 (1 health) |
| 41 | 92064 | Poway | 85 | A | 0 |
| 42 | 92061 | Pauma Valley | 84 | B | 5 |
| 43 | 91977 | Spring Valley | 83 | B | 1 |
| 44 | 92056 | Oceanside | 82 | B | 0 |
| 45 | 92057 | Oceanside | 82 | B | 0 |
| 46 | 92058 | Oceanside | 82 | B | 0 |
| 47 | 92040 | Lakeside | 81 | B | 6 |
| 48 | 92014 | Del Mar | 80 | B | 4 |
| 49 | 92060 | Palomar Mountain | 80 | B | 6 |
| 50 | 92054 | Oceanside | 77 | B | 0 |
Overview
California's 51st District serving an estimated 138,056,483 residents encompasses 179 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (65/100).
2875 EPA violations have been recorded across this district's water systems. 1264 are health-based violations. About 64% 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 — 1786 violations
- Total Coliform — 326 violations
- Stage 1 DBP Rule — 194 violations
- Stage 2 DBP Rule — 173 violations
- Nickel — 96 violations
Housing Context
Homes in this district were built on average around 1980 (~46 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.
Lead Alert: 3 ZIP codes 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 179 ZIP codes in California's 51st District.