Texas — 20th District
119th Congress · 18 ZIP codes · Avg score 87/100 · Grade A · Updated 2026-03-22
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-03-22
Top Contaminants
ZIP Codes in This District
18 ZIP codes tracked in Texas's 20th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 78224 | San Antonio | 92 | A | 4 (2 health) |
| 2 | 78225 | San Antonio | 92 | A | 4 (2 health) |
| 3 | 78226 | San Antonio | 92 | A | 4 (2 health) |
| 4 | 78229 | San Antonio | 92 | A | 4 (2 health) |
| 5 | 78251 | San Antonio | 92 | A | 4 (2 health) |
| 6 | 78211 | San Antonio | 87 | A | 4 (2 health) |
| 7 | 78221 | San Antonio | 87 | A | 4 (2 health) |
| 8 | 78237 | San Antonio | 87 | A | 4 (2 health) |
| 9 | 78240 | San Antonio | 87 | A | 4 (2 health) |
| 10 | 78242 | San Antonio | 87 | A | 4 (2 health) |
| 11 | 78245 | San Antonio | 87 | A | 4 (2 health) |
| 12 | 78249 | San Antonio | 87 | A | 4 (2 health) |
| 13 | 78250 | San Antonio | 87 | A | 4 (2 health) |
| 14 | 78253 | San Antonio | 87 | A | 4 (2 health) |
| 15 | 78201 | San Antonio | 82 | B | 4 (2 health) |
| 16 | 78227 | San Antonio | 82 | B | 4 (2 health) |
| 17 | 78228 | San Antonio | 82 | B | 4 (2 health) |
| 18 | 78238 | San Antonio | 82 | B | 4 (2 health) |
Overview
Texas's 20th District serving an estimated 39,104,280 residents encompasses 18 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is A (87/100).
72 EPA violations have been recorded across this district's water systems. 36 are health-based violations. About 100% 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 — 36 violations
- Total Coliform — 36 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.
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 18 ZIP codes in Texas's 20th District.