Arizona — 1st District
119th Congress · 37 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 37 ZIP codes in Arizona's 1st District: the district earns a grade C (67/100). 1,900 EPA violations on record, 243 health-based.
Top Contaminants
ZIP Codes in This District
37 ZIP codes tracked in Arizona's 1st District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 85377 | Carefree | 83 | B | 0 |
| 2 | 85252 | Scottsdale | 82 | B | 21 (1 health) |
| 3 | 85256 | Scottsdale | 82 | B | 21 (1 health) |
| 4 | 85259 | Scottsdale | 82 | B | 21 (1 health) |
| 5 | 85261 | Scottsdale | 82 | B | 21 (1 health) |
| 6 | 85262 | Scottsdale | 82 | B | 21 (1 health) |
| 7 | 85267 | Scottsdale | 82 | B | 21 (1 health) |
| 8 | 85271 | Scottsdale | 82 | B | 21 (1 health) |
| 9 | 85263 | Rio Verde | 80 | B | 3 |
| 10 | 85250 | Scottsdale | 77 | B | 21 (1 health) |
| 11 | 85254 | Scottsdale | 77 | B | 21 (1 health) |
| 12 | 85257 | Scottsdale | 77 | B | 21 (1 health) |
| 13 | 85258 | Scottsdale | 77 | B | 21 (1 health) |
| 14 | 85260 | Scottsdale | 77 | B | 21 (1 health) |
| 15 | 85266 | Scottsdale | 77 | B | 21 (1 health) |
| 16 | 85211 | Mesa | 72 | B | 7 |
| 17 | 85251 | Scottsdale | 72 | B | 21 (1 health) |
| 18 | 85255 | Scottsdale | 72 | B | 21 (1 health) |
| 19 | 85327 | Cave Creek | 69 | C | 22 |
| 20 | 85253 | Paradise Valley | 68 | C | 5 |
| 21 | 85268 | Fountain Hills | 67 | C | 7 |
| 22 | 85269 | Fountain Hills | 65 | C | 7 |
| 23 | 85331 | Cave Creek | 59 | C | 22 |
| 24 | 85027 | Phoenix | 58 | C | 126 (19 health) |
| 25 | 85028 | Phoenix | 58 | C | 126 (19 health) |
| 26 | 85050 | Phoenix | 58 | C | 126 (19 health) |
| 27 | 85054 | Phoenix | 58 | C | 126 (19 health) |
| 28 | 85022 | Phoenix | 53 | D | 126 (19 health) |
| 29 | 85032 | Phoenix | 53 | D | 126 (19 health) |
| 30 | 85190 | Tortilla Flat | 53 | D | 0 |
| 31 | 85264 | Fort Mcdowell | 53 | D | 0 |
| 32 | 85024 | Phoenix | 50 | D | 126 (19 health) |
| 33 | 85008 | Phoenix | 48 | D | 126 (19 health) |
| 34 | 85016 | Phoenix | 48 | D | 126 (19 health) |
| 35 | 85018 | Phoenix | 48 | D | 126 (19 health) |
| 36 | 85020 | Phoenix | 48 | D | 126 (19 health) |
| 37 | 85021 | Phoenix | 48 | D | 126 (19 health) |
Overview
Arizona's 1st District encompasses 37 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (67/100).
1900 EPA violations have been recorded across this district's water systems. 243 are health-based violations. About 92% 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 - 558 violations
- Stage 2 DBP Rule - 204 violations
- Revised Total Coliform Rule - 188 violations
- Chlorite - 162 violations
- E. coli - 121 violations
Housing Context
Homes in this district were built on average around 1985 (~41 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 37 ZIP codes in Arizona's 1st District.