Washington — 1st District
119th Congress · 31 ZIP codes · Avg score 83/100 · Grade B · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 31 ZIP codes in Washington's 1st District: the district earns a grade B (83/100). 90 EPA violations on record, 0 health-based.
Top Contaminants
ZIP Codes in This District
31 ZIP codes tracked in Washington's 1st District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 98073 | Redmond | 97 | A | 2 |
| 2 | 98083 | Kirkland | 94 | A | 2 |
| 3 | 98270 | Marysville | 94 | A | 3 |
| 4 | 98291 | Snohomish | 92 | A | 4 |
| 5 | 98033 | Kirkland | 89 | A | 2 |
| 6 | 98034 | Kirkland | 89 | A | 2 |
| 7 | 98072 | Woodinville | 89 | A | 3 |
| 8 | 98009 | Bellevue | 88 | A | 0 |
| 9 | 98015 | Bellevue | 88 | A | 0 |
| 10 | 98052 | Redmond | 88 | A | 2 |
| 11 | 98205 | Everett | 87 | A | 8 |
| 12 | 98041 | Bothell | 85 | A | 4 |
| 13 | 98043 | Mountlake Terrace | 85 | A | 2 |
| 14 | 98011 | Bothell | 84 | B | 4 |
| 15 | 98012 | Bothell | 84 | B | 4 |
| 16 | 98021 | Bothell | 84 | B | 4 |
| 17 | 98258 | Lake Stevens | 84 | B | 13 |
| 18 | 98004 | Bellevue | 82 | B | 0 |
| 19 | 98007 | Bellevue | 82 | B | 0 |
| 20 | 98008 | Bellevue | 82 | B | 0 |
| 21 | 98028 | Kenmore | 82 | B | 0 |
| 22 | 98208 | Everett | 82 | B | 8 |
| 23 | 98296 | Snohomish | 82 | B | 4 |
| 24 | 98087 | Lynnwood | 81 | B | 3 |
| 25 | 98223 | Arlington | 78 | B | 1 |
| 26 | 98290 | Snohomish | 77 | B | 4 |
| 27 | 98036 | Lynnwood | 76 | B | 3 |
| 28 | 98039 | Medina | 73 | B | 0 |
| 29 | 98272 | Monroe | 69 | C | 8 |
| 30 | 98082 | Mill Creek | 66 | C | 0 |
| 31 | 98259 | North Lakewood | 66 | C | 0 |
Overview
Washington's 1st District encompasses 31 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (83/100).
90 EPA violations have been recorded across this district's water systems. None are health-based. About 71% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Surface Water Treatment Rule - 35 violations
- Total Trihalomethanes (TTHM) - 17 violations
- Haloacetic Acids (HAA5) - 17 violations
- Consumer Confidence Report Rule - 13 violations
- Lead - 5 violations
Housing Context
Homes in this district were built on average around 1987 (~39 years old). Most homes were built after lead pipe regulations were tightened.
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 31 ZIP codes in Washington's 1st District.