Washington — 1st District
119th Congress · 32 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
32 ZIP codes tracked in Washington's 1st District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 98293 | Startup | 95 | A | 0 |
| 2 | 98270 | Marysville | 92 | A | 6 |
| 3 | 98020 | Edmonds | 90 | A | 1 |
| 4 | 98026 | Edmonds | 90 | A | 1 |
| 5 | 98077 | Woodinville | 89 | A | 6 |
| 6 | 98271 | Marysville | 87 | A | 6 |
| 7 | 98043 | Mountlake Terrace | 85 | A | 2 |
| 8 | 98241 | Darrington | 85 | A | 8 |
| 9 | 98072 | Woodinville | 84 | B | 6 |
| 10 | 98258 | Lake Stevens | 84 | B | 13 |
| 11 | 98252 | Granite Falls | 83 | B | 1 |
| 12 | 98207 | Everett | 82 | B | 19 |
| 13 | 98213 | Everett | 82 | B | 19 |
| 14 | 98256 | Index | 82 | B | 4 |
| 15 | 98203 | Everett | 81 | B | 19 |
| 16 | 98204 | Everett | 81 | B | 19 |
| 17 | 98205 | Everett | 81 | B | 19 |
| 18 | 98206 | Everett | 81 | B | 19 |
| 19 | 98291 | Snohomish | 81 | B | 17 |
| 20 | 98294 | Sultan | 80 | B | 1 |
| 21 | 98223 | Arlington | 78 | B | 1 |
| 22 | 98046 | Lynnwood | 76 | B | 6 |
| 23 | 98201 | Everett | 76 | B | 19 |
| 24 | 98208 | Everett | 76 | B | 19 |
| 25 | 98037 | Lynnwood | 75 | B | 6 |
| 26 | 98087 | Lynnwood | 75 | B | 6 |
| 27 | 98296 | Snohomish | 71 | B | 17 |
| 28 | 98036 | Lynnwood | 70 | B | 6 |
| 29 | 98272 | Monroe | 69 | C | 8 |
| 30 | 98259 | North Lakewood | 66 | C | 0 |
| 31 | 98290 | Snohomish | 66 | C | 17 |
| 32 | 98251 | Gold Bar | 60 | C | 0 |
Overview
Washington's 1st District serving an estimated 4,039,724 residents encompasses 32 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (80/100).
291 EPA violations have been recorded across this district's water systems. None are health-based. About 91% 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 — 129 violations
- Haloacetic Acids (HAA5) — 62 violations
- Total Trihalomethanes (TTHM) — 60 violations
- Consumer Confidence Report Rule — 17 violations
- Lead — 14 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 32 ZIP codes in Washington's 1st District.