Washington — 10th District
119th Congress · 21 ZIP codes · Avg score 92/100 · Grade A · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
21 ZIP codes tracked in Washington's 10th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 98504 | Olympia | 99 | A | 1 |
| 2 | 98505 | Olympia | 99 | A | 1 |
| 3 | 98508 | Olympia | 99 | A | 1 |
| 4 | 98556 | Littlerock | 99 | A | 1 |
| 5 | 98599 | Olympia | 99 | A | 1 |
| 6 | 98509 | Lacey | 96 | A | 0 |
| 7 | 98506 | Olympia | 95 | A | 1 |
| 8 | 98507 | Olympia | 95 | A | 1 |
| 9 | 98516 | Olympia | 95 | A | 1 |
| 10 | 98503 | Lacey | 93 | A | 0 |
| 11 | 98501 | Olympia | 90 | A | 1 |
| 12 | 98502 | Olympia | 90 | A | 1 |
| 13 | 98512 | Olympia | 90 | A | 1 |
| 14 | 98530 | Bucoda | 89 | A | 2 |
| 15 | 98589 | Tenino | 89 | A | 2 |
| 16 | 98540 | East Olympia | 88 | A | 0 |
| 17 | 98576 | Rainier | 88 | A | 1 |
| 18 | 98513 | Olympia | 85 | A | 1 |
| 19 | 98579 | Rochester | 85 | A | 0 |
| 20 | 98597 | Yelm | 84 | B | 2 |
| 21 | 98511 | Tumwater | 77 | B | 8 (7 health) |
Overview
Washington's 10th District serving an estimated 1,696,177 residents encompasses 21 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is A (92/100).
27 EPA violations have been recorded across this district's water systems. 7 are health-based violations. About 81% 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 — 17 violations
- E. coli — 7 violations
- Haloacetic Acids (HAA5) — 1 violation
- Consumer Confidence Report Rule — 1 violation
- Total Trihalomethanes (TTHM) — 1 violation
Housing Context
Homes in this district were built on average around 1989 (~37 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 21 ZIP codes in Washington's 10th District.