Thurston County, Washington
21 ZIP codes · Avg score 89/100 · Grade A · Updated
ZipCheckup grade for Thurston County: A.
No federal data flags a major home-safety concern for this ZIP.
For households in Thurston County, the 21 ZIP codes on record show consistently safe tap water.
How Thurston County Compares
How Thurston County Compares
Thurston County scores 3 points above the Washington state average (86/100) and 16 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Thurston County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 11.2%, diabetes 10.3%)
Estimated additional annual cost per homeowner: $3,998, driven primarily by sea_level
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Thurston County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 9 violations. Past 5 years: 18 total (18 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $3,998
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Thurston County
Remediation costs are relatively manageable for most homeowners in Thurston County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Thurston County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Thurston County
8 community water systems serving Thurston County.
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- A
- A
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- A
Show all 8 water systems
- A
32 total water systems serve Thurston County.
Systems with the most violations in Thurston County
5 water systems with recorded EPA violations.
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- C
- A
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All ZIP Codes in Thurston County
21 ZIP codes tracked in Thurston County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98512 | Olympia | 98 | A | 5 | $439K |
| 2 | 98516 | Olympia | 98 | A | 6 (1 health) | $528K |
| 3 | 98589 | Tenino | 98 | A | 3 | $409K |
| 4 | 98597 | Yelm | 98 | A | 4 | $423K |
| 5 | 98513 | Olympia | 97 | A | 6 | $443K |
| 6 | 98503 | Lacey | 82 | B | 5 | $408K |
| 7 | 98506 | Olympia | 82 | B | 7 (2 health) | $470K |
| 8 | 98501 | Olympia | 80 | B | 9 (1 health) | $485K |
| 9 | 98502 | Olympia | 69 | C | 34 (8 health) | $497K |
| 10 | 98504 | Olympia | — | — | — | |
| 11 | 98505 | Olympia | — | — | 1 | — |
| 12 | 98507 | Olympia | — | — | — | |
| 13 | 98508 | Olympia | — | — | — | |
| 14 | 98509 | Lacey | — | — | — | |
| 15 | 98511 | Tumwater | — | — | — | |
| 16 | 98530 | Bucoda | — | — | 2 | $219K |
| 17 | 98540 | East Olympia | — | — | — | |
| 18 | 98556 | Littlerock | — | — | — | |
| 19 | 98576 | Rainier | — | — | 2 | $400K |
| 20 | 98579 | Rochester | — | — | 0 | $406K |
| 21 | 98599 | Olympia | — | — | — |
Recommended Buyer Guides for Thurston County
Retailer arrangements don't shape what appears here - the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Water Filters for PFAS — PFAS detected in 1 ZIP code
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Thurston County, Washington
Overview
Thurston County in Washington covers 21 tracked ZIP records with an average Home Safety Score of A (89/100) across 9 scored records.
12 of 13 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 12 health-based violations appear in the available health breakdown.
← Back to Washington Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.