COUNTY REPORT WA

Thurston County, Washington

21 ZIP codes · Avg score 89/100 · Grade A

ZipCheckup grade for Thurston County: A.

Checked records flag no major concern; missing data is unknown.

Residents of Thurston County can read the A-B grade as a starting point and then open their own ZIP report, one of 21 on this site.

How Thurston County Compares

Thurston County89/100
Washington avg86/100
National avg73/100

How Thurston County Compares

A
County Grade
89/100
Avg Safety Score
21
ZIP Codes
32
Water Systems

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

A
County Grade
89
Avg Safety Score
21
ZIP Codes
Best ZIP: 98512 (98/100)
Lowest ZIP: 98502 (69/100)
$431K
Median Home Value
$700
Avg Remediation (0.16% of home value)

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.

A B C D F

Key Risk Factors

Health risk index: 11.8 (asthma 11.2%, diabetes 10.3%)

Modeled additional annual cost estimate per homeowner: $3,814, largest modeled factor: Sea Level

County Health Indicators vs National Average

Asthma 11.2% (national: 8.9%)
Diabetes 10.3% (national: 10.5%)
Obesity 31.2% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

33/100
Infrastructure Stress Indicator
5%
ZIPs with High Infrastructure Stress

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $3,814

Sea Level Rise $3,000/yr
Flood $938/yr
Energy Code Gap $300/yr

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

$431K
Median Home Value
$700
Est. Remediation Cost
0.2%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Thurston County can be compared with the median property value; actual costs vary by property.

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

Asthma 11.2% (US avg: 8.9%)
Diabetes 10.3% (US avg: 11%)
Obesity 31.2% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems mapped to Thurston County ZIP codes

8 community water systems mapped to Thurston County ZIP codes; EPA may list more systems serving the county.

Show all 8 water systems

32 water systems mapped to Thurston County ZIP codes in our data; EPA may list more systems serving the county.

Systems with the most violations in Thurston County

5 water systems with violations in EPA records.

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

The mix of guides changes from county to county.

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

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Thurston County?
Thurston County receives an average Home Safety grade of A from its scored ZIP records (21 ZIP codes tracked); this is a composite index, not a tap-water test.
How many water systems serve Thurston County?
We map 32 public water systems to 21 ZIP codes in our data for Thurston County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Thurston County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Thurston County is sea level. Across all modeled risk factors, the estimated average additional annual cost is $3,814 per homeowner; actual costs vary by home.
How does Thurston County compare to Washington?
Thurston County has an average Home Safety Score of 89/100 under model 4.0.0, which is at or above the Washington state average of 86/100.

How to cite this page

APA ZipCheckup. (2026). Thurston County, WA: HSS 89/100; PFAS Found in Water. https://zipcheckup.com/county/washington/thurston/
BibTeX
@misc{zipcheckup-county-washington-thurston,
  author = {{ZipCheckup}},
  title  = {{Thurston County, WA: HSS 89/100; PFAS Found in Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/washington/thurston/}
}

Page version: October 2026.

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