COUNTY REPORT WA

Whitman County, Washington

23 ZIP codes · Avg score 82/100 · Grade B

ZipCheckup grade for Whitman County: B.

This ZIP has a few items worth a quick check.

ZipCheckup rates Whitman County in the top two of its five grades; 23 ZIP codes are tracked there.

How Whitman County Compares

Whitman County82/100
Washington avg86/100
National avg73/100

How Whitman County Compares

B
County Grade
82/100
Avg Safety Score
23
ZIP Codes
3
Water Systems

Whitman County scores 4 points below the Washington state average (86/100) and 9 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

B
County Grade
82
Avg Safety Score
23
ZIP Codes
Best ZIP: 99163 (82/100)
Lowest ZIP: 99111 (81/100)
$233K
Median Home Value

ZIP Code Risk Map

Water Quality Map: Whitman 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: 9.9 (asthma 12%, diabetes 7.4%)

Modeled additional annual cost estimate per homeowner: $927, largest modeled factor: Energy Code Gap

54% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 12% (national: 8.9%)
Diabetes 7.4% (national: 10.5%)
Obesity 28.5% (national: 32.4%)

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

Infrastructure Overview

1952
Median Build Year
54%
Pre-1980 Housing
48/100
Infrastructure Stress Indicator
82%
ZIPs with High Infrastructure Stress
High
Lead Pipe Risk

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: $927

Energy Code Gap $513/yr
Flood $400/yr
Water / Lead $317/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

21,072 housing units in Whitman County

Pre-1940 17%
1940–1959 11%
1960–1979 26%
1980–1999 25%
2000+ 20%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Health Outcomes vs National Average

CDC PLACES data for Whitman County residents

Asthma 12% (US avg: 8.9%)
Diabetes 7.4% (US avg: 11%)
Obesity 28.5% (US avg: 32.4%)

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

Water systems mapped to Whitman County ZIP codes

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

Systems with the most violations in Whitman County

2 water systems with violations in EPA records.

All ZIP Codes in Whitman County

23 ZIP codes tracked in Whitman County.

# ZIP Code City Safety Score Grade Violations Home Value
1 99163 Pullman 82 B 4 $413K
2 99111 Colfax 81 B 8 $264K
3 99017 Lamont — — $106K
4 99033 Tekoa — — $272K
5 99102 Albion — — $171K
6 99104 Belmont — — —
7 99113 Colton — — 4 $356K
8 99125 Endicott — — $172K
9 99128 Farmington — — $300K
10 99130 Garfield — — $211K
11 99136 Hay — — $119K
12 99143 Lacrosse — — $120K
13 99149 Malden — — $74K
14 99158 Oakesdale — — $242K
15 99161 Palouse — — $286K
16 99164 Pullman — — —
17 99165 Pullman — — —
18 99170 Rosalia — — $216K
19 99171 Saint John — — $210K
20 99174 Steptoe — — $225K
21 99176 Thornton — — $258K
22 99179 Uniontown — — $324K
23 99333 Hooper — — $557K

Recommended Buyer Guides for Whitman County

Each guide below is listed with the reason it appears.

Overview

Whitman County in Washington covers 23 tracked ZIP records with an average Home Safety Score of B (82/100) across 2 scored records.

3 of 3 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. The available record reports no health-based violations for this measured scope.

← 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 Whitman County?
Whitman County receives an average Home Safety grade of B from its scored ZIP records (23 ZIP codes tracked); this is a composite index, not a tap-water test.
How many water systems serve Whitman County?
We map 3 public water systems to 23 ZIP codes in our data for Whitman County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Whitman County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Whitman County is energy code gap. Across all modeled risk factors, the estimated average additional annual cost is $927 per homeowner; actual costs vary by home.
How old are homes in Whitman County?
The median home build year in Whitman County is 1952. 54% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does Whitman County compare to Washington?
Whitman County has an average Home Safety Score of 82/100 under model 4.0.0, which is below the Washington state average of 86/100.

How to cite this page

APA ZipCheckup. (2026). Whitman County, WA: HSS 82/100; 8 Violations. https://zipcheckup.com/county/washington/whitman/
BibTeX
@misc{zipcheckup-county-washington-whitman,
  author = {{ZipCheckup}},
  title  = {{Whitman County, WA: HSS 82/100; 8 Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/washington/whitman/}
}

Page version: October 2026.

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