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2026 Rankings

Grant County, Washington Home Safety Rankings - 15 ZIPs

Explore rankings under Home Safety Score model 4.0.0. Only ZIPs with all four required inputs are ranked; missing evidence is not imputed or reweighted.

Grant County, Washington (Washington) includes 15 tracked ZIP codes and 27 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.

Average Home Safety Grade: B (74/100)

Grade	ZIP Codes	%
A	0	0%
B	5	63%
C	2	25%
D	1	13%
F	0	0%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	98857	Warden	83	B
2	98926	Ellensburg	83	B
3	98942	Selah	82	B
4	99349	Mattawa	82	B
5	99344	Othello	80	B
6	98823	Ephrata	68	C
7	98848	Quincy	67	C
8	98837	Moses Lake	50	D

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	98837	Moses Lake	50	D	57 violations
2	98848	Quincy	67	C	132 violations
3	98823	Ephrata	68	C	48 violations
4	99344	Othello	80	B	12 violations
5	99349	Mattawa	82	B	2 violation(s)
6	98942	Selah	82	B	3 violation(s)
7	98926	Ellensburg	83	B	4 violations
8	98857	Warden	83	B	—

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Lead	17	4
Consumer Confidence Report Rule	15	7
Surface Water Treatment Rule	14	8
Nickel	10	4
PFOA	9	3
PFNA	9	3
Dichloroacetic Acid	9	3
Bromodichloromethane	9	3

Lead Risk

Average of reported 90th-percentile lead results: 0.0048 mg/L (below EPA action level)
0 of 10 ZIP codes with known status exceed EPA lead action level
9% of housing built before 1950
28% of housing built before 1970

Cities in This Metro

East Wenatchee, WA — 1 ZIP code
Ephrata, WA — 1 ZIP code
George, WA — 1 ZIP code
Marlin, WA — 1 ZIP code
Moses Lake, WA — 1 ZIP code
Quincy, WA — 1 ZIP code
Soap Lake, WA — 1 ZIP code
Stratford, WA — 1 ZIP code
Warden, WA — 1 ZIP code
Wilson Creek, WA — 1 ZIP code
Ellensburg, WA — 1 ZIP code
Selah, WA — 1 ZIP code
Othello, WA — 1 ZIP code
Mattawa, WA — 1 ZIP code
Royal City, WA — 1 ZIP code

All 15 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	98857	Warden	83	B	0
2	98926	Ellensburg	83	B	4
3	98942	Selah	82	B	3
4	99349	Mattawa	82	B	2
5	99344	Othello	80	B	12
6	98823	Ephrata	68	C	48
7	98848	Quincy	67	C	132
8	98837	Moses Lake	50	D	57
9	98802	East Wenatchee	—	—	6
10	98824	George	—	—	—
11	98832	Marlin	—	—	—
12	98851	Soap Lake	—	—	1
13	98860	Wilson Creek	—	—	—
14	99357	Royal City	—	—	—

Data Sources

Water quality: EPA SDWIS
Housing: U.S. Census Bureau American Community Survey
Flood: FEMA NFIP
Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.

Reporting periods vary by source; the page metadata identifies this materialization.

Methodology
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →

Disclaimer: Scores are based on EPA SDWIS reported data and are not a guarantee of current water safety. Water quality can change. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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How to cite this page

APA

ZipCheckup. (2026). Grant County, Washington Home Safety Rankings - 15 ZIPs. https://zipcheckup.com/rankings/metro/grant-washington/

BibTeX

@misc{zipcheckup-rankings-metro-grant-washington,
  author = {{ZipCheckup}},
  title  = {{Grant County, Washington Home Safety Rankings - 15 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/grant-washington/}
}

Page version: October 2026.

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