Kittitas County, Washington
10 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-06-03
Covering 10 ZIP codes, Kittitas County earns a high grade for tap water — most systems report zero health-based violations, and the overall compliance rate comfortably exceeds federal benchmarks.
How Kittitas County Compares
How Kittitas County Compares
Kittitas County scores 5 points below the Washington state average (78/100) and 5 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Kittitas County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.9 (asthma 11.3%, diabetes 9.7%)
Estimated additional annual cost per homeowner: $4,926, driven primarily by sea_level
Infrastructure: 0.344% avg pipe failure probability, 30% of ZIPs at high risk
60.4% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $4,926
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
24,189 housing units in Kittitas County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Kittitas County
Remediation costs are relatively manageable for most homeowners in Kittitas 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 Kittitas County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Kittitas County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Suncadia Resort | 2,640 | 17 |
| 2 | Cle Elum Water Department | 2,213 | 17 |
| 3 | City of Roslyn | 2,099 | 17 |
| 4 | KITTITAS CO WD #2 | 242 | 9 |
| 5 | Pineloch Sun Beach Club | 190 | 9 |
21 total water systems serve Kittitas County.
All ZIP Codes in Kittitas County
10 ZIP codes tracked in Kittitas County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 98943 | South Cle Elum | 83 | B | 0 | $375K |
| 2 | 98946 | Thorp | 83 | B | 1 | $446K |
| 3 | 98950 | Vantage | 83 | B | 1 | — |
| 4 | 98068 | Snoqualmie Pass | 81 | B | 1 | $761K |
| 5 | 98934 | Kittitas | 78 | B | 0 | $283K |
| 6 | 98940 | Ronald | 77 | B | 9 | $491K |
| 7 | 98926 | Ellensburg | 73 | B | 0 | $426K |
| 8 | 98941 | Roslyn | 72 | B | 3 (1 health) | $464K |
| 9 | 98925 | Easton | 55 | C | 0 | $783K |
| 10 | 98922 | Cle Elum | 49 | D | 5 | $625K |
Recommended Buyer Guides for Kittitas County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 60.4% of homes built before 1978
Deep Dive Reports
Detailed analysis for Kittitas County, Washington
Overview
Kittitas County in Washington covers 10 ZIP codes with an average Home Safety Score of B (73/100).
6 of 10 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Washington water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.