Kapowsin, WA Water Safety: 66/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
While Kapowsin avoids WA's lowest safety tiers, a portion of its water systems have logged documented violations.
How Kapowsin Compares
Data: EPA SDWIS Last verified: 2026-06-03
Who Supplies Your Water in Kapowsin
Across most of Kapowsin, WA, residential water comes from a single utility. That provider sets rates, manages infrastructure maintenance, and files compliance reports with the EPA on behalf of the households it serves. Federal tracking data shows 1 system on record, but one carries the bulk of the service load.
Overview
We track water quality and home safety data for 1 ZIP code in Kapowsin, Washington, covering 1 community water system serving approximately 1,474 people.
No EPA violations recorded across any ZIP codes in Kapowsin — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Kapowsin: C (66/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Kapowsin water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Kapowsin
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 98344 | C | GRAHAM HILL MUTUAL WATER CO INC | 1,474 |
All ZIP Codes in Kapowsin
- 98344 [C]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Kapowsin
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What You Can Do in Kapowsin
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Kapowsin, WA