Kapowsin, WA Water Safety: 66/100 (2026)
1 ZIP code · 1 water system · Updated 2026-07-19
ZipCheckup grade for Kapowsin: C.
A mixed picture - some signals here are worth your attention.
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: 2026-07-19
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.
- C
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 are recorded for the tracked water systems in Kapowsin as of the latest reporting period.
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