Mill Creek, WA Water Safety: 66/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Water monitoring across Mill Creek paints a mid-range picture within WA — solid compliance in some service zones, documented concerns in others. Most violations on record are concentrated in specific areas, and the overall grade has held in the middle tier without major shifts in recent monitoring cycles.
How Mill Creek Compares
Data: EPA SDWIS Last verified: 2026-06-03
Mill Creek's Water Providers
In Mill Creek, WA, the drinking water supply is organized under a single dominant utility — a consolidated structure that shapes how infrastructure investment, regulatory compliance, and rate decisions flow to households. When one provider handles the overwhelming share of residential connections out of 1 tracked system, accountability is clear: service upgrades, EPA violation responses, and tariff changes all funnel through that single organizational structure.
Overview
We track water quality and home safety data for 1 ZIP code in Mill Creek, Washington, covering 1 community water system serving approximately 56,582 people.
No EPA violations recorded across any ZIP codes in Mill Creek — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Mill Creek: 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
Mill Creek water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Mill Creek
- 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 |
|---|---|---|---|
| 98082 | C | SILVER LAKE WATER & SEWER DISTRICT | 56,582 |
All ZIP Codes in Mill Creek
- 98082 [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.
Mill Creek Community Health Snapshot
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 Mill Creek
- 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 Mill Creek, WA