Water Quality: Issaquah, WA
4 water systems • 43,739 people served
Some Concerns142
Total Violations
1
Health-Based Violations
4
Water Systems
43,739
Population Served
Water Quality Summary
Issaquah has 1 health-based violation on record, meaning one or more contaminants were found above EPA-established safe levels. Contaminants involved: E. coli. In total, 142 violations are on record for 4 water systems serving 43,739 people.
Contaminants Found
E. coli
Water Systems Serving Issaquah
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| ISSAQUAH WATER SYSTEM | WA5336350 | Surface Water | 43,584 | 3 |
| ISSAQUAH VALLEY WATER ASSN #1 | WA5336300 | Groundwater | 80 | 10 |
| ALPINE MOBILE MANOR | WA5301830 | Groundwater | 45 | 12 |
| TIGER MTN TRACTS | WA5388315 | Groundwater | 30 | 117 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.