June 17, 2026
Bacteria & Pathogens in Washington Drinking Water 2026
Bacteria & Pathogens in Washington Drinking Water 2026
Bacteria & Pathogens contamination has been detected in drinking water systems across Washington. Bacteria including E. coli and coliforms indicate sewage contamination and can cause gastrointestinal illness. Our analysis of Washington water quality reports found Bacteria & Pathogens present in 11 cities and water systems statewide. If you live in one of these communities, a certified home filter can significantly reduce your exposure -- browse Bacteria & Pathogens filters at PureWaterGuys.
Cities in Washington with Bacteria & Pathogens Detected
The following 11 water systems in Washington reported Bacteria & Pathogens in their annual water quality reports. Click any city to read the full report.
| City / Water System | Water Quality Report |
|---|---|
| Chattaroy Wa Water Quality Report 2026 | View Report |
| Des Moines Wa Water Quality Report 2026 | View Report |
| Fall City Wa Water Quality Report 2026 | View Report |
| Joyce Wa Water Quality Report 2026 | View Report |
| Lacrosse Wa Water Quality Report 2026 | View Report |
| Langley Wa Water Quality Report 2026 | View Report |
| Mattawa Wa Water Quality Report 2026 | View Report |
| Oysterville Wa Water Quality Report 2026 | View Report |
| Republic Wa Water Quality Report 2026 | View Report |
| Selah Wa Water Quality Report 2026 | View Report |
| Zillah Wa Water Quality Report 2026 | View Report |
What Does This Mean For You?
Detecting Bacteria & Pathogens in your water supply does not necessarily mean immediate danger, but long-term exposure -- even at low levels -- carries measurable health risk. UV purification systems and sub-micron filters (0.2 micron) eliminate bacteria and pathogens.
Our recommendation: View Bacteria & Pathogens filters certified for Washington water conditions or take our free Water Finder Quiz to get a personalized recommendation.
Filter Bacteria & Pathogens From Your Washington Tap Water
PureWaterGuys carries NSF-certified filters proven to reduce Bacteria & Pathogens and other contaminants found in Washington water.
Shop Bacteria & Pathogens Filters Take the Water QuizFrequently Asked Questions
What is Bacteria & Pathogens?
Bacteria including E. coli and coliforms indicate sewage contamination and can cause gastrointestinal illness.
Is Washington tap water safe to drink?
Water quality varies by city. Of the Washington systems we analyzed, 11 detected Bacteria & Pathogens. Most levels are below EPA action thresholds, but long-term low-level exposure carries health risk. Check your city's report above or use a certified home filter as a precaution.
What filter removes Bacteria & Pathogens from tap water?
UV purification systems and sub-micron filters (0.2 micron) eliminate bacteria and pathogens. See our Bacteria & Pathogens filter options.
Data sourced from EPA-mandated annual water quality reports (Consumer Confidence Reports). Last updated: 2026. Not all systems are required to test for every contaminant.