We developed the Coliform Information Packet webpage to help you better understand total coliform bacteria, what it is, how to test for it, and what to do if you find it in your water supply. You can get a hardcopy of this packet from our regional offices (see below) or order one from our publications page.
For more information
Eastern Region: Spokane Valley 509-329-2100
Northwest Region: Kent 253-395-6750
Southwest Region: Tumwater 360-236-3030
After-hours Emergency: 877-481-4901