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 and Forms page.
Contents/Downloads
Coliform information Packet webpage
Revised Total Coliform Rule (RTCR) webpage
Preparing a Coliform Monitoring Plan webpage
Routine Coliform Monitoring Requirements webpage
Preparing a Coliform Monitoring Plan: For large or multiple-source systems 331-036 (PDF)
Preparing a Coliform Monitoring Plan: For systems with one supply source 331-240 (PDF)
Coliform Sampling Procedure 331-225 (PDF)
Correct Completion of a Coliform Sample Lab Slip 331-247 (PDF)
Follow-up to an Unsatisfactory Coliform Sample 331-187 (PDF)
Coliform Bacteria and Drinking Water 331-181 (PDF)
Types of Coliform Violations for Group A Public Water Systems 331-206 (PDF)
Troubleshooting Checklist for Coliform Contamination 331-180 (PDF)
Emergency Disinfection of Small Water Systems 331-242 (PDF)
- Emergency Disinfection of Small Water Systems 331-242-Russian (PDF)
- Emergency Disinfection of Small Water Systems 331-242-Spanish (PDF)
- Emergency Disinfection of Small Water Systems 331-242-Tagalog (PDF)
- Emergency Disinfection of Small Water Systems 331-242-Ukrainian (PDF)
- Emergency Disinfection of Small Water Systems 331-242-Vietnamese (PDF)
Office of Drinking Water Authority Over Operators and Water Systems 331-449 (PDF)
For more information
You can get a hardcopy of this packet from our regional offices below or order one from our Publications and Forms page.
Eastern Region: Spokane Valley 509-329-2100
Northwest Region: Kent 253-395-6750
Southwest Region: Tumwater 360-236-3030