Revised Total Coliform Rule

The federal Safe Drinking Water Act (SDWA) requires that all public water systems (community and noncommunity) provide an adequate supply of safe drinking water to customers and consumers. The Michigan Department of Environment, Great Lakes, and Energy (EGLE) is responsible for implementing and managing the SDWA at the state level.  One of the regulations is the 1989 Total Coliform Rule (TCR). 

On April 1, 2016, the Revised Total Coliform Rule (RTCR) went into effect replacing the old regulations. The RTCR establishes a maximum contaminant level (MCL) for E. Coli and uses E. Coli and total coliforms to initiate a find and fix it approach to address potential avenues for the entrance into the distribution system.

Guidance and Training

Seasonal Start Up Certification Form & Procedures (Word)
Seasonal Public Groundwater Supply Handbook (PDF)

Seasonal Determination Chart (PDF)

Level 1 Assessment Fillable Form (Word)

USEPA RTCR Quick Reference Guide