Revised Total Coliform Rule-Type 2 Water Supplies

The Total Coliform Rule (TCR), a National Primary Drinking Water Regulation, sets both health goals and legal limits for the presence of total coliforms in drinking water. The TCR requires all public water systems, both Community (Type I) and Non-Community (Type II), to monitor for the presence of total coliform bacteria in the distribution system.

Total Coliform Rule

The revised Total Coliform Rule, known as RTCR, went into effect April 1, 2016.

The RTCR applies to all Type II water supplies:

  • Transient
  • Non-transient
  • Year-round
  • Seasonal

View the Washtenaw County Environmental Health Division's presentation "The Revised Total Coliform Rule (RTCR) for Year-Round Non-Community (Type II) Water Supply's in Washtenaw County (PDF)" to see how the revised rule will affect your facility.


Other Helpful Links

More Information

If you have questions please contact Jennifer Conn, Washtenaw County Public Health Non-Community Public Water Supply Coordinator.