This memorandum provides guidance to primacy agencies with enforcement responsibility under the Safe Drinking Water Act (SDWA) concerning the requirements to transition public water systems (PWSs) from the Total Coliform Rule (TCR) to the Revised Total Coliform Rule (RTCR). This transition started April 1, 2016 or on an earlier State effective date, whichever comes first.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Requirements and State Reporting Guidance to Transition Public Water Systems from the Total Coliform Rule to the Revised Total Coliform Rule (PDF)(11 pp, 994 K, December 4, 2015, WSG 199)