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The Revised Total Coliform Rule (RTCR) requires all public water supply systems (PWSs) to complete a Level 2 Assessment in response to the triggers identified RTCR Level 1 Assessment Small Systems <1000. Page 1 of 7 accordance with the EPA RTCR Assessments and Corrective Actions Guidance Manual. NJDEP USE ONLY.The Total Coliform Rule was revised to further protect human health. Guidance Manual called RTCR Assessments and Corrective Actions Guidance ManualOpens ○The State determines if the assessment is sufficient. EPA developed a RTCR Assessments and Corrective Actions. Guidance Manual – available on EPA and DWS This document aims to assist small water systems serving 1,000 or fewer persons in Why does the RTCR require assessment and corrective action? This manual is intended to provide information to assist public water systems in complying with the Level 1 and Level 2 assessment and corrective action