EPA Region 6 issued an Administrative Order (AO) to Winkler Water Supply Corporation (Respondent). EPA Region 6 issued the AO under its authority pursuant to Section 1414(g) of the Safe Drinking Water Act to Respondent at its water system in Streetman, Texas. The AO was issued in response to violations of the Revised Total Coliform Rule (RTCR). The AO requires Respondent to complete the required Site Sampling Plan and submit required documentation to the Texas Commission on Environmental Quality.