Respondent, Rancho Ruidoso Valley Estates, owned or operated an industrial domestic sewage treatment facility, located in Lincoln County, New Mexico. Respondent is a municipality operating the Rancho Ruidoso Valley Estates wastewater treatment plant that discharges to the Pecos River Basin. The Respondent was in violation of the National Pollutant Discharge Elimination System (NPDES) permit. The Respondent is subject to regulations of the Clean Water Act (CWA).