The City of Rio Rancho was issued an Administrative Order (AO) for violation of Clean Water Act (CWA) regulations and their National Pollutant Discharge Elimination System (NPDES) permit. The City of Rio Rancho is a municipality which operates a waste water treatment facility, located in Rio Rancho, Sandoval County, New Mexico and is subject to the regulations of the Clean Water Act (CWA) and National Pollutant Discharge Elimination System (NPDES) program. The City of Rio Rancho is in violation of the CWA and its NPDES permit for sanitary sewer overflows and other unauthorized discharges.