Santa Cruz County has received the test results from the Arizona Department of Environmental Quality. Initial ADEQ samples found levels of E. coli bacteria that exceeded recommended levels, both below and above the partial breach. Further sampling is being conducted with results still pending.
During an inspection of the International Outfall Interceptor (IOI) on July 25, the City of Nogales public works reported a partial breach of the IOI approximately 200 yards north of the intersection of Old Tucson Rd. and the Nogales Wash.
A dislodged section of cement that encases one of the manhole accesses to the IOI, partially sheared the pipe below the waterline causing discharge of untreated wastewater into the Nogales Wash.