Nogales Wash

The Arizona Department of Environmental Quality (ADEQ) continues to caution against contact with water in the Nogales Wash and Potereo Creek due to an on-going potential for intermittent sanitary sewer overflows (SSOs) in a tunnel under the international border. This tunnel was built to transport stormwater from Nogales, Sonora to the Santa Cruz River.

As work continues on the International Outfall Interceptor (IOI) and the Nogales Wash, Santa Cruz County Health Services continues to remind the public to stay out of the Nogales Wash and Santa Cruz River due to continued health concerns and water quality. Health Officials continue to recommend to those who live within the county, along the Santa Cruz River, and have a private well within 100 ft. of the waterway have their wells tested for contamination.
 

Progress is ongoing in repairing the partial breach in the International Outfall Interceptor (IOI).

Officials ask that the public refrain from entering this area to allow agencies representatives to conduct their surveys and for the safety of the employees working in the area.

The Nogales International Airport has issued a Notice to Airmen (NOTAM) for a one nautical mile around the worksite. Officials have requested that drone use be restricted in the areas crews are working.

Progress is ongoing in repairing the partial breach in the International Outfall Interceptor (IOI).

Officials ask that the public refrain from entering this area to allow agencies representatives to conduct their surveys and for the safety of the employees working in the area.

The Nogales International Airport has issued a Notice to Airmen (NOTAM) for a one nautical mile around the worksite. Officials have requested that drone use be restricted in the areas crews are working.

Governor Doug Ducey today declared a state of emergency following the rupture of a sewage conveyance pipeline near Nogales, Arizona and sent a letter of request to the U.S. Army Corps of Engineers asking for assistance in flood and damage mitigation efforts. The emergency declaration follows similar declarations from Santa Cruz County and the City of Nogales and makes available additional state resources for the response effort.

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. The location of the partial breach is in a sparsely populated area of the county.
 

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