PHOENIX – The National Park Service applied for a AZPDES permit renewal for the proposed discharge of up to 0.75 million gallons per day (mgd) of treated domestic wastewater from the South Rim WWTP to Bright Angel Wash in the Colorado-Grand Canyon River Basin in Township 31N, Range 2E, Section 26, in Coconino County, Arizona.

The facility is a federally owned treatment works that receives domestic wastewater from residential and commercial sources in the Grand Canyon National Park, South Rim Village, various visitor facilities, resident staff housing and lodging. Sludge is treated by aerobic digestion and drying beds, then transported by truck to off-site storage lagoons.

The Arizona Department of Environmental Quality (ADEQ) Water Quality Division welcomes comments on the AZPDES Permit renewal for Grand Canyon National Park- South Rim WWTP through December 30.

You can review public notices and related documents here.