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Public Notice: Proposed NPDES Permit Renewal; Northwest Water Reclamation Plant, Mesa, Arizona

Publish Date: 04/11/2019


The U.S. Environmental Protection Agency, Region IX (EPA) is issuing a notice of proposed action under the Clean Water Act (CWA). EPA is proposing to reissue the National Pollutant Discharge Elimination System (NPDES) permit AZ0024627 to:

City of Mesa, Water Reclamation Department
640 N. Mesa Drive
P.O. Box 1466
Mesa, AZ 85211-1466


Northwest Water Reclamation Plant
960 North Riverview
Mesa, AZ 85201

The Northwest Water Reclamation Plant (NWWRP) is owned and operated by the City of Mesa, located at 960 North Riverview in the City of Mesa in Maricopa County, Arizona. The NWWRP collects and treats wastewater from the service area for the northwest portion of the City of Mesa, constituting a population of approximately 120,000 residents. The plant has a design flow of 18 million gallons per day (MGD) to secondary treatment levels and the proposed permit allows for intermittent and/or emergency dischargers to outfalls located on the Salt River Pima Maricopa Indian Community (SRPMIC) tribal land. The previous permit expired on July 31 2018 but following a timely submittal of a completed application for renewal the permit has been administratively extended until issuance of a renewed permit.

The receiving water for the treated effluent discharged from NWWRP Outfalls #002 and #005 is the Salt River in the Middle Gila watershed located at the following locations:

Outfall 002 is located at:

Latitude 33° 27′ 25″ N,
Longitude 111° 50′ 25″ W

Outfall 005 is located at:

Latitude 33 ° 29′ 05″ N ,
Longitude 111° 44′ 48″ W

The permit has been drafted to protect the following designated uses: Aquatic and Wildlife ephemeral and Partial Body Contact and has established permit limits and conditions that are designed to protect the uses of the river and not contribute to any further degradation.

Applicant or Respondent

City of Mesa, Water Reclamation Department
640 N. Mesa Drive
P.O. Box 1466
Mesa, AZ 85211-1466

Permit #: NPDES Permit No. AZ0024627