NN0020265: Navajo Tribal Utility Authority (NTUA) Chinle Wastewater Treatment Plant and Collection System, Chinle, AZ

Discharger Name: Navajo Tribal Utility Authority (NTUA)
Discharger Address: P.O. Box 549, Chinle, Arizona 86503
Facility Name: Chinle Wastewater Treatment Plant and Collection System
Facility Location: 0.2 miles east of US Highway 191; 1.8 miles from NTUA Chinle District Office, Apache County, Arizona 86503
This permit was issued on: July 10, 2018
This permit shall become effective on: September 1, 2018
This permit shall expire at midnight on: August 31, 2023
Permit Status: Public comment period ends March 9, 2026.

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[DRAFT] NPDES Permit Fact Sheet: Chinle Wastewater Treatment Plant and Collection System, Chinle AZ (pdf) (572.15 KB, February 2026)
DRAFT EPA Fact Sheet for National Pollutant Discharge Elimination System (NPDES) Permit No. NN0020265 for Navajo Tribal Utility Authority (“NTUA”) Chinle Wastewater Treatment Lagoon, Chinle, Arizona 8650.
[DRAFT] NPDES Permit No. NN0020265: Chinle Wastewater Treatment Plant and Collection System (pdf) (1.27 MB, February 2026)
[DRAFT] Authorization to Discharge Under National Pollutant Discharge Elimination System (NPDES) Permit No. NN0020265 for Navajo Tribal Utility Authority (“NTUA”) Chinle Wastewater Treatment Lagoon, Chinle, Arizona 86503.
NPDES Permit No. NN0020265: NTUA Chinle Wastewater Treatment Lagoon (pdf) (1.04 MB, July 10, 2018)
Authorization to Discharge Under National Pollutant Discharge Elimination System (NPDES) Permit No. NN0020265 for Navajo Tribal Utility Authority (“NTUA”) Chinle Wastewater Treatment Lagoon, Chinle, Arizona 86503.
NPDES Permit Fact Sheet: NTUA Chinle Wastewater Treatment Lagoon (pdf) (1.41 MB, May 2018)
EPA Fact Sheet for National Pollutant Discharge Elimination System (NPDES) Permit No. NN0020265 for Navajo Tribal Utility Authority (“NTUA”) Chinle Wastewater Treatment Lagoon, Chinle, Arizona 86503.
CWA 401 Certification: NTUA Chinle Wastewater Treatment Lagoon (pdf) (174.05 KB, July 11, 2018)
Clean Water Act Section §401 Water Quality Certification for Navajo Tribal Utility Authority (“NTUA”) Chinle Wastewater Treatment Lagoon, Chinle, Arizona 86503.
EPA Letter and Response To Comments: NTUA Chinle Wastewater Treatment Lagoon (pdf) (206.46 KB, July 10, 2018)
EPA's letter to Navajo Tribal Utility Authority (“NTUA”) and response to comments received concerning the issuance of a National Pollutant Discharge Elimination System (NPDES) Permit No. NN0020265 for Chinle Wastewater Treatment Lagoon, Chinle, Arizona 86503.