Tuba City WWTP
5 Miles Southwest Of Tuba City, Tuba City, AZ 86045 · Coconino County · Publicly Owned Treatment Works
- Average flow
- 0.44 MGD
- Design flow
- 1.1 MGD
- NPDES permit
- NN0020290
- Effective
- Permit expires
- April 2027
- Population served
- —
- CWNS 2022
Tuba City WWTP is a publicly owned wastewater treatment works in Tuba City, Coconino County, Arizona treating an average of 0.44 million gallons per day against a permitted design capacity of 1.1 MGD. It discharges under NPDES permit NN0020290 (effective), which expires in April 2027, with 138 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in August 2024.
Treatment technology
One treatment structure or unit process identified at Tuba City WWTP.
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See the full treatment train at Tuba City WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 138
- Effluent violations
- 94
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Tuba City WWTP in EPA's ICIS system.
- Formal actions
- 3
- 1 since FY2020
- Compliance actions
- $101M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Aug 2024
NTUA Tuba City WWTP
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $757,617
EPA's description of the case:
“This is an Administrative Order on Consent (AOC) between the Navajo Tribal Utility Authority (NTUA) and the U.S. EPA to achieve compliance with the Clean Water Act and the Facility's National…”
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Source: EPA ECHO, civil enforcement case 09-2016-1512.
Full case history with a free Klarifi account
Every action against Tuba City WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
4 verified contacts for Tuba City WWTP, with validated emails and direct phone numbers.
Unlock 4 verified contacts (1 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Tuba City WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Arizona
Grand Canyon · 48 mi away
0.07 MGD
Flagstaff · 65 mi away
2.15 MGD
Kayenta · 74 mi away
0.26 MGD
Williams · 76 mi away
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Winslow · 79 mi away
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Chinle · 95 mi away
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Ganado · 100 mi away
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Holbrook · 103 mi away
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Tuba City WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated October 10, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms