Rio De Flag WWTP
600 S Babbitt Dr, Flagstaff, AZ 86001 · Coconino County · Publicly Owned Treatment Works
- Average flow
- 2.15 MGD
- Design flow
- 4 MGD
- NPDES permit
- AZ0023639
- Effective
- Permit expires
- April 2030
- Population served
- 26,185
- CWNS 2022
Rio De Flag WWTP is a publicly owned wastewater treatment works in Flagstaff, Coconino County, Arizona treating an average of 2.15 million gallons per day against a permitted design capacity of 4 MGD, serving about 26,185 residents. It discharges under NPDES permit AZ0023639 (effective), which expires in April 2030, with 2 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Rio De Flag WWTP.
Available with a free Klarifi account
See the full treatment train at Rio De Flag WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
5 verified contacts for Rio De Flag WWTP, with validated emails and direct phone numbers.
Unlock 5 verified contacts (2 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Rio De Flag WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Arizona
Williams · 31 mi away
—
Cottonwood · 39 mi away
1.02 MGD
Winslow · 54 mi away
—
Grand Canyon · 61 mi away
0.07 MGD
Prescott Valley · 62 mi away
2.69 MGD
Tuba City · 65 mi away
0.44 MGD
Payson · 68 mi away
0.79 MGD
Holbrook · 84 mi away
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Rio De Flag 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 12, 2026; facility record last updated November 3, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms