Mccall WWTP
325 Boydstun St, Mccall, ID 83638 · Valley County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 2.65 MGD
- NPDES permit
- ID0020231
- Administratively continued
- Permit expires
- April 2008
- Population served
- 4,733
- CWNS 2022
Mccall WWTP is a publicly owned wastewater treatment works in Mccall, Valley County, Idaho, serving about 4,733 residents. It discharges under NPDES permit ID0020231 (administratively continued), which expires in April 2008, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Mccall WWTP.
Available with a free Klarifi account
See the full treatment train at Mccall WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Mccall WWTP.
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Nearby wastewater treatment plants in Idaho
New Meadows · 10 mi away
—
Council · 20 mi away
0.12 MGD
Cascade · 27 mi away
—
Cambridge · 36 mi away
—
Riggins · 38 mi away
0.07 MGD
White Bird · 60 mi away
—
Weiser · 62 mi away
—
Horseshoe Bend · 68 mi away
0.07 MGD
Mccall 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 September 14, 2026; facility record last updated July 25, 2026.