New Plymouth Sewage Lagoon
4615 NW 1st Ave, New Plymouth, ID 83655 · Payette County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.6 MGD
- NPDES permit
- ID0020389
- Administratively continued
- Permit expires
- August 2021
- Population served
- 1,493
- CWNS 2022
New Plymouth Sewage Lagoon is a publicly owned wastewater treatment works in New Plymouth, Payette County, Idaho, serving about 1,493 residents. It discharges under NPDES permit ID0020389 (administratively continued), which expires in August 2021, with 30 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at New Plymouth Sewage Lagoon.
Available with a free Klarifi account
See the full treatment train at New Plymouth Sewage Lagoon: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 30
- 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 New Plymouth Sewage Lagoon.
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Nearby wastewater treatment plants in Idaho
Fruitland · 7 mi away
—
Payette · 8 mi away
0.7 MGD
Payette · 10 mi away
0.84 MGD
Parma · 16 mi away
0.18 MGD
Emmett · 16 mi away
1.68 MGD
Notus · 18 mi away
0.06 MGD
Weiser · 20 mi away
0.87 MGD
Greenleaf · 21 mi away
0.06 MGD
New Plymouth Sewage Lagoon: 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 September 11, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms