How much wastewater does New Plymouth Sewage Lagoon treat?

New Plymouth Sewage Lagoon is permitted for a design flow of 0.6 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does New Plymouth Sewage Lagoon use?

Klarifi has identified uncovered lagoons at the New Plymouth facility.

What is the NPDES permit for New Plymouth Sewage Lagoon?

The facility discharges under NPDES permit ID0020389, currently administratively continued, expiring August 2021.

Is New Plymouth Sewage Lagoon in compliance?

Discharge monitoring reports show 30 violations at New Plymouth Sewage Lagoon in the last three years. The full history is available in Klarifi.

Who operates New Plymouth Sewage Lagoon and how do I contact them?

New Plymouth Sewage Lagoon is a publicly owned treatment works in New Plymouth, Idaho. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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New Plymouth Sewage Lagoon

New Plymouth, ID · 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. Treatment on site includes uncovered lagoons. It discharges under NPDES permit ID0020389 (administratively continued), which expires in August 2021, with 30 recorded violations in the last three years.

Treatment technology

Treatment structures identified at this facility. Exact unit counts are available in Klarifi.

Uncovered lagoons

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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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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 September 11, 2026; facility record last updated September 11, 2026.

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