How much wastewater does Keystone, Town Of treat?

Keystone, Town Of treats an average of 0.14 MGD and is permitted for a design flow of 0.3 MGD.

What is the NPDES permit for Keystone, Town Of?

The facility discharges under NPDES permit SD0024007, currently administratively continued, expiring June 2025.

Is Keystone, Town Of in compliance?

Discharge monitoring reports show 21 violations at Keystone, Town Of in the last three years, 21 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Keystone, Town Of and how do I contact them?

Keystone, Town Of is a publicly owned treatment works in Keystone, South Dakota. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Keystone, Town Of

Keystone, SD · Pennington County · Publicly Owned Treatment Works

Average flow: 0.14 MGD

Design flow: 0.3 MGD

NPDES permit: SD0024007; Administratively continued

Permit expires: June 2025

Population served: —; CWNS 2022

Keystone, Town Of is a publicly owned wastewater treatment plant in Keystone, Pennington County, South Dakota treating an average of 0.14 million gallons per day against a permitted design capacity of 0.3 MGD. It discharges under NPDES permit SD0024007 (administratively continued), which expires in June 2025, with 21 recorded violations in the last three years.

Treatment technology

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

Treatment structure data not yet analyzed for this facility.

Compliance snapshot (last 3 years)

Total violations: 21

Effluent violations: 21

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

1 verified contact for Keystone, Town Of, with validated emails and direct phone numbers.

Unlock 1 verified contact

Names, validated emails and direct phone numbers for decision-makers at Keystone, Town Of, plus the full compliance history and discharge data.

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Keystone, Town Of: 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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