How much wastewater does Spearfish, City Of (wtp) treat?

Spearfish, City Of (wtp) treats an average of 1.21 MGD.

What is the NPDES permit for Spearfish, City Of (wtp)?

The facility discharges under NPDES permit SDG860058, currently effective, expiring October 2027.

Is Spearfish, City Of (wtp) in compliance?

Discharge monitoring reports show 4 violations at Spearfish, City Of (wtp) in the last three years, 4 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Spearfish, City Of (wtp) and how do I contact them?

Spearfish, City Of (wtp) is a publicly owned treatment works in Spearfish, South Dakota. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Spearfish, City Of (wtp)

Spearfish, SD · Lawrence County · Publicly Owned Treatment Works

Average flow: 1.21 MGD

Design flow: —

NPDES permit: SDG860058; Effective

Permit expires: October 2027

Population served: 12,193; CWNS 2022

Spearfish, City Of (wtp) is a publicly owned wastewater treatment plant in Spearfish, Lawrence County, South Dakota treating an average of 1.21 million gallons per day, serving about 12,193 residents. It discharges under NPDES permit SDG860058 (effective), which expires in October 2027, with 4 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: 4

Effluent violations: 4

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

Key contacts

Decision-makers at Spearfish, City Of (wtp).

No verified contacts on file yet

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Spearfish, City Of (wtp): 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 December 24, 2024.

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