What is the address of Selby, City Of?

The address on the plant’s EPA facility record is PO Box 346, Selby, SD 57472, in Walworth County. Its coordinates are 45.5017, -100.0405. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Selby, City Of treat?

Selby, City Of is permitted for a design flow of 0.09 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Selby, City Of use?

Klarifi has identified one treatment structure or unit process at the Selby facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Selby, City Of?

The facility discharges under NPDES permit SD0021717, currently administratively continued, expiring May 2026.

Is Selby, City Of in compliance?

Discharge monitoring reports show 84 violations at Selby, City Of in the last three years. The full history is available in Klarifi.

Who operates Selby, City Of and how do I contact them?

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

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Selby, City Of

PO Box 346, Selby, SD 57472 · Walworth County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.09 MGD

NPDES permit: SD0021717; Administratively continued

Permit expires: May 2026

Population served: —; CWNS 2022

Selby, City Of is a publicly owned wastewater treatment plant in Selby, Walworth County, South Dakota. It discharges under NPDES permit SD0021717 (administratively continued), which expires in May 2026, with 84 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Selby, City Of.

Available with a free Klarifi account

See the full treatment train at Selby, City Of: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 84

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 Selby, City Of.

No verified contacts on file yet

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Selby, City 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 October 26, 2026; facility record last updated April 24, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms

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