What is the address of Ashton City Of STP?

The address on the plant’s EPA facility record is 1st Street & Nettle Avenue (L, Ashton, IA 51232, in Osceola County. Its coordinates are 43.3097, -95.8008. For some plants the record holds the utility’s mailing address rather than the plant gate.

What treatment technology does Ashton City Of STP use?

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

What is the NPDES permit for Ashton City Of STP?

The facility discharges under NPDES permit IA0024457, currently effective, expiring July 2030.

Is Ashton City Of STP in compliance?

Discharge monitoring reports show 1 violation at Ashton City Of STP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Ashton City Of STP and how do I contact them?

Ashton City Of STP is a publicly owned treatment works in Ashton, Iowa. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Ashton City Of STP

1st Street & Nettle Avenue (L, Ashton, IA 51232 · Osceola County · Publicly Owned Treatment Works

Average flow: —

Design flow: —

NPDES permit: IA0024457; Effective

Permit expires: July 2030

Population served: 436; CWNS 2022

Ashton City Of STP is a publicly owned wastewater treatment works in Ashton, Osceola County, Iowa, serving about 436 residents. It discharges under NPDES permit IA0024457 (effective), which expires in July 2030, with 1 recorded violation in the last three years.

Treatment technology

One treatment structure or unit process identified at Ashton City Of STP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 1

Effluent violations: 1

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

Key contacts

1 verified contact for Ashton City Of STP, with validated emails and direct phone numbers.

Unlock 1 verified contact

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

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Little Rock City Of STP

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Sanborn WWTP

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Archer City Of STP

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Ashton City Of STP: 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 February 1, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms

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