0.5 Mi South & 0.25 Mi East Of Washington & Logan, Ayrshire, IA 50515 · Palo Alto County · Publicly Owned Treatment Works
Ayrshire, City Of STP is a publicly owned wastewater treatment works in Ayrshire, Palo Alto County, Iowa. It discharges under NPDES permit IA0079677 (administratively continued), which expires in July 2021, with 3 recorded violations in the last three years.
One treatment structure or unit process identified at Ayrshire, City Of STP.
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See the full treatment train at Ayrshire, City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
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0.1 MGD
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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 August 13, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms