Ackley WWTP
410 main ST, Ackley, IA 50601 · Hardin County · Publicly Owned Treatment Works
- Average flow
- 0.59 MGD
- Design flow
- 1.67 MGD
- NPDES permit
- IA0035297
- Effective
- Permit expires
- May 2030
- Population served
- 1,661
- CWNS 2022
Ackley WWTP is a publicly owned wastewater treatment works in Ackley, Hardin County, Iowa treating an average of 0.59 million gallons per day against a permitted design capacity of 1.67 MGD, serving about 1,661 residents. It discharges under NPDES permit IA0035297 (effective), which expires in May 2030, with 88 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in April 2013.
Treatment technology
2 treatment structures and unit processes identified at Ackley WWTP.
Available with a free Klarifi account
See the full treatment train at Ackley WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 88
- Effluent violations
- 67
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Ackley WWTP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $3.9M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Apr 2013
CITY OF ACKLEY, IOWA
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $3.9M
Source: EPA ECHO, civil enforcement case 07-2008-0307.
Full case history with a free Klarifi account
Every action against Ackley WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for Ackley WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Ackley WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Aplington · 9 mi away
0.13 MGD
Wellsburg · 9 mi away
0.08 MGD
Steamboat Rock · 10 mi away
0.02 MGD
Iowa Falls · 11 mi away
1.02 MGD
Eldora · 13 mi away
0.59 MGD
Parkersburg · 14 mi away
0.21 MGD
Dumont · 14 mi away
0.26 MGD
Holland · 16 mi away
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Ackley WWTP: 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 August 3, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms