Denmark Sanitary District STP
North End Of 7th Street, Denmark, IA 52624 · Lee County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- IA0073326
- Effective
- Permit expires
- July 2031
- Population served
- 425
- CWNS 2022
Denmark Sanitary District STP is a publicly owned wastewater treatment works in Denmark, Lee County, Iowa, serving about 425 residents. It discharges under NPDES permit IA0073326 (effective), which expires in July 2031, with 3 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Denmark Sanitary District STP.
Available with a free Klarifi account
See the full treatment train at Denmark Sanitary District STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Denmark Sanitary District STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Denmark Sanitary District STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
West Point · 6 mi away
0.08 MGD
Middletown · 7 mi away
0.04 MGD
Danville · 7 mi away
0.1 MGD
Fort Madison · 9 mi away
1.65 MGD
Saint Paul · 9 mi away
—
New London · 12 mi away
0.26 MGD
Burlington · 13 mi away
5.79 MGD
Houghton · 14 mi away
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Denmark Sanitary District 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 March 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms