Le Mars City Of STP
705 5th Avenue NW, Le Mars, IA 51031 · Plymouth County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 4.73 MGD
- NPDES permit
- IA0036536
- Effective
- Permit expires
- July 2029
- Population served
- 10,571
- CWNS 2022
Le Mars City Of STP is a publicly owned wastewater treatment works in Le Mars, Plymouth County, Iowa, serving about 10,571 residents. It discharges under NPDES permit IA0036536 (effective), which expires in July 2029, with 2 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Le Mars City Of STP.
Available with a free Klarifi account
See the full treatment train at Le Mars City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Industrial users and pretreatment
Industries that discharge process wastewater to Le Mars City Of STP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: Dfa Dairy Brands Fluid , Llc Dba Kemps (Le Mars). Most users are in food and beverage.
Unlock the details behind these industrial users
Discharge flow, federal category, source documents and contacts for every industrial user of Le Mars City Of STP. Free with a Klarifi account.
Key contacts
Decision-makers at Le Mars City Of STP.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Iowa
Brunsville · 3 mi away
—
Merrill · 6 mi away
0.04 MGD
Oyens · 8 mi away
—
Maurice · 12 mi away
—
Remsen · 12 mi away
0.2 MGD
Hinton · 13 mi away
0.04 MGD
Ireton · 14 mi away
—
Orange City · 15 mi away
0.85 MGD
Le Mars 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 March 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms