Lake Lillian WWTP
18420 135th St SE, Lake Lillian, MN 56253 · Kandiyohi County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.05 MGD
- NPDES permit
- MNG585225
- Effective
- Permit expires
- November 2028
- Population served
- 246
- CWNS 2022
Lake Lillian WWTP is a publicly owned wastewater treatment works in Lake Lillian, Kandiyohi County, Minnesota, serving about 246 residents. It discharges under NPDES permit MNG585225 (effective), which expires in November 2028, with 5 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Lake Lillian WWTP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Lake Lillian WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Minnesota
Blomkest · 9 mi away
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Cosmos Township · 9 mi away
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Blomkest · 12 mi away
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Bird Island · 13 mi away
—
Atwater · 14 mi away
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Olivia · 14 mi away
0.27 MGD
Hector · 16 mi away
0.25 MGD
Danube · 16 mi away
—
Lake Lillian 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 September 24, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms