Lonsdale WWTP
835 Industrial Park Dr SE, Lonsdale, MN 55046 · Rice County · Publicly Owned Treatment Works
- Average flow
- 0.28 MGD
- Design flow
- 0.69 MGD
- NPDES permit
- MN0031241
- Effective
- Permit expires
- July 2029
- Population served
- 4,418
- CWNS 2022
Lonsdale WWTP is a publicly owned wastewater treatment works in Lonsdale, Rice County, Minnesota treating an average of 0.28 million gallons per day against a permitted design capacity of 0.69 MGD, serving about 4,418 residents. It discharges under NPDES permit MN0031241 (effective), which expires in July 2029, with 0 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Lonsdale WWTP.
Available with a free Klarifi account
See the full treatment train at Lonsdale WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Lonsdale WWTP.
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Nearby wastewater treatment plants in Minnesota
Faribault · 6 mi away
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New Prague · 10 mi away
0.68 MGD
Northfield · 13 mi away
1.86 MGD
Kilkenny · 13 mi away
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Morristown · 17 mi away
0.06 MGD
Le Center · 17 mi away
0.43 MGD
Prior Lake · 18 mi away
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Jordan · 18 mi away
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Lonsdale 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 27, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms