Sandstone
Sandstone, MN · Pine County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.38 MGD
- NPDES permit
- MN0056910
- Effective
- Permit expires
- March 2031
- Population served
- 2,462
- CWNS 2022
Sandstone is a publicly owned wastewater treatment plant in Sandstone, Pine County, Minnesota, serving about 2,462 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit MN0056910 (effective), which expires in March 2031, with 29 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 29
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Sandstone, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Sandstone, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Minnesota
Hinckley · 7 mi away
0.29 MGD
Askov · 7 mi away
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Finlayson · 8 mi away
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Willow River · 15 mi away
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Moose Lake · 24 mi away
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Kettle River · 27 mi away
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Mora · 28 mi away
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Barnum · 28 mi away
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Sandstone: 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 September 11, 2026; facility record last updated March 12, 2025.