What is the address of Sandstone?

The address on the plant’s EPA facility record is Rr 3 County Road 20, Sandstone, MN 55072, in Pine County. Its coordinates are 46.0990, -92.8273. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Sandstone treat?

Sandstone is permitted for a design flow of 0.38 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Sandstone use?

Klarifi has identified one treatment structure or unit process at the Sandstone facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Sandstone?

The facility discharges under NPDES permit MN0056910, currently effective, expiring March 2031.

Is Sandstone in compliance?

Discharge monitoring reports show 33 violations at Sandstone in the last three years, 10 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Sandstone and how do I contact them?

Sandstone is a publicly owned treatment works in Sandstone, Minnesota. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Sandstone

Rr 3 County Road 20, Sandstone, MN 55072 · 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. It discharges under NPDES permit MN0056910 (effective), which expires in March 2031, with 33 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Sandstone.

Available with a free Klarifi account

See the full treatment train at Sandstone: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 33

Effluent violations: 10

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.

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Nearby wastewater treatment plants in Minnesota

Hinckley WWTP

Hinckley · 7 mi away

0.23 MGD

Askov WWTP

Askov · 7 mi away

—

Finlayson WWTP

Finlayson · 8 mi away

—

Willow River WWTP

Willow River · 15 mi away

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Pine City

Pine City · 18 mi away

0.61 MGD

Moose Lake WWTP

Moose Lake · 24 mi away

—

Kettle River

Kettle River · 27 mi away

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Mora WWTP

Mora · 28 mi away

0.27 MGD

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 October 26, 2026; facility record last updated March 12, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms

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