What is the address of Watertown WWTP?

The address on the plant’s EPA facility record is 700 Lewis Ave N, Watertown, MN 55388, in Carver County. Its coordinates are 44.9710, -93.8399. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Watertown WWTP treat?

Watertown WWTP treats an average of 0.33 MGD and is permitted for a design flow of 2.52 MGD.

What treatment technology does Watertown WWTP use?

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

What is the NPDES permit for Watertown WWTP?

The facility discharges under NPDES permit MN0020940, currently expired, expiring April 2024.

Is Watertown WWTP in compliance?

Discharge monitoring reports show 8 violations at Watertown WWTP in the last three years, 7 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Watertown WWTP and how do I contact them?

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

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Watertown WWTP

700 Lewis Ave N, Watertown, MN 55388 · Carver County · Publicly Owned Treatment Works

Average flow: 0.33 MGD

Design flow: 2.52 MGD

NPDES permit: MN0020940; Expired

Permit expires: April 2024

Population served: 4,771; CWNS 2022

Watertown WWTP is a publicly owned wastewater treatment works in Watertown, Carver County, Minnesota treating an average of 0.33 million gallons per day against a permitted design capacity of 2.52 MGD, serving about 4,771 residents. It discharges under NPDES permit MN0020940 (expired), which expires in April 2024, with 8 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Watertown WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 8

Effluent violations: 7

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

1 verified contact for Watertown WWTP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Watertown WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Minnesota

Delano WWTP

Delano · 6 mi away

0.57 MGD

Montrose WWTP

Montrose · 7 mi away

0.33 MGD

Mayer WWTP

Mayer · 7 mi away

0.14 MGD

New Germany WWTP

New Germany · 8 mi away

—

Greenfield WWTP

Greenfield · 9 mi away

0.01 MGD

Rockford WWTP

Rockford · 10 mi away

0.29 MGD

Winsted

Winsted · 10 mi away

0.23 MGD

Buffalo WWTP

Buffalo · 11 mi away

1.08 MGD

Watertown 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 April 4, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms

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