What is the address of Matsunk STP?

The address on the plant’s EPA facility record is 600 Mccoys Ln, King Of Prussia, PA 19406, in Montgomery County. Its coordinates are 40.0934, -75.3294. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Matsunk STP treat?

Matsunk STP treats an average of 2.45 MGD and is permitted for a design flow of 5.5 MGD.

What treatment technology does Matsunk STP use?

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

What is the NPDES permit for Matsunk STP?

The facility discharges under NPDES permit PA0026085, currently effective, expiring June 2029.

Is Matsunk STP in compliance?

Discharge monitoring reports show 1 violation at Matsunk STP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Matsunk STP and how do I contact them?

Matsunk STP is a publicly owned treatment works in King Of Prussia, Pennsylvania. Klarifi lists 3 verified decision-maker contacts for this facility, available with a free trial.

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Matsunk STP

600 Mccoys Ln, King Of Prussia, PA 19406 · Montgomery County · Publicly Owned Treatment Works

Average flow: 2.45 MGD

Design flow: 5.5 MGD

NPDES permit: PA0026085; Effective

Permit expires: June 2029

Population served: —; CWNS 2022

Matsunk STP is a publicly owned wastewater treatment works in King Of Prussia, Montgomery County, Pennsylvania treating an average of 2.45 million gallons per day against a permitted design capacity of 5.5 MGD. It discharges under NPDES permit PA0026085 (effective), which expires in June 2029, with 1 recorded violation in the last three years.

Treatment technology

One treatment structure or unit process identified at Matsunk STP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 1

Effluent violations: 1

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

Key contacts

3 verified contacts for Matsunk STP, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Pennsylvania

Bridgeport Boro STP

Bridgeport · 1 mi away

0.39 MGD

E Norriton Plymouth /norristown

Plymouth Meeting · 1 mi away

4.25 MGD

Norristown Muni STP

Norristown · 1 mi away

4.87 MGD

Conshohocken Boro Auth

Conshohocken · 2 mi away

1.07 MGD

Whitemarsh STP

Lafayette Hill · 3 mi away

0.88 MGD

Upper Merion Twp. Auth-Trout R

King Of Prussia · 4 mi away

2.39 MGD

Ambler Boro Ms4 Ua

Ambler · 7 mi away

3.39 MGD

Oaks WWTP (lower Perkiomen Valley)

Oaks · 7 mi away

6.7 MGD

Matsunk STP: 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 12, 2026; facility record last updated August 18, 2026.

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

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