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Hoosic Wastwater Treament Plant

667 Simonds Rd, Williamstown, MA 01267 · Berkshire County · Publicly Owned Treatment Works

Average flow
3.26 MGD
Design flow
6.5 MGD
NPDES permit
MA0100510
Effective
Permit expires
December 2028
Population served
22,403
CWNS 2022

Hoosic Wastwater Treament Plant is a publicly owned wastewater treatment plant in Williamstown, Berkshire County, Massachusetts treating an average of 3.26 million gallons per day against a permitted design capacity of 6.5 MGD, serving about 22,403 residents. It discharges under NPDES permit MA0100510 (effective), which expires in December 2028, with 2 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in October 2003.

Treatment technology

12 treatment structures and unit processes identified at Hoosic Wastwater Treament Plant.

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Compliance snapshot (last 3 years)

Total violations
2
Effluent violations
0

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

EPA enforcement history

Federal civil enforcement cases, compliance inspections and informal actions recorded for Hoosic Wastwater Treament Plant in EPA's ICIS system.

Formal actions
1
0 since FY2020
Penalties assessed
$100,000
all cases
Compliance actions
$4.8M
required by EPA orders
EPA inspections
0
none on record

Latest case · Oct 2003

HOOSAC WATER QUALITY DISTRICT

Judicial case · CWA, NPDES Discharge without a Permit · Final Order With Penalty · Penalty $100,000 · Compliance actions $4.8M

Source: EPA ECHO, civil enforcement case 01-2000-0226.

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Every action against Hoosic Wastwater Treament Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.

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Key contacts

1 verified contact for Hoosic Wastwater Treament Plant, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Hoosic Wastwater Treament Plant, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Massachusetts

Monroe W W T F

Monroe Bridge · 14 mi away

0.0095 MGD

9.85 MGD

0.15 MGD

West Stockbridge W W T F

West Stockbridge · 29 mi away

0.02 MGD

0.58 MGD

Stockbridge W W T P

Stockbridge · 31 mi away

0.16 MGD

0.08 MGD

Hoosic Wastwater Treament Plant: 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 May 19, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms


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