Merrimack WWTF, Merrimack

Overview

Merrimack WWTF serves approximately 17,725 people in Merrimack, New Hampshire. The plant operates under the US Clean Water Act, discharging treated wastewater into the local watershed.

Merrimack Wastewater Treatment Facility (WWTF) is a municipal treatment plant located in Merrimack, Hillsborough County, New Hampshire. Serving a population of about 17,725, the plant is part of the town's infrastructure for managing domestic and industrial wastewater. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting. For a community of this size, secondary treatment is typically required, with potential nutrient removal if the receiving water body is sensitive. The plant discharges treated effluent into the Merrimack River watershed, which flows south to the Atlantic Ocean via the Gulf of Maine. The river supports diverse aquatic life and is an important regional water resource.

Environmental context

The plant discharges into the Merrimack River basin, which drains into the Atlantic Ocean through the Gulf of Maine. The river provides habitat for fish species such as Atlantic salmon and supports recreational activities. Nutrient loading from wastewater can impact downstream water quality, making treatment standards critical for ecosystem health.

Frequently asked questions

Merrimack WWTF is located on Daniel Webster Highway in Merrimack, Hillsborough County, New Hampshire, United States.

The plant serves approximately 17,725 people in the town of Merrimack and surrounding areas.

The plant discharges treated effluent into the Merrimack River watershed, which flows to the Atlantic Ocean via the Gulf of Maine.

As a US facility, Merrimack WWTF operates under the Clean Water Act and is regulated through an NPDES permit issued by the state of New Hampshire.

For a population of this size, secondary treatment is standard, often including biological processes and disinfection. Nutrient removal may be required if the receiving water body is sensitive to eutrophication.