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New Hampshire Department of Environmental Services

Media Center

DATE: September 24, 2018
CONTACT: Jim Martin, (603) 271-3710

Merrimack River Dye Test Tuesday, September 25
Test will occur near Saint-Gobain Facility in Merrimack

Concord, NH – At the request of the New Hampshire Department of Environmental Services (NHDES), consultants for Saint-Gobain Performance Plastics (SGPP) will be conducting – weather permitting – a dye study on Tuesday, September 25, 2018. The purpose of this study is to evaluate the interactions between surface water and storm water where the Merrimack River flows close to the Saint-Gobain facility on Daniel Webster Highway.

During the study, a red dye (Rhodamine WT) will be released from a storm water pipe on the west bank of the river for approximately one to two hours. This dye has been approved by the U.S. Environmental Protection Agency for use in similar applications. During this time portions of the Merrimack River may briefly have a red hue. Studies of this type have been conducted previously at the wastewater treatment facilities in Dover, Portsmouth, Exeter, Newmarket, Hampton, Seabrook, Newfields, and Kittery, Maine.

For more information about this study, please contact Jim Martin, NHDES Public Information Officer at (603) 271-3710.

NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

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