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Manchester Water Works Chlorine Conversion

Published: 09/01/2025 11:35 AM

 

 

Manchester Water Works (MWW) has scheduled a conversion of the disinfectant chloramine used in our water treatment process to chlorine to begin September 2nd and continue through the week of  October 14th (six weeks). During this time, you may notice a slight change in the taste and smell of your drinking water that has no harmful effects.

 

Periodically MWW switches the disinfectant from chloramine to chlorine for the maintenance of our water distribution system. Early on during the conversion, MWW will also conduct selective hydrant flushing to enhance water quality.  This procedure is a common practice for many U.S. public water systems that use chloramine as a disinfectant and the practice is approved by the Environmental Protection Agency (EPA) which regulates the safe use of chlorine and chloramine. 

 

MWW routinely collects and tests water samples to monitor for chloramine and chlorine levels throughout the distribution system and will continue to do so during this period. Should you notice a change in the taste or smell of chlorine, MWW recommends:

 

  • Run the cold water tap for two minutes.  Run it for five to 10 minutes when water is not used for several hours.
  • Refrigerate cold tap water in an open pitcher. Within a few hours, the chlorine taste and odor should dissipate.
  • There are available filters that may reduce the chlorine taste and smell.  MWW recommends using those that are either installed onto your faucet tap or using a pitcher-style filter.  The filter should meet NSF certified safety standards and you should replace the filter as recommended by the manufacturer.

 

Individuals and business owners who take special precautions to remove chloramine from tap water, such as dialysis centers, medical facilities and aquatic pet owners, should continue to take the same precautions during the temporary switch to chlorine.  Most methods for removing chloramine from tap water are effective in removing chlorine.   Individuals with special health concerns should consult a health care provider on the use of tap water.  

 

Should you have any concerns, please contact the MWW Laboratory directly at (603) 792-2855 (Monday-Friday, 8:00 a.m. - 4:00 p.m.)

 

 

 

Feasibility Study for Raising the Level of Lake Massabesic by One Foot Ongoing

Published: 06/13/2025 2:22 PM

Feasibility Study for Raising the Level of Lake Massabesic by One Foot Ongoing

June 10, 2025

 

The State of New Hampshire Department of Environmental Service (NHDES) is working closely with the Manchester Water Works and the Turner Group to evaluate the feasibility of raising the dam spillway of Lake Massabesic by one foot.

 

The purpose of this project is to provide the ability for the lake to store more drinking water for potential future use by New Hampshire communities impacted by drinking water contamination.

 

Impacts to private property owners and infrastructure are currently being assessed to determine what modifications may be necessary to address potential flooding impacts.

 

Questions about this project may be directed to watershed@manchesternh.gov.

Environmental Review - Noyes Rd and Josephine Dr, Londonderry

Published: 02/01/2024 9:38 AM

 

ENVIRONMENTAL REVIEW

 

FUNDING RECIPIENT: Manchester Water Works

PROJECT TITLE: Noyes Road Water Main

PROJECT ADDRESS: Noyes Rd and Josephine Dr, Londonderry, NH

WATER SYSTEM PWS#/PROJECT #: 1471010

 

 

 

 

Manchester Water Works (MWW) has applied for funds through the State of New Hampshire Drinking Water and Groundwater Trust Fund (DWGTF) to finance a water infrastructure improvements project in Londonderry, NH.

 

 

 

This project includes installation of 1,700 linear feet of 30-inch water main to connect the existing Londonderry water storage tanks (14 Josephine Dr) to the existing MWW water system. The water main route will include traversing cross country from the existing water storage tanks, through Lot 15-35C (56A/B Noyes Rd), then extending to the existing 16-inch water main in the public right of way on Noyes Rd and connecting to the existing distribution system at the intersection with Rockingham Rd (NH Route 28). Construction will additionally include relocation of the existing septic tank and leach field of 56A/B Noyes Rd.
 

All required permits and approvals will be obtained prior to construction.


Whereas this project constitutes only a minor project, and no significant environmental impacts are anticipated, a Finding of No Significant Impact (FONSI) is proposed.

 

PUBLIC REVIEW

This public notice is published in accordance with Env-Dw 1300 and a 30-day comment period will be held.  Comments will be accepted through Sunday, March 3, 2024, when the public notice will end.

 

 

 

 

The full document is available at www.des.nh.gov under “Resource Center, Public Notices”, and search for “Manchester”.  Comments may be addressed to the following locations: Manchester Water Works, Attn: Jeffrey Provost, 100 International Dr, Portsmouth NH, 03801 provostj@wseinc.com; or NHDES Drinking Water and Groundwater Trust Fund Attn: Jennifer Brady, Environmental Review Coordinator, PO Box 95, 29 Hazen Dr, Concord NH 03302-0095, or by email at: envreview@des.nh.gov.

 

 

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