Department of Public Works, 680 Peverly Hill Rd, Portsmouth, NH 03801 Phone: (603) 427-1530, Fax: (603) 427-1539 | Contact |

Pease Tradeport Water Information

Pease International Tradeport Water System Update

The City of Portsmouth's Water Division has been actively working with the United States Air Force (Air Force), theUnited States Environmental Protection Agency (EPA), and the New Hampshire Department of Environmental Services (DES) in response to the detection of elevated levels of the unregulated contaminant perfluorooctane sulfonic acid (PFOS) from the Haven Well, one of three wells that serves the Pease International Tradeport and the New Hampshire Air National Guard base at Pease. PFOS is one of a class of chemicals known as PFCs or perfluorochemicals. Because the level of PFOS exceeded the "provisional health advisory" set by the EPA, the well was shut down by the City of Portsmouth on May 12, 2014 and since that time it has been physically disconnected from the system. A number of actions have been taken by the project team. The following documents provide additional Information:

  • The Haven Well will remain off-line indefinitely. 
  • The City is not in violation of any state or federal drinking water standard.  This is an unregulated compound of concern and regulators and the City are taking conservative precautionary measures.
  • The Pease and Portsmouth water systems consist of two separate zones that are isolated from each other, but interconnections exist between the two systems for temporary back up and in case of emergencies.  The water that feeds the Portsmouth zone (which also serves portions of Greenland, Madbury, New Castle, Newington, Madbury and Rye) was tested last Friday for this unregulated compound and none were detected. 
  • There is currently sufficient water to supply the Pease system customers. Historically, the Haven Well provided 46% of the water to the Pease system. To make up for that source, the water operations staff is providing supplemental water to Pease through the Portsmouth system.
  • The City is working with regulators to continue investigation of this issue and options with respect to treatment and/or replacement of this water source.

We will continue to provide updated information as we have it.

The City takes water quality and safety seriously and is working closely with the regulators to learn more about this unregulated compound.  In the meantime the Haven Well will remain off line.  Questions related to this issue are to be directed to Brian Goetz at (603) 766-1420.




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