Client project details

Grondin (Birch Hill Development – Conway, NH)

The Project

Evaluation of the Largest Giardiasis Outbreak in a U.S. Public Water System in the Past Ten Years

In August and September 2007, the contamination of potable drinking water supplies at the Birch Hill Development in Conway, New Hampshire resulted in the largest giardiasis outbreak within the United States in the last 10 years.  This outbreak caused serious illness in 31 people; at least two remain seriously ill to this day.

EGGI was retained to investigate the likely source of contamination and to determine whether the water system owner did the following:  1) took sufficient steps to understand the water system and water sources that they were operating, 2) followed regulatory permitting requirements relative to utilizing water sources that provided drinking water to the public and, 3) conducted sufficient efforts to manage and diminish the risks for catastrophic failure of the water supply.

Status/Results:

EGGI’s review of available information and insights gained during site visits ultimately led to the preparation of a legal report that served to identify several factors that likely contributed to the contamination of the potable water supplied to the Birch Hill Development.  This study reinforced the need for all Public Water Systems to provide sufficient sanitary protection for their water sources, conduct rigorous hydrogeologic testing of all water supply wells in order to understand the hydrologic setting of their water sources, and confirm that the construction of groundwater supply wells meets all State and Federal water supply regulations.

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EGGI’s review of available information and insights gained during site visits ultimately led to the preparation of a legal report that served to identify several factors that likely contributed to the contamination of the potable water supplied to the Birch Hill Development.

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P.O. Box 1578
56 Main Street
Meredith, NH 03253
T: (603) 279-4425
F: (603) 279-8717
eggi@eggi.com

“Data and research provide the underpinning for sound local water management decision-making that advances the well-being of the nation’s citizens, economy, and environment.”

- National Ground Water Association