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TRIANGLE AREA WATER SUPPLY MONITORING PROJECT
<br />INTERLOCAL AGREEMENT
<br />ATTACHMENT A
<br />SUMMARY OF TRIANGLE AREA WATER SUPPLY MONITORING PROJECT
<br />PARTNERSHIP, AUGUST 1988 -JUNE 2007
<br />Because of reliance on surface water for water supply and the potential impact of growth on the
<br />quality of the region's water supply sources, local governments in the region recognize that
<br />water quality monitoring is crucial to the protection of the Triangle Area's surface water
<br />resources. In 1988, a number of local governments in the six-county region, with assistance from
<br />the Triangle J Council of Governments, formed the Triangle Area Water Supply Monitoring
<br />Project to systematically evaluate the quality of several water supply sources in the region. With
<br />assistance from the US Geological Survey (USGS), the Project has collected and analyzed water
<br />quality samples from reservoirs and streams and collected continuous discharge record from
<br />streams in the study area for more than 15 years. These data, along with data collected by the
<br />North Carolina Division of Water Quality (DWQ) and with data collected as part of a program of
<br />the USGS, the US Army Corps of Engineers, and the City of Durham, form along-term
<br />comprehensive data base on the quality of many of the area's water supply reservoirs and rivers,
<br />and selected tnbutaries to those water supplies.
<br />In the last 15 years, concerns about water quality of the area's water supplies and the impact of
<br />development on reservoir eutrophication and contaminant concentrations have remained
<br />prominent, although specific concerns have changed. Monitoring initially focused on
<br />determining the occurrence of synthetic organic compounds in the water column and bed
<br />sediments; Later monitoring and interpretive efforts focused on nutrient and sediment loads and
<br />trends. Issues such as the occurrence ofdisinfection by-products, microbial pathogens, and
<br />pharmaceutical and personal care products have also been addressed.
<br />Phase I of the Project began with the execution of an interlocal agreement on August 18, 1988.
<br />At that time, the local government partners consisted. of Chatham County, Orange County, the
<br />Town of Apex, the Town of Carrboro, the Town of Cary, the Town of Chapel Hill, the City of
<br />Durham, the Town of Hillsborough, the Town of Pittsboro, the City of Raleigh, the City of
<br />Sanford, and the Town of Smithfield. Phase I concluded in June 30, 1991.
<br />Phase II of the Project began on July 1, 1991 with the execution of an amendment to the original
<br />interlocal agreement. At that time, the local government partners consisted of Chatham County,
<br />Orange County, the Town of Apex, the Town of Carrboro, the Town of Cary, the Town of
<br />Chapel Hill, the City of Durham, the Town of Hillsborough, the City of Raleigh, the City of
<br />Sanford, and the Town of Smithfield. The Town of Pittsboro had left the Project after Phase I.
<br />Phase II concluded in June 30, 1995.
<br />Phase III of the Project began on July 1, 1995 with the execution of an amendment to the original
<br />interlocal agreement. At that time, the local government partners consisted of Chatham County,
<br />Orange County, the Town of Apex, the Town of Carrboro, the Town of Cary, the Town of
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