Quality of surface-water supplies in the Triangle area of North Carolina, water year 2008

Abstract

• Concentrations of nitrogen and phosphorus were within ranges observed during previous years; however, Falls Lake at U.S. Interstate 85 had elevated levels of nitrate plus nitrite and total phosphorus relative to other sites. • Five lakes had chlorophyll a concentrations in excess of 40 micrograms per liter at least once during 2008, including Little River Reservoir, Falls Lake, Lake Benson, University Lake, and Jordan Lake.

Triangle Area Water Supply Monitoring Project, North Carolina—Overview of hydrologic and water-quality monitoring activities and data quality assurance

“…This trends report identified substantial changes in population, land cover, streamflow, and selected water-quality features in the study area over the 25-year period. Multiple OFRs were published to summarize monitoring activities and data in the TAWSMP study area for water years 2012-13, 2014-15, and 2016-17 in Pfeifle and others (2016b.…”

“…Starting in July 2011, seven sites were removed from the monitoring network. Multiple OFRs were published to summarize monitoring activities and data in the TAWSMP study area for water years2008 , and 2010 -11 (Giorgino and others, 2012 others 2014, 2016a, respectively).…”