Source Water Assessment Program

The North Carolina Department of Environmental Quality (DEQ), Public Water Supply (PWS) section, Sources Water Assessment Program (SWAP) conducted assessments for all drinking water sources across North Carolina. The purpose of the assessments was to determine the susceptibility of each drinking water sources (well or surface water intake) to Potential Contaminants Sources (PCSs). The results of the assessment are available in the SWAP Assessment Reports that include maps, background information and a relative susceptibility rating of Higher, Moderate or Lower.

The relative susceptibility rating of each source for Greenville Utilities Commission was determined by combining the contaminant rating (number and location of PCSs within the assessment area) and the inherent vulnerability rating (i.e., characteristics or existing conditions of the well or watershed and its delineated assessment area.). The assessment findings are summarized in the table to the right.

The complete SWAP Assessment report for GUC may be viewed on the Web at: To obtain a printed copy of this report, please mail a written request to: Source Water Program – Report Request, 1634 Mail Service Center, Raleigh NC 27699-1634, or email request to If you have any questions about the SWAP report please contact the Source Water Assessment by phone at 919-715-2633.

A susceptibility rating of “higher” does not imply poor water quality, only the system’s potential to become contaminated by PCSs in the assessment area.

SWAP Findings

Greenville Utilities has seven water sources from which to draw: the Tar River (Water Treatment Plant) and wells located throughout GUC’s system. Susceptibility ratings are as follows:

Water Treatment Plant


Wells: EPW, IBW