WS-8622_37884_CA_HRE_20230110_SW5

January 10, 2023
TO: Ashley Dinkins
Guilford County Department of Health and Human Services for
Winston-Salem Regional Office
NC UST Section
RE: Health Risk Evaluation
Incident # 37884
Robert Jones Well Sampling Results
6812 Coltrane Mill Road
Greensboro, NC

During this sampling event, one contaminant was detected in the well water. The standards used
to determine if the water is suitable for drinking and cooking are the United States Environmental
Protection Agency’s Maximum Contaminant Levels (MCLs) or, if no MCLs exist, North Carolina
Groundwater Standards (2L).

If the contaminant concentration exceeds the applicable standard for using the water for drinking
and cooking, the contaminant concentration is further analyzed to determine if the water is suitable for
other household uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing.
The chart below compares the detected contaminant concentration with the applicable standard:

Sample ID

Contaminant

Concentration (µg/L) MCL (µg/L)

2L (µg/L)
95183 Chloroform 0.852 80*
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per
billion.
* As total trihalomethanes.
RECOMMENDATION: The detected contaminant did not exceed the applicable water standard.
Therefore, no restrictions on the use of this water are recommended at this time.
David Lilley, Environmental Toxicologist
Division of Waste Management, NCDEQ