Updated water sampling shows compliance with all standards
Friday, September 22, 2017
CONCORD – The City of Concord is pleased to announce that as of August 2017, drinking water supplied to our customers has returned to compliance with all federal and state regulations.
In June of this year, customers were notified of the exceedance of haloacetic acids, in violation of a drinking water standard. Haloacetic acids (HAAs) are a type of by-product formed when the chlorine used to disinfect drinking water reacts with naturally occurring organic matter (NOM) in water. Monitoring results for water samples collected during the quarterly sampling period ending June 30, 2017 showed that the contaminant concentration for total haloacetic acids from one of the eight sampling locations in Concord's water system exceeded the standard by .0024 micrograms per liter. Although water remained safe for drinking, cooking, bathing, swimming, and other activities, the City prioritized keeping customers aware of what happened, actions they could consider, and what the City would do to correct the situation.
August's sampling results show that Concord's water has returned to compliance with haloacetic acid levels and all other regulations at all sampling locations. To achieve compliance, Water Resources professionals immediately started new efforts to correct the HAA issue, including adjusting the pH of the treated water to be less favorable for HAA formation, and using carbon in raw water to adsorb as much of the organics as possible prior to chlorination.
Concord's water is mixed with finished water from two utilities outside of Cabarrus County in order to provide capacity that meets customer demand. Concord staff has enhanced their partnership with the City of Albemarle to better communicate treatment strategies that will reduce levels of haloacetic acids in the finished water they provide to Concord. The City of Concord is working to implement additional new technologies in the future to help ensure all customers are provided the highest quality water possible.
The City of Concord values its customers and takes its commitment to supplying good quality drinking water seriously. All customers are encouraged to visit concordnc.gov/waterqualityreport to become familiar with Concord's water sources, composition, and testing data. More information about the Water Resources Department is available at concordnc.gov/Water, customers can call 704-920-5342 to discuss the specifics of the water treatment process.
Peter L. Franzese
Public Affairs and Projects Manager