Mills River at Mills River Park

Source Information

The French Broad Riverkeeper is a program of MountainTrue and a member of the Waterkeeper Alliance. Every week from the end of May to early September, French Broad Riverkeeper staff, interns, and volunteers monitor water quality at sites across the French Broad River Watershed. Weekly results are posted on Fridays so you know where it's safe to swim, fish, and paddle on your weekend adventures. Results will be communicated through the Swim Guide mobile app and website, as well as the French Broad Riverkeeper Facebook and Instagram pages. There is currently no water quality standard for E. coli in North Carolina; however, in 2022 NC Department of Health and Human Services provided recommended primary and secondary recreational values for all recreational waters. 126 MPN/100 mL is being used to communicate whether an increased exposure risk may be present for primary recreational activities (swimming/snorkeling) and 886 MPN/100 mL for secondary recreational activities (kayaking, tubing, fishing) in Class B waters. A site will be marked red when the result exceeds the primary recreational value of 126 MPN/100 mL and green when the most recent sample value is 126 MPN/100 mL or below. All recreators should be aware results are preliminary and, while posted as soon as available, represent data that is a day old and should only be used as guidance when assessing exposure risk as bacteria levels can change at any time. The French Broad Riverkeeper utilizes the EPA-approved IDEXX method for collecting and analyzing water samples. Test results are expressed as Most Probable Number (MPN) of E. coli cfu (colony forming units) per 100 ml.