Metro Parks says Lake Watauga toxin levels are low and not a health threat
Advisory signs remain at Centennial Park's lake while monitoring continues, according to an Oct. 9 Parks release.
NASHVILLE - Follow-up water testing at Lake Watauga in Centennial Park found low toxin levels that are not considered a health threat, according to a Metro Parks news release dated Oct. 9, 2026, opened again on Oct. 10. Metro Parks said it continues to work with the Tennessee Department of Environment and Conservation to monitor a cyanobacterial bloom at the lake.
The release says water treatment is ongoing and cooler temperatures are expected to help. Advisory signs remain in place as a precaution, and additional testing will be conducted, Parks said. Visitors are encouraged to avoid contact with the water and to keep pets away from the lake while the signs are posted.
Source: Metro Parks news release, Oct. 9, 2026 (https://www.nashville.gov/departments/parks/news/update-water-sampling-at-lake-watauga-centennial-park).