Tennessee Wildlife Resources Agency

TWRA's Region 4 - East Tennessee

Reservoir Fisheries Management Program

Water Quality Profiles (July-Sept)


The TWRA takes dissolved oxygen and temperature profiles on several East Tennessee reservoirs during July, August and September of each year. The purpose of this sampling is to determine if conditions are favorable for various game fish species and to locate any potential problems during the summer months when dissolved oxygen levels can become poor. Every attempt is made to keep this data up to date so anglers may have a better idea of where fish may be located. It may take a day or two after sampling to get the data entered and ready for posting.

Summer Water Quality Profiles (PDF):

Davy Crockett
Fort Loudoun
Fort Patrick Henry
John Sevier
Melton Hill


Water Quality Parameters and Related Topics:

Temperature   pdf (586 k)
Dissolved Oxygen   pdf (1,035 k)
PH   pdf (1,218 k)
Conductivity   pdf (655 k) Why PH decreases and conductivity increases
Chlorophyll   pdf (398 k)
Turbidity   pdf (1,151 k)
Lake Ecology   pdf (232 k)
Factors that Influence Water Color   pdf (1,852 k)


The Tennessee Departement of Conservation (TDEC) is responsible for managing, protecting and enhancing the quality of the state's water resources through voluntary, regulatory and educational programs. Please contact TEDC, if you observe any actions that you feel might be detrimental to the State's water resoirces.



Summer Stratification



TWRA water quality profile example

A typical DO/Temp graph generated from TWRA's data



Food Web

Food Web - courtesy of Aqua Link, Inc.


Norris Melton Hill Fort Loudoun Tellico Douglas Cherokee Fort Patrick Henry Watauga Boone South Holston John Sevier Davy Crockett Wilbur Chilhowee Calderwood