Mercury levels in lakes are routinely monitored across the United States, and it is common for state environmental agencies to issue fish consumption advisories. The Oklahoma Department of Environmental Quality (DEQ) has updated its list of lakes with consumption advisories for mercury. Four Oklahoma lakes have been added to the list since recommendations were last made in 2023. The lakes with new advisories are:
- Bell Cow Lake
- Fuqua Lake
- Overholser Lake
- Lake Ponca
Each of the above-listed lakes has recommendations specific to that lake. For detailed information on the advisories and testing, go to: https://tinyurl.com/567sjacf
The consumption advisories are the result of testing done by DEQ with the cooperation of the Oklahoma Department of Wildlife Conservation (ODWC). Many of Oklahoma’s lakes have been tested to determine mercury levels in fish. Currently, 76 lakes in the state have specific fish consumption advisories for mercury.
DEQ recognizes the importance of fishing in Oklahoma and encourages residents to enjoy the sport, while following the suggested guidelines for fish consumption. Fish provide many benefits that are essential for a healthy diet. Some fish do pose a higher risk for mercury contamination; therefore, DEQ encourages people to be mindful of the type and amount of fish consumed.
The levels of mercury in fish do not affect the lake’s safety as a source of drinking water or for lake recreation, such as swimming and boating.
For detailed information on specific lakes with consumption advisories for mercury, visit: https://tinyurl.com/567sjacf, call (866) 412-3057, or email [email protected].


















