South Dakota Game Fish and Parks has released a report regarding levels of mercury and consumption safety regarding fish taken from South Dakota Lakes. According to the report, area lakes which have received a consumption advisory includes Bitter Lake, Dry Lake #2, Elm Lake, Hazelden Lake, Kiez Lake, Minnewasta Lake, Lardy Lake, Long Lake, Lynn Lake, Middle Lynn Lake, North Buffalo Lake, Opitz Lake, and South Buffalo Lake. For the most part, Walleyes are most compromised by mercury in these lakes.
| County | Lake | Fish Species |
| Brookings/Kingsbury | Twin Lakes | Walleye – 18″ & larger Northern Pike – 19″ & larger |
| Brown | Elm Lake | Walleye – 25″ & larger |
| Butte | Newell Lake | Walleye – 18″ & larger Northern Pike – over 18″ |
| Clark | Reid LakeSwan Lake Dry #2 | Walleye – over 23″Walleye – over 21″ Walleye – 22″ & larger |
| Codington | Long Lake | Walleye – over 17″ |
| Corson | Pudwell Dam | Walleye -18″ & largerBlack Crappie – over 12″ |
| Day | Bitter Lake Hazeldon LakeLake MinnewastaLardy LakeLynn LakeMiddle Lynn Lake Opitz | Walleye – all sizes Northern Pike – 30″ & larger Walleye -21″ & largerWalleye -18″ & largerWalleye -25″ & largerWalleye -18″ & largerWalleye -18″ & largerNorthern Pike – over 26″ |
| Dewey | Lake Isabel Little Moreau | Northern Pike – 25″ & larger Largemouth Bass – 17″ & largerNorthern Pike – 26″ & larger |
| Kingsbury/Brookings | Twin Lakes | Walleye – 18″ & larger Northern Pike – 19″ & larger |
| Marshall | North & South Buffalo Lake | Walleye – 21″ & larger |
| McCook/Minnehaha | North Island Lake | Walleye – 18″ & largerSmallmouth Bass – 18″ & larger |
| McPherson | Kiesz Lake | Walleye – over 16″ |
| Minnehaha | Twin Lakes Scott Lake | Walleye – all sizes Walleye – 25″ & larger |
| Pennington | New Wall Lake | Black and White Crappies – over 13″ Largemouth bass – over 16″ |
| Perkins | Coal Springs Reservoir | Northern Pike – over 25″ |
| Potter | Lake Hurley | Largemouth Bass – 18″ & larger |
| Tripp | Lake Roosevelt | Largemouth Bass -18″ & larger Northern Pike – over 24″ |
