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CURRENTLY 55°
FAIR
WINDS NORTHEAST @ 4MPH
HUMIDITY 72%
VISIBILITY 10MI
DEW POINT 45°

Mermet Lake

Massac County, IL
Massac County, IL
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Mermet Lake is a shallow, 452-acre, IDNR-owned impoundment located in Massac County approximately 10 miles north of Metropolis.
Mermet was originally built as a water supply for flooding adjacent wetland compartments for waterfowl hunting, but sport fish flourished when stocked, and the lake has been managed for fishing for approximately 50 years. Curlyleaf pondweed, an exotic aquatic plant, invaded Mermet in 1999, and has caused occasional summer fish kills since then, but annual herbicide treatments have generally been successful at controlling the impacts of this plant in recent years, allowing the sport fish population to slowly recover.
The outboard motor limit is 10 hp, but boats with larger outboards are allowed to operate at no-wake speed. Mermet Lake is closed to fishing during the duck season.

Site Regulations:
Largemouth bass: 16” minimum length limit, 3 per day creel
Black and white crappie: 25 per day creel
Channel catfish: 6 per day creel
450 acres
LAKE SIZE
3.5 miles
SHORELINE
BOATING RESTRICTIONS
Unrestricted
AMENITIES
Boat Landing
Camping
Swimming
Boat Rentals
Picnicking
Skiing
FISH TO CATCH
Black Crappie
Bluegill
Channel Catfish
Largemouth Bass
Muskie
Redear Sunfish
Sauger
White Crappie
Yellow Bullhead
Carp
Triploid Grass Carp
NOTE: This list may not be all inclusive of all speices present in Mermet Lake.
TOPO MAP FOR MEMBERS
FISHING OUTLOOK
BLUEGILL
Excellent EXCELLENT
Bluegill were nearly 4 times more abundant in 2019 than in the previous year at 237 per hour of electrofishing, 11% were larger than 6 inches (under the management goal), with 4 percent of the sampled population exceeding 7 inches. Bluegill body condition was still excellent.
CHANNEL CATFISH
Average AVERAGE
Channel catfish are generally not a large component of the annual Mermet Lake electrofishing sample, and 2019 followed this trend. No fish were sampled. Annual channel catfish stockings help support a fishery which is very popular with the angling public. Site regulation: 6 per day creel.
CRAPPIE
Very Good VERY GOOD
Small numbers of white and black crappie were sampled in 2019. However, as a note, crappie weighing more than 2 pounds have been fairly regularly reported by Mermet Lake anglers, and sampling techniques will be implemented in the future to more adequately sample them. Site regulation: 25 per day creel.
LARGEMOUTH BASS
Very Good VERY GOOD
Largemouth bass were collected at a rate of 87 per hour in fall 2019, up substantially from last year. 62% of these fish were larger than 12 inches, which easily met the management plan goal. Bass larger than the old 14 inch minimum size limit made up 49% of the sample, while 22% exceeded the newly implemented length limit of 16 inches (April 1, 2016). Bass condition remained excellent. Site regulation: 16” minimum length limit, 3 per day creel.
REDEAR SUNFISH
Excellent EXCELLENT
Redear abundance was triple the previous year in the 2019 fall sample, with 13 fish per hour collected. Population and condition parameters were well within goals. It is assumed that these fish are not scarce, but their location at the time of sampling does not overlap with sample locations. Future surveys will be implemented to better survey bluegill and redear populations.
PLACES TO SAY
STAY 22: Mermet Lake
CONTACT / CONTROLLING AUTHORITY
Mermet Site Office
618-524-5577
IDNR Fisheries Biologist, Luke Nelson
618-985-1112
NOTICE: Lake-Link Inc assumes no responsibility or liability for any errors or omissions of the information for Mermet Lake. Although we strive to provide the most accurate information as we can the information contained in this page is provided on an "as is" basis with no guarantees of completeness, accuracy, usefulness or timeliness.
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