Mermet State Lake
Info / Massac County
Family Friendly
No
Handicap Access
No
Boat Fishing
Yes - 10 hp limit and no wake for boats with larger motors
Boat Ramps
Yes
Boat Rentals
Yes
Camping
No
Picnicking
Yes - More Info
Skiing
No
Swimming
No
Trout Stocking
No
Zebra Mussels
Location 452 acres
Fishing Outlook
Redear Sunfish
Excellent
: A decent number of Redear Sunfish were sampled in 2021 (27/hr). The lake sustains a phenomenal Redear fishery but these fish can be difficult to sample at certain times of the year. Quality and condition of these fish were phenomenal, and 40% of the fish sampled were at least 10 inches long.
Bluegill
Very Good
Bluegill were substantially more abundant in 2022 than in the previous year at 473 per hour of electrofishing, 34% were larger than 6 inches (within desirable management goals), with 13 percent of the sampled population exceeding 7 inches. Bluegill body condition was still excellent.
Crappie spp.
Very Good
White crappie were sampled at a rate much better than previous years (47/hr) and quality and condition as evident by percentage of fish over 8 inches (PSD=60%), percentage of fish over 10 inches (RSD-10”=13%) and high body condition (relative weight=94) were much better. Black crappie prospects are similar, with fish sampled at a much higher rate (53/hr) with much better quality and condition indices.
Channel Catfish
Average
Channel Catfish are generally not a large component of the annual Mermet Lake electrofishing sample, and 2022 followed this trend (11/hr). Annual Channel Catfish stockings help support a fishery which is very popular with the angling public.
Largemouth Bass
Very Good
Largemouth Bass were collected at a rate of 85 per hour in fall 2022, nearly double last year. 70% 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 52% of the sample, while 34% exceeded the newly implemented length limit of 16 inches (April 1, 2016). Bass condition remained excellent.
| 2025 | Channel Catfish | Advanced Fingerling (4 - 7") | 10017 |
| 2024 | Channel Catfish | Advanced Fingerling (4 - 7") | 4000 |
| 2024 | Channel Catfish | NonVulnerable (8 - 10") | 6115 |
| 2024 | Largemouth Bass | Fingerling (1 - 3") | 10000 |
| 2023 | Channel Catfish | Advanced Fingerling (4 - 7") | 10000 |
Contact
618-524-5577
Description
Mermet Lake 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 more than 50 years. Curlyleaf pondweed, a non-native aquatic plant, invaded Mermet Lake in 1999, and has caused occasional summer fish kills since then. 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.Site Regulations
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 7 days prior to the opening of the South Zone Duck Season and reopens after the season ends.
Site-Specific Fishing Regulations:
- Recreational Use Restriction: Waterfowl Refuge or Hunting Area (see above)
- All Fish: 2 pole and line fishing only and each pole must not have more than 2 hooks or lures attached while fishing; bow fishing is allowed
- Channel Catfish: 6 Fish Daily Harvest Limit
- Large or Smallmouth Bass: 16 inch Minimum Length Limit; 3 Fish Daily Harvest Limit
- White, Black or Hybrid Crappie: 25 Fish Daily Harvest Limit