Where is Herrin Lake?

Herrin Lake is a lake in Williamson County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.

How deep is Herrin Lake?

Herrin Lake has a maximum depth of 26 feet and an average depth of 12 feet. The lake covers 52 acres.

Are there boat ramps on Herrin Lake?

Herrin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Herrin Lake #2. Public access is listed as yes.

Can I fish at Herrin Lake?

Herrin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Illinois's fish and wildlife agency, so check its current regulations before you go.

Herrin Lake

Williamson County, Illinois52 acresView map Directions

No nutrient or algae sampling on record from Illinois EPA for this lake.

Max depth

26 ft

Bathymetric survey

Area

52 acres

Surface area

Shoreline

3.1 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
26 ft max depth
Public access

See the measurements Directions Where to stay

Herrin Lake in Williamson County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 26 ft. Surface area: 52 acres.

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Herrin Lake is a 52-acre lake in Williamson County, Illinois with a maximum depth of 26 feet (12-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, Illinois EPA. Methodology: how these readings are compared.

What Herrin Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Herrin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.

Whether Herrin Lake is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Herrin Lake

These are the measurements Illinois EPA publishes for Herrin Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Herrin Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

26 ft

Average depth

12 ft

Surface area

52 acres

Shoreline

3.1 mi

Public access

Yes

Listed by Illinois EPA

Recreation & Access

Boat Landings

Yes

Public Access

Herrin Lake #2Public

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

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Stays near Herrin Lake

Compare lakeside cabins, hotels, and vacation rentals near Herrin Lake in Williamson County, Illinois — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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Fishing Herrin Lake

→ Herrin Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Herrin Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Other.

Source: EPA ATTAINS assessment unit IL_RNZC · Official waterbody report

Nearby Lakes in Williamson County

Teal Lake2.9 miView →Marion Country Club Lake3.7 miView →Marion Reservoir4.1 miView →Devils Kitchen Lake4 miView →Lake of Egypt3.2 ft clear · Eutrophic6 miView →Crab Orchard Lake7.7 miView →

Frequently asked questions about Herrin Lake

Where is Herrin Lake?: Herrin Lake is a lake in Williamson County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Herrin Lake?: Herrin Lake in Williamson County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 26 ft. Surface area: 52 acres.
Is Herrin Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Herrin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Herrin Lake?: Herrin Lake has a maximum depth of 26 feet and an average depth of 12 feet. The lake covers 52 acres.
Are there boat ramps on Herrin Lake?: Herrin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Herrin Lake #2. Public access is listed as yes.
Can I fish at Herrin Lake?: Herrin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Illinois's fish and wildlife agency, so check its current regulations before you go.