Where is Frentress Lake?

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

How deep is Frentress Lake?

Frentress Lake has a maximum depth of 10 feet. The lake covers 132 acres.

Are there boat ramps on Frentress Lake?

Frentress Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Frentress Lake.

Can I fish at Frentress Lake?

Frentress 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.

Frentress Lake

Jo Daviess County, Illinois132 acresView map Directions

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

Max depth

10 ft

Bathymetric survey

Area

132 acres

Surface area

Shoreline

5.4 mi

Measured length

Impaired · Algal growth
10 ft max depth

See the measurements Directions Where to stay

Frentress Lake in Jo Daviess County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 10 ft. Surface area: 132 acres.

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Frentress Lake is a 132-acre lake in Jo Daviess County, Illinois with a maximum depth of 10 feet. 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 Frentress 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. Frentress Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.

Whether Frentress 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 Frentress Lake

These are the measurements Illinois EPA publishes for Frentress 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 Frentress Lake

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

Lake Details

Max depth

10 ft

Surface area

132 acres

Shoreline

5.4 mi

Recreation & Access

Boat Landings

Frentress LakeSemi-private

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 Frentress Lake

Compare lakeside cabins, hotels, and vacation rentals near Frentress Lake in Jo Daviess 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.

Top-rated places to stay near Frentress Lake

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Fishing Frentress Lake

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

EPA Impairment Status

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

Causes of impairment

Algal growthNutrients (phosphorus, nitrogen)Turbidity

Designated uses not supporting: Aquatic life, Other.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit IL_RMA · Official waterbody report

Nearby Lakes in Jo Daviess County

Tippy Lake4.5 miView →Hires Lake4.7 miView →Galena Lake5.2 ft clear14.6 miView →Apple Canyon Lake22.9 miView →

Frequently asked questions about Frentress Lake

Where is Frentress Lake?: Frentress Lake is a lake in Jo Daviess County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Frentress Lake?: Frentress Lake in Jo Daviess County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 10 ft. Surface area: 132 acres.
Is Frentress Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Frentress Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
How deep is Frentress Lake?: Frentress Lake has a maximum depth of 10 feet. The lake covers 132 acres.
Are there boat ramps on Frentress Lake?: Frentress Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Frentress Lake.
Can I fish at Frentress Lake?: Frentress 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.