Where is Eureka Lake?

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

How deep is Eureka Lake?

Eureka Lake has a maximum depth of 23 feet and an average depth of 12 feet. The lake covers 30 acres.

Are there boat ramps on Eureka Lake?

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

Can I fish at Eureka Lake?

Eureka 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.

Eureka Lake

Woodford County, Illinois30 acresView map Directions

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

Max depth

23 ft

Bathymetric survey

Area

30 acres

Surface area

Shoreline

1.5 mi

Measured length

Impaired · Algal growth
23 ft max depth
Public access

See the measurements Directions Where to stay

Eureka Lake in Woodford County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 23 ft. Surface area: 30 acres.

Loading map…

Eureka Lake is a 30-acre lake in Woodford County, Illinois with a maximum depth of 23 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 Eureka 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. Eureka Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, cause unknown, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.

Whether Eureka 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.

Compare swimming lakes near Rockford →

Get alerts for Eureka Lake →

Water quality measurements for Eureka Lake

These are the measurements Illinois EPA publishes for Eureka 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 Eureka Lake

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

Lake Details

Max depth

23 ft

Average depth

12 ft

Surface area

30 acres

Shoreline

1.5 mi

Public access

Yes

Listed by Illinois EPA

Recreation & Access

Boat Landings

Yes

Public Access

Lake EurekaPublic

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

Stays via Stay22

Stays near Eureka Lake

Compare lakeside cabins, hotels, and vacation rentals near Eureka Lake in Woodford 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 Eureka Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a whole trip? See where to stay at Illinois’s top lakes →

Follow Eureka Lake’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Eureka Lake

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

EPA Impairment Status

Eureka 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 growthCause unknownNutrients (phosphorus, nitrogen)Turbidity

Designated uses not supporting: Other.

Source: EPA ATTAINS assessment unit IL_SDS · Official waterbody report

Nearby Lakes in Woodford County

Upper Peoria Lake15.6 miView →Spin Lake10.5 miView →Maraldo Lake11.3 miView →Evergreen Lake14.4 miView →Lake Wildwood16.3 miView →Meadow Lake19.8 miView →

Frequently asked questions about Eureka Lake

Where is Eureka Lake?: Eureka Lake is a lake in Woodford County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Eureka Lake?: Eureka Lake in Woodford County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Maximum depth: 23 ft. Surface area: 30 acres.
Is Eureka Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Eureka Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, cause unknown, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
How deep is Eureka Lake?: Eureka Lake has a maximum depth of 23 feet and an average depth of 12 feet. The lake covers 30 acres.
Are there boat ramps on Eureka Lake?: Eureka Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Eureka. Public access is listed as yes.
Can I fish at Eureka Lake?: Eureka 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.