Apex Lake is a lake in Washington County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.

Apex Lake

Washington County, Missouri48 acresView map Directions

No nutrient or algae sampling on record from Missouri DNR for this lake.

Area

48 acres

Surface area

See the measurements Directions Where to stay

Apex Lake in Washington County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Surface area: 48 acres.

Loading map…

Apex Lake is a 48-acre lake in Washington County, Missouri.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Apex Lake is safe to swim in today is a call for the Missouri Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Compare swimming lakes near St. Louis →

Get alerts for Apex Lake →

Water quality measurements for Apex Lake

These are the measurements Missouri DNR publishes for Apex 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 Apex Lake

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

Lake Details

Surface area

48 acres

No bathymetric survey has been published for Apex Lake, so its depth is not documented here.

Stays via Stay22

Stays near Apex Lake

Compare lakeside cabins, hotels, and vacation rentals near Apex Lake in Washington County, Missouri — 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 Apex 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 Missouri’s top lakes →

Follow Apex Lake’s readings

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

Or email

Fishing Apex Lake

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

Nearby Lakes in Washington County

Lake Shayne-Terre du Lac Lakes11.1 ft clear · Oligotrophic4.2 miView →Hornsey Lake7.2 miView →Hornsey Brothers Lake—View →Sunnen Lake1 ft clear—View →Sayersbrook Lake—View →Palmer Lake—View →

Frequently asked questions about Apex Lake

Where is Apex Lake?: Apex Lake is a lake in Washington County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Apex Lake?: Apex Lake in Washington County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Surface area: 48 acres.
Is Apex Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.