Where is Millsite Lake?

Millsite Lake is a lake in Jefferson County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.

How deep is Millsite Lake?

No published bathymetric survey covers Millsite Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 52 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.

Are there boat ramps on Millsite Lake?

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

Can I fish at Millsite Lake?

Millsite 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 New York's fish and wildlife agency, so check its current regulations before you go.

Millsite Lake

Jefferson County, New YorkView map Directions

NY DEC publishes the water-quality measurements for Millsite Lake. Here is what has been measured.

Clarity

27.9 ft

Clearer than most

Secchi · sampled 2020

Max depth

~52 ft est.

GLOBathy model

52 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Millsite Lake in Jefferson County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 27.9 ft visibility.

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Millsite Lake is a lake in Jefferson County, New York with an estimated average depth of about 52 feet. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-09-19. Methodology: how these readings are compared.

Millsite Lake has one public boat landing. For a place on the water, look through cabin and lake-house rentals near Millsite Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.

What Millsite Lake is good for

From access and monitoring records, not editorial picks.

Clear water27.9 ft of visibility
Boat launch1 documented ramp

Swimming conditions

No reading

Limited data

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

Whether Millsite Lake is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Millsite Lake

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

Crystal clear, you can see 27.9 ft down. TSI 29.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	27.9ft	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus		No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)		No reading The green pigment in algae — a direct measure of how much algae is in the water.
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.	29	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

Ask about Millsite Lake

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

Lake Details

Max depth

~52 ft est.

Public access

Yes

Listed by NY DEC

Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. New York has not published bathymetry for Millsite Lake.

Lake Size & Watershed

Watershed (drainage) area

2 sq mi

HydroLAKES / HydroSHEDS

Surface area

420 acres

HydroLAKES / HydroSHEDS

Shoreline

6.3 mi

HydroLAKES / HydroSHEDS

Elevation

302 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.

Recreation & Access

Boat Landings

Yes

Public Access

Millsite LakePublic

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

Stays via Stay22

Stays near Millsite Lake

Compare lakeside cabins, hotels, and vacation rentals near Millsite Lake in Jefferson County, New York — 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 Millsite Lake

Prices for Oct 30–Nov 1, 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.

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Fishing Millsite Lake

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

Regulated Pollution Sources Nearby

1 EPA-permitted facility operate within about 5 miles of Millsite Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.

Redwood Sd
Theresa · 1.3 mi away · NPDES NY0215911
Recent violation

Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.

Nearby Lakes in Jefferson County

Sixberry Lake—View →Butterfield Lake11.3 ft clear1.8 miView →Crystal Lake—View →Mud Lake—View →Red Lake—View →Moon Lake—View →

Frequently asked questions about Millsite Lake

Where is Millsite Lake?: Millsite Lake is a lake in Jefferson County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of Millsite Lake?: Millsite Lake in Jefferson County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 27.9 ft visibility.
Is Millsite Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Millsite Lake?: No published bathymetric survey covers Millsite Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 52 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Millsite Lake?: Millsite Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Millsite Lake. Public access is listed as yes.
Can I fish at Millsite Lake?: Millsite 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 New York's fish and wildlife agency, so check its current regulations before you go.

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