Where is Furnace Pond?

Furnace Pond is a lake in Plymouth County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.

How deep is Furnace Pond?

No published bathymetric survey covers Furnace Pond, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 38 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.

Can I fish at Furnace Pond?

Public access to Furnace Pond is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Massachusetts's fish and wildlife agency, so check its current regulations before you go.

Furnace Pond

Plymouth County, MassachusettsView map Directions

MassDEP publishes the water-quality measurements for Furnace Pond. Here is what has been measured.

Chlorophyll-a

46.8 µg/L

More algae than most

Measured by MassDEP

Max depth

~38 ft est.

GLOBathy model

Type

Hypereutrophic

Trophic class

Hypereutrophic
Impaired · Algal growth
38 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Furnace Pond in Plymouth County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Chlorophyll-a (algae): 46.8 µg/L.

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Furnace Pond is a highly nutrient-loaded hypereutrophic lake in Plymouth County, Massachusetts with an estimated average depth of about 38 feet. Limited fish-species data available. Public access is available. Compared to the 11 other monitored lakes in Plymouth County, Furnace Pond ranks #11 for water quality.

Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2018-08-28. Methodology: how these readings are compared.

Swimming conditions

Readings only

Limited data

Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.

Nutrient and algae readings are not a swimming clearance. Furnace Pond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, oxygen depletion (low DO). Check local advisories before you swim.

Whether Furnace Pond is safe to swim in today is a call for the Massachusetts Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Furnace Pond

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

No clarity data. Chlorophyll-a 46.8 µg/L. TSI 68.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading 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)	46.8µg/L	Poor GoodFairPoor
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.	68	Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic

Very high nutrients, dense algae, poor clarity

Ask about Furnace Pond

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

Lake Details

Max depth

~38 ft est.

Public access

Yes

Listed by MassDEP

Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Massachusetts has not published bathymetry for Furnace Pond.

Lake Size & Watershed

Watershed (drainage) area

1 sq mi

HydroLAKES / HydroSHEDS

Surface area

89 acres

HydroLAKES / HydroSHEDS

Shoreline

2.3 mi

HydroLAKES / HydroSHEDS

Elevation

69 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.

Stays via Stay22

Stays near Furnace Pond

Compare lakeside cabins, hotels, and vacation rentals near Furnace Pond in Plymouth County, Massachusetts — 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Furnace Pond are listed below.

Top-rated places to stay near Furnace Pond

Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.

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

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Fishing Furnace Pond

→ Furnace Pond fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Furnace Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growthOxygen depletion (low DO)

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit MA94043 · Official waterbody report

Nearby Lakes in Plymouth County

Great Sandy Bottom Pond—View →Little Sandy Bottom Pond—View →Oldham Pond—View →Stetson Pond1.6 miView →Indian Head Pond—View →Maquan Pond—View →

Frequently asked questions about Furnace Pond

Where is Furnace Pond?: Furnace Pond is a lake in Plymouth County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.
What is the water quality of Furnace Pond?: Furnace Pond in Plymouth County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Chlorophyll-a (algae): 46.8 µg/L.
Is Furnace Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Furnace Pond is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, oxygen depletion (low DO). Check local advisories before you swim.
How deep is Furnace Pond?: No published bathymetric survey covers Furnace Pond, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 38 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Can I fish at Furnace Pond?: Public access to Furnace Pond is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Massachusetts's fish and wildlife agency, so check its current regulations before you go.

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Where this data comes from

4 measurements from 2 monitoring stations, 2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

Massachusetts Department of Environmental Protection (MassDEP)MASSDEP4 samples · 2018

Analytical methods

445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence

Monitoring station identifiers (2)

EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.