Where is Stillwater Reservoir?

Stillwater Reservoir is a lake in Providence County, Rhode Island. Its water-quality measurements are published by RIDEM and shown on this page as reported.

Are there boat ramps on Stillwater Reservoir?

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

Can I fish at Stillwater Reservoir?

Stillwater Reservoir 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 Rhode Island's fish and wildlife agency, so check its current regulations before you go.

Stillwater Reservoir

Providence County, Rhode Island240 acresView map Directions

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

Area

240 acres

Surface area

Shoreline

5.4 mi

Measured length

Impaired · Mercury
Public access

See the measurements Directions Where to stay

Stillwater Reservoir in Providence County, Rhode Island has water-quality measurements published by RIDEM, shown here as reported. Surface area: 240 acres.

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Stillwater Reservoir is a 240-acre lake in Providence County, Rhode Island. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

What Stillwater Reservoir 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. Stillwater Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species. Check local advisories before you swim.

Whether Stillwater Reservoir is safe to swim in today is a call for the Rhode Island Department of Environmental Management and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Stillwater Reservoir

These are the measurements RIDEM publishes for Stillwater Reservoir, 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 Stillwater Reservoir

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

Lake Details

Surface area

240 acres

Shoreline

5.4 mi

Public access

Yes

Listed by RIDEM

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

Recreation & Access

Boat Landings

Yes

Public Access

Stillwater ReservoirPublic

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 Stillwater Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Stillwater Reservoir in Providence County, Rhode Island — 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 Stillwater Reservoir

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Fishing Stillwater Reservoir

→ Stillwater Reservoir fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

MercuryNuisance exotic species

Designated uses not supporting: Aquatic life, Fish consumption.

Source: EPA ATTAINS assessment unit RI0002007L-08 · Official waterbody report

Nearby Lakes in Providence County

Curran Lower Reservoir1 miView →Georgiaville Pond1.8 miView →Slack Reservoir3.1 miView →Waterman Reservoir3.1 miView →Woonsocket Reservoir Number Three3.4 miView →Moswansicut Pond4.6 miView →

Frequently asked questions about Stillwater Reservoir

Where is Stillwater Reservoir?: Stillwater Reservoir is a lake in Providence County, Rhode Island. Its water-quality measurements are published by RIDEM and shown on this page as reported.
What is the water quality of Stillwater Reservoir?: Stillwater Reservoir in Providence County, Rhode Island has water-quality measurements published by RIDEM, shown here as reported. Surface area: 240 acres.
Is Stillwater Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Stillwater Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species. Check local advisories before you swim.
Are there boat ramps on Stillwater Reservoir?: Stillwater Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Stillwater Reservoir. Public access is listed as yes.
Can I fish at Stillwater Reservoir?: Stillwater Reservoir 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 Rhode Island's fish and wildlife agency, so check its current regulations before you go.