Slack Reservoir
Providence County, Rhode Island137 acresView mapDirections
No nutrient or algae sampling on record from RIDEM for this lake.
- Impaired · Nuisance exotic species
- 15 ft max depth
Slack Reservoir in Providence County, Rhode Island has water-quality measurements published by RIDEM, shown here as reported. Maximum depth: 15.1 ft. Surface area: 137 acres.
Slack Reservoir is a 137-acre lake in Providence County, Rhode Island with a maximum depth of 15 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Slack Reservoir is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
Whether Slack 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.
Water quality measurements for Slack Reservoir
These are the measurements RIDEM publishes for Slack 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 Slack Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
15.1 ft
Surface area
137 acres
Shoreline
5.3 mi
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Fishing Slack Reservoir
EPA Impairment Status
Slack Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit RI0002007L-03 · Official waterbody report
Nearby Lakes in Providence County
Frequently asked questions about Slack Reservoir
Where is Slack Reservoir?
- Slack 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 Slack Reservoir?
- Slack Reservoir in Providence County, Rhode Island has water-quality measurements published by RIDEM, shown here as reported. Maximum depth: 15.1 ft. Surface area: 137 acres.
Is Slack Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Slack Reservoir is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
How deep is Slack Reservoir?
- Slack Reservoir has a maximum depth of 15.1 feet. The lake covers 137 acres.
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Where this data comes from
Measurements for Slack Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database