Where is Saint Marys Pond?

Saint Marys Pond is a lake in Newport County, Rhode Island. Its water-quality measurements are published by RIDEM and shown on this page as reported.

Saint Marys Pond

Newport County, Rhode Island89 acresView map Directions

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

Area

89 acres

Surface area

Shoreline

1.5 mi

Measured length

Impaired · Hydrologic alteration

See the measurements Directions Where to stay

Saint Marys Pond in Newport County, Rhode Island has water-quality measurements published by RIDEM, shown here as reported. Surface area: 89 acres.

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Saint Marys Pond is a 89-acre lake in Newport County, Rhode Island.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Saint Marys Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for hydrologic alteration, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.

Whether Saint Marys Pond 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 Saint Marys Pond

These are the measurements RIDEM publishes for Saint Marys 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. TSI undefined.

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

Lake Details

Surface area

89 acres

Shoreline

1.5 mi

No bathymetric survey has been published for Saint Marys Pond, so its depth is not documented here.

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Stays near Saint Marys Pond

Compare lakeside cabins, hotels, and vacation rentals near Saint Marys Pond in Newport 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 Saint Marys Pond

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Fishing Saint Marys Pond

→ Saint Marys Pond fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Saint Marys Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).

Causes of impairment

Hydrologic alterationNutrients (phosphorus, nitrogen)Oxygen depletion (low DO)

Designated uses not supporting: Drinking water, Aquatic life.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit RI0007035L-05 · Official waterbody report

Nearby Lakes in Newport County

Sisson Pond0.4 miView →Lawton Valley Reservoir0.8 miView →Green End Pond4 miView →Nelson Pond4.2 miView →Gardiner Pond4.5 miView →Easton Pond4.6 miView →

Frequently asked questions about Saint Marys Pond

Where is Saint Marys Pond?: Saint Marys Pond is a lake in Newport County, Rhode Island. Its water-quality measurements are published by RIDEM and shown on this page as reported.
What is the water quality of Saint Marys Pond?: Saint Marys Pond in Newport County, Rhode Island has water-quality measurements published by RIDEM, shown here as reported. Surface area: 89 acres.
Is Saint Marys Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Saint Marys Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for hydrologic alteration, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.