Petrolia Lake
Petroleum County, Montana486 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
Petrolia Lake in Petroleum County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 486 acres.
Petrolia Lake is a 486-acre lake in Petroleum County, Montana.
Source: EPA Water Quality Portal sampling records, Montana DEQ. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Petrolia Lake is safe to swim in today is a call for the Montana Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Petrolia Lake
These are the measurements Montana DEQ publishes for Petrolia Lake, 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
486 acres
Shoreline
9.1 mi
No bathymetric survey has been published for Petrolia Lake, so its depth is not documented here.
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Frequently asked questions about Petrolia Lake
Where is Petrolia Lake?
- Petrolia Lake is a lake in Petroleum County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Petrolia Lake?
- Petrolia Lake in Petroleum County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 486 acres.
Is Petrolia Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Petrolia Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.