La Grande Reservoir
Union County, Oregon33 acresView mapDirections
No nutrient or algae sampling on record from Oregon DEQ for this lake.
- Impaired · Sediment / turbidity
La Grande Reservoir in Union County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 33 acres.
La Grande Reservoir is a 33-acre lake in Union County, Oregon.
Source: EPA Water Quality Portal sampling records, Oregon DEQ. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. La Grande Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for sediment / turbidity. Check local advisories before you swim.
Whether La Grande Reservoir is safe to swim in today is a call for the Oregon Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for La Grande Reservoir
These are the measurements Oregon DEQ publishes for La Grande 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 La Grande Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
33 acres
Shoreline
1.4 mi
No bathymetric survey has been published for La Grande Reservoir, so its depth is not documented here.
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Stays near La Grande Reservoir
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Fishing La Grande Reservoir
EPA Impairment Status
La Grande Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit OR_LK_1706010403_02_100608 · Official waterbody report
Nearby Lakes in Union County
Frequently asked questions about La Grande Reservoir
Where is La Grande Reservoir?
- La Grande Reservoir is a lake in Union County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of La Grande Reservoir?
- La Grande Reservoir in Union County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 33 acres.
Is La Grande Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. La Grande Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for sediment / turbidity. Check local advisories before you swim.
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Where this data comes from
Measurements for La Grande 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