Lake Gregory
San Bernardino County, California81 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
- Impaired · Mercury
- 45 ft max depth
- Limited data
Lake Gregory in San Bernardino County, California has water-quality measurements published by SWRCB, shown here as reported. Maximum depth: 45 ft. Surface area: 81 acres.
Lake Gregory is a 81-acre lake in San Bernardino County, California with a maximum depth of 45 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Lake Gregory is good for
From access and monitoring records, not editorial picks.
- Deep water45 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Lake Gregory is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pesticides. Check local advisories before you swim.
Whether Lake Gregory is safe to swim in today is a call for the California State Water Resources Control Board and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Gregory
These are the measurements SWRCB publishes for Lake Gregory, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Lake Gregory
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
45 ft
Surface area
81 acres
Shoreline
2.4 mi
Stays via Stay22
Stays near Lake Gregory
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Fishing Lake Gregory
EPA Impairment Status
Lake Gregory is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption, Other.
Source: EPA ATTAINS assessment unit CAL6282000020000218114909 · Official waterbody report
Nearby Lakes in San Bernardino County
Frequently asked questions about Lake Gregory
Where is Lake Gregory?
- Lake Gregory is a lake in San Bernardino County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Lake Gregory?
- Lake Gregory in San Bernardino County, California has water-quality measurements published by SWRCB, shown here as reported. Maximum depth: 45 ft. Surface area: 81 acres.
Is Lake Gregory safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Gregory is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pesticides. Check local advisories before you swim.
How deep is Lake Gregory?
- Lake Gregory has a maximum depth of 45 feet. The lake covers 81 acres.
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Where this data comes from
Measurements for Lake Gregory 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