Cogswell Reservoir
Los Angeles County, California145 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
Cogswell Reservoir in Los Angeles County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 145 acres.
Cogswell Reservoir is a 145-acre lake in Los Angeles County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Cogswell Reservoir is good for
From access and monitoring records, not editorial picks.
- Camping2 public campgrounds nearby
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Cogswell Reservoir 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 Cogswell Reservoir
These are the measurements SWRCB publishes for Cogswell 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 Cogswell Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
145 acres
Shoreline
7 mi
No bathymetric survey has been published for Cogswell Reservoir, so its depth is not documented here.
Recreation & Access
Public campgrounds near Cogswell Reservoir
- Glenn Camp1.7 km
- Spring Camp3.2 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Cogswell Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Cogswell Reservoir in Los Angeles County, California — 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 Cogswell Reservoir
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Fishing Cogswell Reservoir
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Frequently asked questions about Cogswell Reservoir
Where is Cogswell Reservoir?
- Cogswell Reservoir is a lake in Los Angeles County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Cogswell Reservoir?
- Cogswell Reservoir in Los Angeles County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 145 acres.
Is Cogswell Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Cogswell Reservoir?
- Cogswell Reservoir has 2 public campgrounds from USGS The National Map within 5 km, including Glenn Camp, Spring Camp. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
Measurements for Cogswell Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Public campgrounds from USGS The National Map Structures, within about 3 miles