Where is Laguna Lake?

Laguna Lake is a lake in San Luis Obispo County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.

Laguna Lake

San Luis Obispo County, California100 acresView map Directions

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

Area

100 acres

Surface area

Shoreline

4.3 mi

Measured length

Impaired · Biotoxins

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Laguna Lake in San Luis Obispo County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 100 acres.

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Laguna Lake is a 100-acre lake in San Luis Obispo County, California.

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

Swimming conditions

No reading

Bacteria advisory

Nutrient and algae readings are not a swimming clearance. Laguna Lake is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins. Check local advisories before you swim.

Whether Laguna Lake 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.

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Water quality measurements for Laguna Lake

These are the measurements SWRCB publishes for Laguna 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.

Ask about Laguna Lake

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

Lake Details

Surface area

100 acres

Shoreline

4.3 mi

No bathymetric survey has been published for Laguna Lake, so its depth is not documented here.

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Stays near Laguna Lake

Compare lakeside cabins, hotels, and vacation rentals near Laguna Lake in San Luis Obispo 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 Laguna Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Fishing Laguna Lake

→ Laguna Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Laguna Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Biotoxins

Designated uses not supporting: Drinking water, Recreation, Other.

Source: EPA ATTAINS assessment unit CAL3102401020191031047091 · Official waterbody report

Nearby Lakes in San Luis Obispo County

Lopez Reservoir10.8 miView →Atascadero Lake13.8 miView →Santa Margarita Lake12.2 miView →White Lake14.6 miView →Lopez Lake12.5 miView →Oso Flaco Lake16.7 miView →

Frequently asked questions about Laguna Lake

Where is Laguna Lake?: Laguna Lake is a lake in San Luis Obispo County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Laguna Lake?: Laguna Lake in San Luis Obispo County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 100 acres.
Is Laguna Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Laguna Lake is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins. Check local advisories before you swim.