Where is Castac Lake?

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

Castac Lake

Kern County, California210 acresView map Directions

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

Area

210 acres

Surface area

Impaired · Mercury
Limited data

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Castac Lake in Kern County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 210 acres.

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Castac Lake is a 210-acre lake in Kern County, California.

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

Swimming conditions

No reading

Limited data

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

Whether Castac 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 Castac Lake

These are the measurements SWRCB publishes for Castac 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.

Ask about Castac Lake

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

Lake Details

Surface area

210 acres

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

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Stays near Castac Lake

Compare lakeside cabins, hotels, and vacation rentals near Castac Lake in Kern 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 Castac Lake

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Fishing Castac Lake

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

EPA Impairment Status

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

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption, Other.

Source: EPA ATTAINS assessment unit CAL5563006320091208115141 · Official waterbody report

Nearby Lakes in Kern County

Tejon Reservoir Number Two14.8 miView →Lake Webb—View →Lake Ming—View →Isabella Lake—View →Lake Woollomes—View →

Frequently asked questions about Castac Lake

Where is Castac Lake?: Castac Lake is a lake in Kern County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Castac Lake?: Castac Lake in Kern County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 210 acres.
Is Castac Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Castac Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.