Where is East Park Reservoir?

East Park Reservoir is a lake in Colusa County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.

East Park Reservoir

Colusa County, California1,334 acresView map Directions

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

Area

1,334 acres

Surface area

Impaired · Mercury
Limited data

See the measurements Directions Where to stay

East Park Reservoir in Colusa County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 1334 acres.

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East Park Reservoir is a 1,334-acre lake in Colusa County, California.

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

What East Park Reservoir is good for

From access and monitoring records, not editorial picks.

Big water1,334 acres

Swimming conditions

No reading

Limited data

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

Whether East Park 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.

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Water quality measurements for East Park Reservoir

These are the measurements SWRCB publishes for East Park 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.

Ask about East Park Reservoir

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

Lake Details

Surface area

1,334 acres

No bathymetric survey has been published for East Park Reservoir, so its depth is not documented here.

Stays via Stay22

Stays near East Park Reservoir

Compare lakeside cabins, hotels, and vacation rentals near East Park Reservoir in Colusa 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 East Park Reservoir

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

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Follow East Park Reservoir’s readings

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Fishing East Park Reservoir

→ East Park Reservoir fishing regulations (limits, seasons, special rules)

EPA Impairment Status

East Park Reservoir 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 CAL5223300020020418140610 · Official waterbody report

Nearby Lakes in Colusa County

Upper Letts Lake11.4 miView →Powell Slough—View →Stony Gorge Reservoir15.3 miView →Kayan Pond17.3 miView →Tule Pond17.6 miView →Housing Pond17.8 miView →

Frequently asked questions about East Park Reservoir

Where is East Park Reservoir?: East Park Reservoir is a lake in Colusa County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of East Park Reservoir?: East Park Reservoir in Colusa County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 1334 acres.
Is East Park Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. East Park Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.