Keswick Reservoir
Shasta County, California640 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
- Public access
- Limited data
Keswick Reservoir in Shasta County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 640 acres.
Keswick Reservoir is a 640-acre lake in Shasta County, California. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-04-10. Methodology: how these readings are compared.
What Keswick Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Keswick 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 Keswick Reservoir
These are the measurements SWRCB publishes for Keswick 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 Keswick Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
640 acres
Public access
Yes
Listed by SWRCB
No bathymetric survey has been published for Keswick Reservoir, so its depth is not documented here.
Recreation & Access
- Keswick BoatPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Keswick Reservoir
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Fishing Keswick Reservoir
Reservoir Info (USACE NID)
Keswick Reservoir is a man-made reservoir impounded by the Keswick Dam (completed 1950), built primarily for flood risk reduction on the Sacramento River; concrete-type dam, 157 ft tall and 1,046 ft long.
- Surface area
- 640 ac
- Normal storage
- 7,470 ac-ft
- Max storage
- 25,132 ac-ft
- Drainage area
- 6,032.87 sq mi
- Hazard class
- High
- Owner
- BUREAU OF RECLAMATION
All listed purposes: Flood Risk Reduction;Irrigation;Hydroelectric.
Source: USACE National Inventory of Dams, NID ID CA10160 · Operator website
Nearby Lakes in Shasta County
Frequently asked questions about Keswick Reservoir
Where is Keswick Reservoir?
- Keswick Reservoir is a lake in Shasta County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Keswick Reservoir?
- Keswick Reservoir in Shasta County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 640 acres.
Is Keswick Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Keswick Reservoir?
- Keswick Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Keswick Boat. Public access is listed as yes.
Can I fish at Keswick Reservoir?
- Keswick Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by California's fish and wildlife agency, so check its current regulations before you go.
Explore Keswick Reservoir across LakeQuality
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Where this data comes from
3 measurements from 3 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- USGS California Water Science Center
USGS-CA3 samples · 2022
Analytical methods
- YSI Environmental, sensor 6136
Monitoring station identifiers (3)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory