Shasta Lake

Reservoir in California, near Lakehead, Redding and Shasta Lake

No current status shown

No current status is assigned to this water outline. Check the water page for reports and any estimated downstream stretches. Why this status, and its source

Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.

Square boat markers mark boat launches listed by OpenBoatLaunch.

Bookmark this water page and check it before each trip · Report a missing notice or error

About this status

No current status shown: no report we track sets a status on this water now; how statuses work. No status does not mean the water is safe. Follow posted signs and local health advice.

Sources checked: Surface Water - Freshwater Harmful Algal Blooms (last successful check 2026-11-06 08:37 UTC). Status by DirtyWaterWatch, updated 2026-11-06 09:03 UTC. · Updated Nov 6, 2026, 1:03 AM PST

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Plum: algal bloom advisory. Red or amber with a light line inside: beach advisory or caution. Dotted: monthly report (days with discharge, dates not given). Grey: no current status on the water outline. Purple hatching: a status resting on a source that could not be checked on schedule.

No discharge, advisory or caution periods are shown for this water in this time span. Check downstream stretches and source coverage.

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-06 09:03 UTC.

Reported discharges over time

Historical charts are not available here. See the reports and sources on this page.

Reports linked to Shasta Lake

Cyanobacteria (harmful blue-green algae) can make water unfit for contact; the issuing authority decides when its advisory ends.

Reports linked to Shasta Lake, newest first
When	Report	Status
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Antlers Area · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - O'Brien area · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Sacramento Arm · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Digger Bay · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Bridge Bay · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - McCloud Arm · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Holiday Harbor · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Jones Valley · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Silverthorn · Algae advisory · volume not reported report · notice · map	lifted
Sep 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake - Squaw Arm · Algae advisory · volume not reported report · notice · map	lifted
Jul 12 ’16to Dec 31 ’16	California State Water Resources Control Board (FHAB program) · Shasta Lake/Pit River Arm · Algae advisory · volume not reported report · notice · map	lifted

Sources: Surface Water - Freshwater Harmful Algal Blooms, retrieved 2026-11-06 03:07 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

All reports in California by year: 2016 (11 here)

Wastewater outlets on this water

Outfall: a pipe or outlet where wastewater enters a water body.

No wastewater outlet in our records is linked to this water.

Boat launches

Shasta Lake (Antlers Ramp), Lakehead · Boat ramp
Shasta Lake (Bailey Cove Ramp), Lakehead · Boat ramp
Shasta Lake (Centimudi Ramp), Lakehead · Boat ramp
Shasta Lake (Hirz Bay Ramp), Lakehead · Boat ramp
Shasta Lake (Jones Valley Ramp), Redding · Boat ramp
Shasta Lake (Packers Bay Ramp), Lakehead · Boat ramp

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Shasta Lake on OpenBoatLaunch

Nearby waters

Churn Creek, CA No current status shown about 28 km away
Cottonwood Creek, CA No current status shown about 51 km away
Lake Britton, CA No current status shown about 56 km away
South Fork Battle Creek, CA No current status shown about 63 km away
Pit River, CA No current status shown about 73 km away

Sources covering this water

Surface Water - Freshwater Harmful Algal Blooms · Latest check succeeded · Last successful check: 2026-11-06 08:37 UTC

11 records linked to this water. Updated Nov 6, 2026, 1:03 AM PST.