Lake Havasu

Reservoir in California, near Havasu Lake, Lake Havasu and Parker Dam

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.

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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 Lake Havasu

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

Reports linked to Lake Havasu, newest first
When	Report	Status
May 11	California State Water Resources Control Board (FHAB program) · Havasu landing casino · Algae advisory · volume not reported report · notice · map	listed
Apr 16	California State Water Resources Control Board (FHAB program) · Three Dunes Campground (714DUNES3) · Algae advisory · volume not reported report · notice · map	listed
Sep 4 ’25	California State Water Resources Control Board (FHAB program) · Thompson beach at Havasu Landing · Algae advisory · volume not reported report · notice · map	listed
Jun 10 ’25	California State Water Resources Control Board (FHAB program) · Satellite Cove (714SATCOVE) · Algae advisory · volume not reported report · notice · map	listed
Jun 10 ’25	California State Water Resources Control Board (FHAB program) · Steamboat Cove (714STEAMB) · Algae advisory · volume not reported report · notice · map	listed
Jun 10 ’25	California State Water Resources Control Board (FHAB program) · Cattail Cove State Park (714CATAIL) · Algae advisory · volume not reported report · notice · map	listed
Jun 5 ’25	California State Water Resources Control Board (FHAB program) · State Park North Launch Ramp (714NORAMP) · Algae advisory · volume not reported report · notice · map	listed
May 9 ’25	California State Water Resources Control Board (FHAB program) · Parker Dam Outlet (714PDOUT) · Algae advisory · volume not reported report · notice · map	listed
Dec 9 ’22	California State Water Resources Control Board (FHAB program) · Lake Havasu State Park north launch ramp · Algae advisory · volume not reported report · notice · map	listed
Dec 9 ’22	California State Water Resources Control Board (FHAB program) · Lake Havasu State Park PWC Launch · Algae advisory · volume not reported report · notice · map	listed
Dec 9 ’22	California State Water Resources Control Board (FHAB program) · BLM Facility Dock · Algae advisory · volume not reported report · notice · map	listed
Dec 9 ’22	California State Water Resources Control Board (FHAB program) · Open Water 6 · Algae advisory · volume not reported report · notice · map	listed
Dec 9 ’22	California State Water Resources Control Board (FHAB program) · Skiers Island · Algae advisory · volume not reported report · notice · map	listed
Dec 9 ’22	California State Water Resources Control Board (FHAB program) · Steamboat Cove · Algae advisory · volume not reported report · notice · map	listed
Nov 28 ’22	California State Water Resources Control Board (FHAB program) · Castle Rock · Algae advisory · volume not reported report · notice · map	listed
Nov 28 ’22	California State Water Resources Control Board (FHAB program) · Body Beach · Algae advisory · volume not reported report · notice · map	listed
Oct 21 ’22	California State Water Resources Control Board (FHAB program) · Dock 2 west side of jetty · Algae advisory · volume not reported report · notice · map	listed
Oct 21 ’22	California State Water Resources Control Board (FHAB program) · Dock 1 east side of jetty · Algae advisory · volume not reported report · notice · map	listed
Oct 7 ’22	California State Water Resources Control Board (FHAB program) · Black meadow landing RV park · Algae advisory · volume not reported report · notice · map	listed
Aug 16 ’22to Aug 31 ’22	California State Water Resources Control Board (FHAB program) · Havasu Landing Boat Launch Ramp · Algae advisory · volume not reported report · notice · map	lifted
Jun 30 ’22to Jul 10 ’22	California State Water Resources Control Board (FHAB program) · Havasu Landing Boat Launch Ramp · Algae advisory · volume not reported report · notice · map	lifted
Jun 28 ’17to Dec 31 ’17	California State Water Resources Control Board (FHAB program) · Lake Havasu, southern end · Algae advisory · volume not reported report · notice · map	lifted
Jun 28 ’17to Dec 31 ’17	California State Water Resources Control Board (FHAB program) · Colorado River, near Parker Dam Rd · Algae advisory · volume not reported report · notice · map	lifted
Jun 28 ’17to Dec 31 ’17	California State Water Resources Control Board (FHAB program) · Colorado River, near Catfish Bay · Algae advisory · volume not reported report · notice · map	lifted
Jun 28 ’17to Dec 31 ’17	California State Water Resources Control Board (FHAB program) · Lake Havasu, near Chemehuevi Park · 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

Showing the latest 25 records of 27 records.See them all with filters.

All reports in California by year: 2026 (2 here) · 2025 (6 here) · 2022 (13 here) · 2017 (6 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

Black Meadow Landing, Parker Dam · Boat ramp

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

Nearby waters

Colorado River, CA No current status shown about 61 km away

Sources covering this water

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

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