Lake Havasu (Arizona): toxic algae advisories
Lake Havasu (Arizona), Arizona State.
What the state's records say
Caution advisory, last posted Apr 16, 2026. No all-clear recorded.
4 reported spots here have an advisory with no all-clear recorded.
Reporting is voluntary, so the state may not have recorded an end even if conditions changed. Check posted signs and the official map.
What this level asks: Algae that can make toxins may be present. Keep people, children and pets away from algae and scum, and do not let pets drink the water.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Lake Havasu (Arizona)
The state has an advisory on file for Lake Havasu (Arizona) (Caution advisory), last posted Apr 16, 2026, and no all-clear recorded. Keep your dog out of the water and away from scum on the shore until the state records an end.
Reported spots
The state records each report at a spot, such as a beach or a boat ramp. Each spot's latest deciding record:
| Spot | Status |
|---|---|
| State Park North Launch Ramp (714NORAMP) | Caution advisory, last posted Apr 16, 2026. No all-clear recorded. |
| Steamboat Cove (714STEAMB) | Caution advisory, last posted Apr 16, 2026. No all-clear recorded. |
| Three Dunes Campground (714DUNES3) | Caution advisory, last posted Apr 16, 2026. No all-clear recorded. |
| Cattail Cove State Park (714CATAIL) | Caution advisory, last posted Apr 16, 2026. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Lake Havasu (Arizona), newest first. "None" is the state's record that no advisory was recommended on that date. "NA" records do not change a status.
| Date | Spot | State's level | Notes |
|---|---|---|---|
| Apr 16, 2026 | State Park North Launch Ramp (714NORAMP) | Caution | Updates from routine monitoring program-organization |
| Apr 16, 2026 | Steamboat Cove (714STEAMB) | Caution | Updates from routine monitoring program-organization |
| Apr 16, 2026 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Apr 16, 2026 | Three Dunes Campground (714DUNES3) | Caution | Updates from routine monitoring program-organization |
| Apr 16, 2026 | Cattail Cove State Park (714CATAIL) | Caution | Updates from routine monitoring program-organization |
| Mar 12, 2026 | State Park North Launch Ramp (714NORAMP) | Caution | Testing results below posting triggers |
| Mar 12, 2026 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Mar 12, 2026 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Mar 12, 2026 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Mar 12, 2026 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Feb 11, 2026 | State Park North Launch Ramp (714NORAMP) | None | Testing results below posting triggers |
| Feb 11, 2026 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Feb 11, 2026 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Feb 11, 2026 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Jan 22, 2026 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Jan 22, 2026 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Jan 22, 2026 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Jan 22, 2026 | State Park North Launch Ramp (714NORAMP) | None | Testing results below posting triggers |
| Dec 18, 2025 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Dec 18, 2025 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Dec 18, 2025 | State Park North Launch Ramp (714NORAMP) | None | Testing results below posting triggers |
| Nov 14, 2025 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Nov 14, 2025 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Nov 13, 2025 | State Park North Launch Ramp (714NORAMP) | None | Testing results below posting triggers |
| Oct 15, 2025 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Oct 15, 2025 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Oct 15, 2025 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Oct 15, 2025 | State Park North Launch Ramp (714NORAMP) | None | Testing results below posting triggers |
| Sep 18, 2025 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Sep 18, 2025 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Sep 18, 2025 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Aug 14, 2025 | State Park North Launch Ramp (714NORAMP) | None | Testing results below posting triggers |
| Aug 14, 2025 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Aug 14, 2025 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Aug 14, 2025 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Jul 16, 2025 | State Park North Launch Ramp (714NORAMP) | None | Testing results below posting triggers |
| Jul 16, 2025 | Steamboat Cove (714STEAMB) | None | Updates from routine monitoring program-organization |
| Jul 16, 2025 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Jul 16, 2025 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Jun 10, 2025 | Steamboat Cove (714STEAMB) | Blank in the state's file | Updates from routine monitoring program-organization |
| Jun 10, 2025 | Three Dunes Campground (714DUNES3) | None | Updates from routine monitoring program-organization |
| Jun 10, 2025 | Cattail Cove State Park (714CATAIL) | None | Updates from routine monitoring program-organization |
| Jun 5, 2025 | State Park North Launch Ramp (714NORAMP) | Blank in the state's file | Testing results below posting triggers |
Source
Advisory data: California State Water Resources Control Board, Freshwater Harmful Algal Bloom Program, via data.ca.gov (public domain). Advisories are recommendations; reporting is voluntary and incomplete. The state's data. An advisory ends only when the state records a later "None" (no advisory recommended) at the same spot, or an end date. A blank end date is unknown.