Hume Lake: toxic algae advisories
Hume Lake, Fresno County. See all Fresno County waters.
What the state's records say
Caution advisory, last posted Jul 29, 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 Hume Lake
The state has an advisory on file for Hume Lake (Caution advisory), last posted Jul 29, 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 |
|---|---|
| Beach near lake access parking lot | Reports on file, with no advisory level the state has classified. |
| north | Caution advisory, last posted Jul 29, 2026. No all-clear recorded. |
| west | Caution advisory, last posted Jul 29, 2026. No all-clear recorded. |
| east | Caution advisory, last posted Jul 29, 2026. No all-clear recorded. |
| Sequoia National Forest | Caution advisory, last posted Jul 21, 2026. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Hume Lake, 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 |
|---|---|---|---|
| Oct 14, 2026 | Beach near lake access parking lot | NA - refer to Report Details | Suspected illness reported |
| Jul 29, 2026 | north | Caution | Testing results below posting triggers; visual monitoring based advisory |
| Jul 29, 2026 | west | Caution | Testing results below posting triggers; visual monitoring based advisory |
| Jul 29, 2026 | east | Caution | Testing results below posting triggers; visual monitoring based advisory |
| Jul 21, 2026 | Sequoia National Forest | Caution | Suspected bloom, investigation ongoing |
| Jul 17, 2026 | Sequoia National Forest | NA - refer to Report Details | Under investigation |
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.