Lake Elsinore back open to the public

After water quality tests showed no significant health threat, Lake Elsinore today was reopened following a week long closure related to the presence of toxic algae.

“While the levels have declined, toxins still exist in the lake, particularly near the algae and scum,” according to a city statement. “Exposure to toxic algae can cause rashes, skin or eye irritation, allergic reactions or gastrointestinal problems, and can also be fatal to dogs.”

Last Thursday, the city ordered the entire body of water closed after the Southern California Coastal Water Research Project determined that the presence of blue-green algae had reached the hazardous stage.

Samples revealed high concentrations of cylindrospermopsin, anatoxin-a and microsystins — all of which can be considered dangerous at high levels and may cause harm to people, pets and livestock, city officials said.

Testing performed by regulators earlier this week concluded that closure was no longer justified. However, the city posted a warning today that swimming or wading near the shoreline should be avoided to minimize contact with algae growths.

“Do not drink the water or use it for cooking,” according to the city notice. “Avoid boating over mats of algae to prevent accidental inhalation or ingestion of spray. Do not let pets or livestock go into or drink the water, or eat scum on the shore.”

Elsinore is touted as Southern California’s largest natural freshwater lake, spanning roughly 3,300 acres and plunging to a depth of more than 30 feet at its deepest point.

Blue-green algae blooms have plagued a number of California reservoirs, including Discovery Bay, Lake Temescal and Pyramid Lake in Castaic. As the algae decays, toxins are unleashed, creating a potential public health hazard.

Researchers with the Southern California Coastal Water Research Project said the drought has exacerbated algae growth. The lake is at its lowest level since 1993 — even with recycled water inflows of more than five million gallons a day, provided by the Eastern Municipal Water District.

Weekly testing of lake samples will continue.