(1 of ) Ashley Brown of the Sonoma County department of Health Services staples a precaution notice alerting visitors to positive test results for a potentially dangerous naturally occurring neurotoxin, Anatoxin-a, linked to harmful type of blue-green algae, Wednesday July 27, 2017 at Healdsburg Memorial Beach, (Kent Porter / Press Democrat) 2017
MARY CALLAHAN
THE PRESS DEMOCRAT | August 10, 2017, 5:17PM
The Russian River tested clean this week for a toxin related to blue-green algae that prompted cautionary signs at 10 popular beaches last month and in each of the past two summers.
The river remains open to swimming and other recreation. But warning signs urging visitors to avoid ingesting river water will remain at 10 popular beaches between Cloverdale and the river mouth as a precaution against exposure to the neurotoxin involved, the Sonoma County Department of Health Services said.
The weekly sampling suggests the threat, already minimal, could be diminishing. But precautions can only be lifted after several weeks pass without detection of the neurotoxin called anatoxin-a, county health personnel said.
State guidelines developed for static bodies of water like lakes require at least two weeks of negative test results for blue-green algae, formally called cyanobacteria, before the signs can come down, Sonoma County Health Officer Karen Milman said Thursday.
In a long swath of water with a moving current, theres greater potential for harmful blue-green algae to relocate and be present in an area that hasnt been tested, indicating a more conservative approach may be prudent.
In addition, county environmental health personnel monitoring the Russian River have seen growth of blue-green algae that still could release toxins at some point, as well as filamentous green algae in which cyanobacteria can intermix, Milman said.
Besides testing, we want to take into account other things, she said.
County environmental health personnel posted the caution signs July 27 after routine testing of river samples revealed very low levels of anatoxin-a, a potentially dangerous substance naturally produced by certain kinds of blue-green algae, which have proliferated in fresh water lakes, ponds and streams around California and the rest of the planet in recent years.
Anatoxin-a attacks the nervous system, causing symptoms that may include staggering, fatigue, convulsions, paralysis or even death.
Dogs and small children are particularly susceptible, given their size and potential for ingesting contaminated water. Studies indicate the odor of blue-green algae actually attracts dogs, who may eat it.
Two dogs died after frolicking in the Russian River near Healdsburg in 2015 at the height of Californias historic drought prompting widespread awareness of the potential for harmful algae blooms in warm, slow-moving water.
But after plentiful rain this past winter, water quality officials say, abundant runoff could have increased concentrations of nitrogen, phosphorous and other substances from fertilizer and other sources that feed toxic algae blooms.
The levels of anatoxin-a detected first at Cloverdale River Park Beach, Del Rio Woods Beach in Healdsburg and Patterson Point beach, located just downstream of Monte Rio, were extremely low, averaging 0.15 micrograms of toxin per liter of water.
Warnings against swimming and other water recreation arent required until at least 20 micrograms per liter is present.
But the state requires public notifications even when the smallest concentrations of anatoxin-a are present and a beach remains open to recreation, which has been the case with the Russian River in recent weeks.
Health officials urge visitors to avoid algae in the water and refrain from drinking, cooking with or washing dishes with river water. In addition, they advise bathing after exposure to river water, monitoring children closely and preventing dogs and other animals from drinking river water or eating algae scums.
Here is the original post:
Blue-green algae-related toxin warnings remain at Russian River beaches - Santa Rosa Press Democrat
- Seabean Symposium-Live Blogging - November 8th, 2009 [November 8th, 2009]
- Alvaro Jaramillo Talks Gulls at 2010 Space Coast Birding Festival - November 8th, 2009 [November 8th, 2009]
- Fall Sunset on Anna Maria - November 8th, 2009 [November 8th, 2009]
- Fort Myers Beach Photos Revisited - November 8th, 2009 [November 8th, 2009]
- Reinier Munguia Keynote at Space Coast Birding & Wildlife Festival - November 8th, 2009 [November 8th, 2009]
- Wilderness Matters - November 8th, 2009 [November 8th, 2009]
- Raptor Project Brings Winged Predators to Space Coast Birding Festival - November 8th, 2009 [November 8th, 2009]
- Sandscupting Festival on Fort Myers Beach - November 8th, 2009 [November 8th, 2009]
- David Allen Sibley to Deliver Keynote at Space Coast Birding & Wildlife Festival 2010 - November 8th, 2009 [November 8th, 2009]
- Kevin Mims & Paddle Florida on the Suwannee River - November 8th, 2009 [November 8th, 2009]
- Zipolite Beach, Oaxaca, Mexico, Central America - November 8th, 2009 [November 8th, 2009]
- Port Charlotte Beach Park, Port Charlotte, Florida - November 8th, 2009 [November 8th, 2009]
- The Kent in South Beach, Miami – Budget Beach Hotel in Florida - November 8th, 2009 [November 8th, 2009]
- Key West, Florida Dog Beach – Where Pooches Can Play - November 8th, 2009 [November 8th, 2009]
- The Startling White Sand of Hyams Beach, New South Wales, Australia - November 8th, 2009 [November 8th, 2009]
- Palm Island Beach, Cape Haze, Florida - November 8th, 2009 [November 8th, 2009]
- A Surfer’s Paradise at Punta Morena Beach, Cozumel - November 8th, 2009 [November 8th, 2009]
- Sand the Color of Olives: Papakolea Beach, Hawaii - November 8th, 2009 [November 8th, 2009]
- Hilton Sandestin Beach Golf Resort & Spa in Destin, Florida - November 8th, 2009 [November 8th, 2009]
- Visiting Indialantic Beach? Check out the Crowne Plaza Melbourne Beach - December 13th, 2009 [December 13th, 2009]
- Say Good-bye to Manatee County Public Beach Pier - December 13th, 2009 [December 13th, 2009]
- Eco-tourism Field Trips at the Space Coast Birding & Wildlife Festival - December 13th, 2009 [December 13th, 2009]
- Birding at Sea: Pelagic Birding Aboard the Pastime Princess - December 13th, 2009 [December 13th, 2009]
- Space Coast Birding & Wildlife Festival Video Clip - December 13th, 2009 [December 13th, 2009]
- Gulfster’s Surf Trip to Puerto Rico - December 13th, 2009 [December 13th, 2009]
- Holiday Candlelight Tour of Homes, St. Petersburg, FL - December 13th, 2009 [December 13th, 2009]
- Kevin Mims: An Outdoorsman to Follow - December 13th, 2009 [December 13th, 2009]
- How Big is This Wave? - December 13th, 2009 [December 13th, 2009]
- Birders: Making a List and Checking it Forever - December 13th, 2009 [December 13th, 2009]
- Hunting Island State Park – Dog Friendly Beach in Beaufort, SC - December 13th, 2009 [December 13th, 2009]
- Beach Hotels in Ocean Park, Washington - December 13th, 2009 [December 13th, 2009]
- San Diego, CA – Ocean Beach Dog Beach - December 13th, 2009 [December 13th, 2009]
- Best Beaches for Collecting Sea Glass - December 13th, 2009 [December 13th, 2009]
- Swimwear in 2010 combines key trends - December 13th, 2009 [December 13th, 2009]
- S-Turns Beach in Rodanthe, Outer Banks of North Carolina, Wiped Out By Nor’easter - December 13th, 2009 [December 13th, 2009]
- In Awe at the Okinawa Churaumi Aquarium in Okinawa, Japan - December 13th, 2009 [December 13th, 2009]
- Summertime in the Outer Banks, North Carolina - December 13th, 2009 [December 13th, 2009]
- Panama City Beach May Not Welcome Spring Breakers in 2010 - December 13th, 2009 [December 13th, 2009]
- Bahia Honda Beach near Key West, Florida - December 13th, 2009 [December 13th, 2009]
- U.S. Supreme Court Hears Case Regarding Florida Beach Ownership - December 14th, 2009 [December 14th, 2009]
- Historic Sites of Canaveral National Seashore - December 19th, 2009 [December 19th, 2009]
- Myrtle Beach Building Boardwak Along Beachfront, Adding Amenities - December 19th, 2009 [December 19th, 2009]
- Barrier Island Center Upcoming Events 2010 – Melbourne Beach, Florida - December 19th, 2009 [December 19th, 2009]
- Florida Wildflowers & Plants – Space Coast Birding Festival Field Trip - December 20th, 2009 [December 20th, 2009]
- Jellyfish in Long Beach Aquarium - December 20th, 2009 [December 20th, 2009]
- Heron Island in Great Barrier Reef under new management - December 21st, 2009 [December 21st, 2009]
- Sunset on Longboat Key - December 23rd, 2009 [December 23rd, 2009]
- Pishing With Pete at the Space Coast Birding Festival - December 23rd, 2009 [December 23rd, 2009]
- Summer is Over, but it Lives on My Hard Drive - December 25th, 2009 [December 25th, 2009]
- 800 Pound Beachball to Drop Over Panama City Beach, Florida on New Year’s Eve - December 27th, 2009 [December 27th, 2009]
- Birding by Ear and Habitat with Paddy Cunningham-Pascatore - December 27th, 2009 [December 27th, 2009]
- Prevention of Overfishing of Coral Reefs Reduces Occurrence of Coral Diseases - December 28th, 2009 [December 28th, 2009]
- Florida Screech Owls Encouraged by Nest Boxes - December 28th, 2009 [December 28th, 2009]
- Cayo Costa Photo Memories - December 28th, 2009 [December 28th, 2009]
- Family Activities at the Space Coast Birding & Wildlife Festival - December 31st, 2009 [December 31st, 2009]
- BeachHunter’s Top 10 Beach Photos in 2009 - January 2nd, 2010 [January 2nd, 2010]
- Viera Wetlands is a Premier Birding Destination in Brevard County - January 2nd, 2010 [January 2nd, 2010]
- Here are a Few More Florida Summer Beach Memories. - January 3rd, 2010 [January 3rd, 2010]
- Lake Morat Puts the Beach in Swiss Beaches - January 6th, 2010 [January 6th, 2010]
- Smoking Banned at Beaches Around the Country - January 6th, 2010 [January 6th, 2010]
- Identifying Gulls – A Field Trip to Brevard County Landfill - January 6th, 2010 [January 6th, 2010]
- Victoria and Albert Museum in London Sponsors World Beach Project - January 7th, 2010 [January 7th, 2010]
- Does It Snow in Florida? - January 9th, 2010 [January 9th, 2010]
- Sun, sand and history found in Bodrum, Turkey - January 9th, 2010 [January 9th, 2010]
- Winter swimming rules at Den Haag’s beaches. - January 9th, 2010 [January 9th, 2010]
- Boats, Kayaks and Birds - January 10th, 2010 [January 10th, 2010]
- Snorkeling with Sea Turtles in Akumal, Mexico - January 11th, 2010 [January 11th, 2010]
- A Hidden Gem – San Agustinillo, Oaxaca, Mexico - January 12th, 2010 [January 12th, 2010]
- Penguins on the Beach at Betty’s Bay - January 12th, 2010 [January 12th, 2010]
- Robert Amoruso Photography Workshops at Space Coast Birding Festival - January 12th, 2010 [January 12th, 2010]
- Scuba Diving with Bull Sharks in Playa Del Carmen, Mexico - January 13th, 2010 [January 13th, 2010]
- California Beach Tradition Threatened - January 13th, 2010 [January 13th, 2010]
- Who’s Going to the 13th Annual Space Coast Birding & Wildlife Festival? - January 15th, 2010 [January 15th, 2010]
- Getting Away From It All in the Dry Tortugas - January 16th, 2010 [January 16th, 2010]
- History of the Bikini - January 19th, 2010 [January 19th, 2010]
- Conservation and the Economics of Birding - January 20th, 2010 [January 20th, 2010]
- Landlocked Swiss Hit the Beach at Lake Zurich - January 21st, 2010 [January 21st, 2010]
- Northern Ireland’s Blue Flag Beaches - January 22nd, 2010 [January 22nd, 2010]
- A beach of sorts in old Dun Laoghaire. - January 22nd, 2010 [January 22nd, 2010]
- Beach Sunrise Memories - January 22nd, 2010 [January 22nd, 2010]