algae bloom

Is An Algae Bloom Coming … To Creeks Of Whitehall Bay?

May 3, 2021

It’s cold out on the Severn In April! Yet, our intrepid Water Quality Teams were out braving the weather to get an early start on tracking conditions in the Severn River. Evidence is mounting in the Creeks of Whitehall Bay that something untoward is developing – the beginnings of an algae bloom like the Mahogany […]

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Algae Bloom Returns To Upper River

October 14, 2020

Terrible news to report for the upper Severn River yesterday – the giant algae bloom is back. The river from Severn Run headwaters and outside Bear Branch at Ben Oaks is infested with the algae that creates the Mahogany Blooms. Our Water Quality Monitoring teams have tracked the emergence of this bloom on their weekly […]

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Mahogany Tide Just Wouldn’t Go Away!

July 13, 2020

As of early July 14, much of the Severn River was still experiencing the muddy-orange-brown color caused by the algae bloom known as the Mahogany Tide. The ugly, rusty, orange-brown color is caused by an algae species called prorocentrum minimum. Algae blooms are natural occurrence and are a food source for fish. But when you […]

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Water Quality Update – Return Of The Orange Blob!

May 29, 2020

Annapolis – May 26, 2020 (updated 5.29.20).  That ugly red-brown water we’re witnessing in the Severn River right now is an algae bloom, the infamous Mahogany Tide. The top picture at right is what the algae bloom did to the harbor in West Severna Park. The picture below is what the harbor in West Severna […]

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Another Algae Bloom … Now In Fresh Water

February 17, 2020

There’s more than one algae bloom revealing itself in the Severn River watershed — in the middle of winter 2020. Our intrepid Field Investigator, Izzie Ketcham, has discovered a green tide in a non-tidal freshwater pond that feeds into the Severn River via Chase Creek. This is the green color in the picture at right […]

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Winter Algae Bloom Muck’s Up The Severn

January 6, 2020

ANNAPOLIS, Dec. 29, 2019 — The muddy orange color mucking up the Severn River is a rare (hopefully) winter algae bloom. Reports of the algae bloom started over a week ago. Our first call came in from a north branch of Chase Creek. At left is what the algae did to the once-clear waters of […]

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