Lake Erie Algae Bloom Growing Again

The algae bloom in Lake Erie has spread to cover much of the edge of Lake Eerie near Toledo, but toxins remain low where local communities draw drinking water supply.

1 minute read

October 4, 2017, 5:00 AM PDT

By James Brasuell @CasualBrasuell


Maumee River

Algae see spread across the Maumee River in Toledo, Ohio on September 22, 2017. | NOAA Great Lakes Environmental Research Laboratory / Flickr

Jugal K. Patel and Yuliya Parshina-Kottas provide in-depth, feature coverage of the infamous Lake Erie algae bloom, which made news in 2014, but has recently been turning Lake Erie and the Maumee River green and potentially toxic again.

The risk of algae blooms comes from the likelihood that they produce toxins like microcystis. "Dangerous levels of the toxin caused Toledo, Ohio, to shut down the drinking water supply of a half-million residents for three days in 2014," according to the article. Some 3 million residents rely on the Central Basin of Lake Eerie for drinking water, so there's a very essential risk, but tourism for recreation like fishing and beach-going are also at risk when algae blooms grow.

And the algae blooms have grown in recent decades, due to the impact of the regional agricultural industry. "According to one study by the Carnegie Institute for Science and Stanford University , most of the increase in the size of the blooms can be attributed to a rise in the amount of dissolved phosphorus flowing into the lake," write Patel and Parshina-Kottas.

The article is supplemented with lots of images and infographics to illustrate the scale of the environmental disaster persisting around Lake Erie.

Tuesday, October 3, 2017 in The New York Times

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

September 16, 2026 - Zachary Whalen

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

A coal power plant in Iowa billows smoke into the air.

Nation's most wind-powered state turns to coal as data centers increase energy demand

For the first time in decades, Iowa has increased its generation of coal power.

3 hours ago - Inside Climate News

A sign on a fence describing the rain garden behind it.

NYC cools commuters with city's first rain garden above a bus stop

New York City officials say the plants in the rain garden can absorb 16 gallons of rainwater during heavy storms.

4 hours ago - Gothamist

A map showing Brightline West's intended route from  Las Vegas to Rancho Cucamonga, California.

Brightline West’s future may rely on $6 billion federal loan

The company has until Nov. 2 to make a $400 million equity investment into its proposed high-speed rail line.

5 hours ago - Smart Cities Dive

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.