Water Quality

Close-up on back of yellow truck putting down road salt on icy road.

Winter Road Salt is Making Waterways Toxic to Wildlife

Salt used to clear streets is accumulating in local creeks and rivers and seeping into groundwater, contaminating fresh water supplies.

December 21, 2025 - WHYY

Flooded Mississippi River next to Gateway Arch in St. Louis, Missouri.

St. Louis has a Secret Stormwater Weapon Saving 100 Million Gallons from the Mississippi

The city reimburses residents who install gardens, rain barrels, and other methods that retain stormwater and decrease the risk of flooding.

October 21, 2025 - Reasons to Be Cheerful

People in swim caps swimming in Chicago River wearing bright orange buoys.

Chicago River Clean Enough for Swimming for the First Time in 98 Years

A historic two-mile river race through downtown highlighted the success of decades-long efforts to clean up the city’s river.

September 23, 2025 - Inside Climate News

People swimming in Rhine River on a sunny day with low-rise, dense buildings along waterfront in background.

Is Your City Swimmable?

An interview with organizers of the inaugural Swimmable Cities Summit, which took place this June 22-24 in Rotterdam, NL.

June 30, 2025 - Mark Tirpak

Pump station with blue pipes coming out of concrete wall in Seattle, Washington.

Seattle Builds Subway-Sized Tunnel — for Stormwater

The $700 million ‘stormwater subway’ is designed to handle overflows during storms, which contain toxic runoff from roadways and vehicles.

May 13, 2025 - City Observatory

Sign warning of toxic algae bloom at Lake Erie beach in Ohio.

NOAA Great Lakes Lab Loses Key Funding

Cuts at a lab that monitors water quality in the Great Lakes region could harm efforts to prevent dangerous algal blooms.

May 13, 2025 - ProPublica

Colorful sunset view over Chattahoochee River in Georgia.

Comment: EPA Cuts will Send Atlanta Back to Eye-burning Ozone, Lung-damaging Smog, and Raw Sewage in the Chattahoochee River

A veteran political journalist takes stock of the hard-earned ground Georgia stands to lose with slashed environmental protection.

April 14, 2025 - Georgia Recorder

Snow geese at the Sacramento National Wildlife Refuge, California

California Lawmakers Move to Protect Waterways

Anticipating that the Trump EPA will reinstate a 2017 policy that excluded seasonal wetlands and waterways from environmental protections.

March 18, 2025 - CALmatters

Water purification plant in El Paso, Texas on riverfront.

El Paso Wastewater Purification Facility Breaks Ground

As water supplies become strained and technology advances, cities look to wastewater as a viable source of drinking water.

March 6, 2025 - Governing

Man sitting in chair along River Seine in Paris with fishing pole.

River Seine ‘Teeming’ With Life

Decades of restoration efforts are yielding positive results as dozens of species of fish return to the once-polluted waterway.

February 11, 2025 - Reasons to Be Cheerful

Small mountain lake with snow-capped mountains in background in Eastern Sierra Nevada mountains in California.

California Approves $10 Billion Bond for Water, Clean Energy, and Environmental Projects

Funds will be used to support water, wildfire prevention, environmental, and park projects, reflecting strong public support for climate resilience.

November 7, 2024 - Los Angeles Times

Gaslamp Quarter

America’s 10 ‘Greenest’ Cities

A new analysis ranks cities based on their environmental quality, energy consumption and production, transportation, density, and other factors.

October 28, 2024 - The Street

Aerial view of the Danube River in Belgrade, Serbia.

Report: European Rivers Are in Trouble

Some of the continent’s most important rivers are suffering from overuse and pollution.

October 21, 2024 - Politico

Large metal pipe discharging water or wastewater into creek or body of water with shrubs and field in background.

Supreme Court Could Curb EPA’s Water Quality Regulation Powers

A suit brought by the city of San Francisco argues that the agency’s language around water treatment and discharge is too vague and imposes retroactive penalties.

October 20, 2024 - Roll Call

Close-up of lead water pipe with mineral crusts

President Sets New Deadline for Replacing Lead Pipes

U.S. cities are charged with replacing dangerous lead pipes and improving drinking water quality within the next 13 years.

October 9, 2024 - Associated Press

Aerial view of fracking equipment in desert-type plain at golden hour.

Study: Fracking Chemical Disclosures Prompt More Cautious Behavior

Because toxic chemicals used in fracking can contaminate local water supplies, residents in states that require companies to disclose their materials are more likely to increase their bottled water consumption.

October 3, 2024 - Chicago Booth Review

View of calm Maumee River with fall foliage on other side at sunset.

Great Lakes Water Quality Project Seeks to Restore Coastal Vegetation

A plan to restore perennial plants to agricultural land could help reduce runoff and improve water quality across the Great Lakes region.

October 2, 2024 - Midland Daily News

Close-up of hand in white surgical glove holding up clear vial with water sample with lake surrounded by green trees in background.

Study: Lakes Near Communities of Color Less Inspected for Water Quality

The research is the first of its kind to analyze the relationship between freshwater monitoring and the race and ethnicity of nearby communities.

September 11, 2024 - MSU Today

Aerial view of large barns and a massive manure lagoon.

Michigan Court Green-Lights State Regulation of Livestock Manure

A recent court decision has granted Michigan regulators full authority to hold animal agriculture accountable for manure runoff into waterways.

August 28, 2024 - Great Lakes Now

Aerial view of Baltimore's Inner Harbor with downtown skyline.

Baltimore Invests Billions to Clean its Waterways

Like Paris, the city has been working to improve its wastewater system and make local waterways safe for swimming.

August 13, 2024 - NPR

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.

Professor of Urban Planning

Harvard University Graduate School of Design

Transportation Planner I

KFH Group Inc.

Director, Strategy and Research

Greater Baltimore Committee

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100 Most Influential Urbanists

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Urban Planning Creators You Should Know

A short list of voices on social, video, and podcasting platforms.