Salt

Yellow truck dropping salt onto a snowy road.

Road Salt has Increased Chloride Levels in the Potomac by 85%

A common winter road clearing technique is having major impacts on waterways.

March 15, 2026 - Greater Greater Washington

CLose-up of road salt sprinkled on roadway in winter.

Inside the Initiative to Protect Lake George by Reducing Road Salt

Ten years after launching a plan to cut salt pollution, Lake George is seeing results, and the model is spreading across the country and beyond.

January 5, 2026 - Madeline de Figueiredo

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

Low close-up of salt sprinkled on asphalt road in winter with person walking and car in background.

Minnesota Advocates Propose Tools to Limit Road Salt Use

Winter-oriented road design can limit the amount of polluting chloride used on the state’s roads to mitigate winter conditions.

February 5, 2024 - MPR News

Bighorn Sheep

The 'Wide-Ranging Ecological Downside' of Road Salt

A study from the USGS using five decades of data shows salinity and alkalinity are up in waterways across the United States.

January 17, 2018 - Pittsburgh Post-Gazette

Bighorn Sheep

Road Salt Contaminating Fresh Water Lakes Around North America

According to scientists, increasingly salty lakes pose health risks not just to their fish and plant life but to the people who drink their water.

April 14, 2017 - The Washington Post

New Non-Salt Strategies for Snowy Cities

Winter brings snowy conditions to roads in many cities, and many react with snow-melting salt solutions. But the physical and environmental damage of salt is leading some to look for other means of fighting the freeze.

January 14, 2010 - NRDC

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.

Top Books

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The definitive ranking of graduate planning programs.

100 Most Influential Urbanists

The who's who of urbanism, according to Planetizen readers.

Urban Planning Creators You Should Know

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