The brain-harming metal is discharged directly into the river or carried to it on air currents. Some argue authorities are doing too little to stop both routes of pollution.
The Environmental Integrity Project says about a million more pounds of nitrogen pollution are getting into the bay. Half of Pa. land drains into the Chesapeake.
Pa.'s climate assessment predicts chicken farms will move to Pennsylvania to escape sweltering temperatures in the South, causing more water pollution.
Pennsylvania’s one million private wells are not regulated. A new investigation in Lancaster shows 62% of wells sampled found bacteria or high nitrate levels.
With their well water contaminated, a West Virginia family is desperate to get connected to a clean water supply. They blame pollution from years of coal and gas extraction.
The landfill was sending liquid waste to a local sewage treatment plant, causing it to release contaminants including radium into the Monongahela River.
Twenty locations along the river including Pa. will be sampled for this group of "forever chemicals" associated with reproductive problems, liver, kidney and thyroid disease, and cancer.
This interstate organization was started in 1948 to clean up the Ohio River. In some areas, it accomplished its mission. But in others, there's a lot to be done.
The Kinzua Dam, which protects Pittsburgh from flooding and pollution, took thousands of acres of the Seneca's territory and destroyed nine communities. We look at the past and future of the Seneca Nation.
Freshwater Accountability Project will collect air and water quality data near schools, and daycare and senior centers close to the site in Belmont County.
