In 1970, 20 million Americans participated in THIS day of action to demand clean air and water.

When too much nitrogen or phosphorous flow into our waters, THIS condition can result, where there is so little oxygen in the water that few fish or aquatic life can survive

This Michigan city suffered catastrophic lead contamination of its water over the past two years

This percentage of watersheds in the Western U.S. are contaminated by mining pollution.

When a wastewater treatment plant is overwhelmed by stormwater, THIS yucky thing can happen.

The Clean Water Act set a goal of having all our waterways clean by THIS year.

The algal blooms in Florida’s rivers last summer were so green and thick that people compared them to THIS classic Mexican dish

Treated drinking water in Flint is very corrosive for this reason.

This is the type of pollution that flowed from the Gold King mine in Colorado.

While in nature stormwater percolates down into the soil, THESE types of surfaces funnel stormwater into nearby waterways or our sewage systems.

If polluters violate their permits, and government fails to act, the Clean Water Act allows ordinary citizens to do THIS.

This company reported dumping more pounds of toxic pollution into our waterways than Dow, or Exxon or Koch Industries.

Intended to keep our drinking water safe, rules under this federal law set limits on lead and other contaminants

This is the estimated number of pipeline spills each year that cause “significant” damage to lives or property.

An acre of wetlands can hold up to THIS many gallons of stormwater.

The Clean Water Act requires states to set standards for water quality, such as suitable for fishing, swimming or drinking, known as THIS.

Name a city where pollution from factory farms has contaminated drinking water sources.

This many community water systems in the US still use lead pipes.

This many miles of streams and headwaters that provide drinking water for millions of Americans have been permanently buried and destroyed as the result of mountain top removal.

These residential development strategies can reduce runoff pollution.

Besides permits, THIS is one of the CWA’s many tools to protect our waterways from pollution.

Name one practice that can reduce pollution from agriculture.

Even before the crisis in Flint, Michigan, THIS Midwestern city replaced its lead service lines.

This is one way that fracking can create water pollution.

This kind of sewer system can overflow and threaten waterways with sewage pollution.