From the environmental activist, consumer advocate, and renowned crusader—a stirring call to action that gives us the tools we need to take action ourselves, to make our voices heard, to ensure our water is safe, and to finally bring about change.

Clean water is as basic to life on planet Earth as hydrogen or oxygen. In her long-awaited book—her first to reckon with the condition of water on our planet—Erin Brockovich shows us what’s at stake. She writes powerfully of the fraudulent science disguising our national water crisis: Cancer clusters are not being reported. People in Detroit and the state of New Jersey don’t have clean water. The drinking water for more than six million Americans contains unsafe levels of industrial chemicals linked to cancer and other health issues. The saga of PG&E continues to this day. Yet communities and people around the country are fighting to make an impact, and Brockovich tells us their stories.

In Poughkeepsie, New York, a water operator responded to his customers’ concerns and changed his system to create some of the safest water in the country. Local moms in Hannibal, Missouri, became the first citizens in the nation to file an ordinance prohibiting the use of ammonia in their public drinking water. Like them, we can each protect our right to clean water by fighting for better enforcement of laws, new legislation, and stronger regulations.