Threats to Safe Drinking Water In California

photo: Duplass,

Drinking water is protected at the federal level by the Safe Drinking Water Act, which provides guidance to the Environmental Protection Agency on how they can and should regulate contaminants found in our drinking water supplies.

California has its own Safe Drinking Water Act, which implements the federal statute and expands some of its provisions.

But what does this really mean? What chemicals are found in our water supply? Is everyone’s water supply protected?

And, is there something each of us can and should do to protect our families and our fellow California residents?

Learn more about all of these issues below.


The exploding use of pesticides and synthetic fertilizer after World War II created an agricultural boom, but have left a legacy of contamination. Learn more here.

Hexavalent Chromium

The movie Erin Brockovich alerted the public to the great suffering the little town of Hinkley experienced due to hexavalent chromium in their drinking water. Sadly, Hinkley is not the only California community suffering from this devastating pollution. Learn more here.

1,2,3- Trichloropropane (TCP)

1,2,3- Trichloropropane (TCP) was an inactive ingredient in two commonly used fumigants. Althought its use has been banned for more than two decades, it continues to pollute groundwater throughout the state. Learn more here.


California has the most known drinking water sources contaminated by perchlorate in the country. Learn more here.