From arsenic to E. coli bacteria, contaminants flow from the water taps of hundreds of communities across the state. But seven bills signed into law Friday by Gov. Jerry Brown seek to improve access to clean drinking water in California, particularly for residents in rural and disadvantaged... + read more

Water quality regulators in the Central Valley and Central Coast regions are weeks away from voting on the first comprehensive requirements governing groundwater quality under farms. Farmers are balking at the rules, but environmental groups say they aren't nearly strong enough to protect... + read more

Millions of Californians have been exposed to harmful levels of nitrates in their water over the past 15 years. Many rely on private wells that have no public health oversight, while cities have spent millions on water treatment plants. + read more

California Watch reporters spent more than a year analyzing nitrate contamination. Read about the reporting and testing process. + read more