https://waterkeeper.org/
Safe Drinking Water Act
Arsenic
Water Testing
nitrates in water
Water stats by Anne Nigra - https://annenigra.github.io/

Bay Area Spring Water

What causes water contamination in places like Sebastapol? Who is working to clean up the water in these counties?
Stinson Beach has Cadmium and coliform bacteria. See Bay Area Spring Water Why?

Local spring water delivery services. This one is for the North Bay. There's a market.

Uranium
Sociodemographic inequalities in uranium and other metals in community water systems across the USA, 2006–11: a cross-sectional study

Inequalities in Public Water Arsenic Concentrations in Counties and Community Water Systems across the United States, 2006–2011 - Anne Nigra, Columbia

Lead Pipes

Milwaukee's Radical Solution to America's Clean Water Crisis

Flint Water Crisis

Core issue: Flint switched from Detroit's treated Lake Heron water to Flint River water, which was more corrosive. The corrosive water leeched lead from pipes, causing widespread lead poisoning.

Normally cities use things like "corrosion inhibitors" to help this problem. These were not used.