This map gives federal agencies key information on how rainwater is regulated across the U.S. to help them make strategic decisions on where to implement rainwater harvesting projects.

The manual serves as a primer on the basics of residential and small-scale commercial rainwater harvesting systems design.

Overview of potential pollutants in rainwater and different treatment options to remove the pollutants.

This guidance from the Environmental Health Standing Committee (enHealth) provides information on potential threats to water quality in rainwater tanks and how to avoid them.

A protocol that confirms rainwater catchment products do not impart contaminants into the water at levels that exceed U.S. EPA drinking water regulations or advisories.