What About Rainwater Catchment?
While the Department of Water Supply (DWS) does not recognize nor regulate Rainwater Catchment, there are many residents beyond the scope of the public water system that rely on it. For those interested in Rainwater Catchment, the following university, government, and nonprofit partnership sites may contain useful information. DWS does not endorse or accept responsibility for the contents or recommendations of the organizations listed below:
Sea Grant University of Hawaiʻi: www.hawaiirain.org
State of Hawaii Department of Health Safe Drinking Water Branch: http://health.hawaii.gov/sdwb/raincatchment/
The American Rainwater Catchment Systems Association: https://www.arcsa.org/default.aspx