Decentralized rainwater harvesting

Decentralized or distributed rainwater harvesting (DRH) systems offer a means of both supplementing strained water sources in times of drought and reducing pumping demand during times of flood. DRH provided up to half of a family's needed water in the study area in Mexico City, Mexico and can support adaptation to decreased water supply. Although these systems cannot supply the entirety of a family’s annual water demand, one system can supply, on average, about one-half of a family’s water needs.

Climate Related Risk

Changes in precipitation, Change in water quantity, Change in water quantity table, Drought

Form of Option


Country of Origin



Households, Municipality/urban area


The option has been identified and implemented with indication that it will continue beyond the context of the project.

Institution / Legal Reach

Change in norms or ways of doing things