Subsidized household rainwater harvesting for water-poor neighborhoods
#00200
City-subsidized roof-harvesting kits (first-flush separator, cistern, filters) designed for informal housing and installed with NGO and local-installer training, supplying 5-8 months per year of non-potable and filtered water in suitable climates.
Mexico City, Mexico
SuccessSEDEMA (Mexico City environment ministry) with Isla Urbana and local installers · since 2019 · City
The Cosecha de Lluvia program, run by SEDEMA (Mexico City's environment ministry), scaled the citizen-designed Isla Urbana kit (Tlaloque first-flush separator, cistern, and filters) with public subsidy: approximately 62…
Subsidized systems installed 2019-2023~62,700systems
Program cost per system~1,100USD
$70M · Mexico City government subsidy, ~US$70M over 2019-2023 · 1 source