Rainwater
https://greywateraction.org/
https://www.bernco.gov/public-works/wp-content/uploads/sites/76/2023/05/Passive-Rainwater-Harvesting-Guide_webLR.pdf
https://watershedmg.org/advocacy/build-a-basin
https://content.ces.ncsu.edu/rainwater-harvesting-guidance-for-homeowners
https://rainharvesting.com.au/the-12-steps-of-rain-harvesting/