Ontario, CA Landscaping Rules: Rainwater Harvesting (2026)

AB-1750 Rainwater Capture Act of 2012. An act to amend Section 7027.5 of the Business and Professions Code, and to add Part 2.4 (commencing with Section 10570) to Division 6 of the Water Code, relating to water. This bill would enact the Rainwater Capture Act of 2012, which would provide that use of rainwater collected from rooftops does not require a water right permit from the state board. PART 2.4. Rainwater Capture Act of 2012. 10570. This part shall be known, and may be cited, as the Rainwater Capture Act of 2012. 10573. Solely for the purposes of this part, and unless the context otherwise requires, the following definitions govern the construction of this part: (a) "Developed or developing lands" means lands that have one or more of the characteristics described in subparagraphs (A) to (C), inclusive, of paragraph (4) of subdivision (b) of Section 56375.3 of the Government Code. (b) "Rain barrel system" is a type of rainwater capture system that does not use electricity or a water pump and is not connected to or reliant on a potable water system. (c) "Rainwater" means precipitation on any public or private parcel that has not entered an offsite storm drain system or channel, a flood control channel, or any other stream channel, and has not previously been put to beneficial use. (d) "Rainwater capture system" means a facility designed to capture, retain, and store rainwater flowing off a building rooftop for subsequent onsite use. 10574. Use of rainwater collected from rooftops does not require a water right permit pursuant to Section 1201.