water imported from northern california, the sierra nevada mountains, and the colorado river basin, these storm water capture programs aren't nearly enough to meet demand. the plan in progress is for 70% of l.a.'s water to be locally sourced by 2035. >> one of our major focuses is on recycled water. this is a goal the city of los angeles has the recycle 100% of all the waste water we have, and that will help us provide a local source of water that is sustainable and consistent. >> reporter: where is that water coming from? >> it is coming through the waste water collection system across our whole network. 6,500 miles of sewer. >> reporter: yeah. waste water. but it gets treated a lot. >> advance treated, very high purity water, better than distilled water, and then supply it for a source of ground water infiltration. >> reporter: other projects look to beautify while capturing storm water for irrigation in