i feel him still. oh, no. you didn t do anything wrong. he just spit it up. i have the hook. he spit it up. reporter: the one that got away. in the rainy season, the l.a. river is made by storm trains and snow melt. but in the long dry season, the source is recycled waste water. michael ruiz is the chief plant operator. reporter: is it safe to say, this is the help for critical infrastructure? yes. reporter: this is cool. this is a 24/7 operation. reporter: always here. always someone here. reporter: 800,000 residents are flushing their toilet, taking a shower, et cetera. that water, 25 million gallons of that water is here every day. all that is recycled into lakes, the l.a. river.
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