3 ms·Many golf courses in arid regions are on greywater.by kjkjadksj 1y agoMany golf courses in arid regions are on greywater.adrr 1y agoThat could be used as potable water again. Orange county,CA injects treated waste water back into the aquifer then pumps back out for water. https://www.ocwd.com/gwrs https://www.ocwd.com/gwrskjkjadksj 1y agoOrange county CA also irrigates its golf courses with its greywater.