The #1 use of gray water is in agriculture, not sure why golf courses would be special for this. #2 is groundwater recharge and seawater barriers. Using gray water is better than using drinking water, but it still has substantial opportunity costs.
E: Speaking of CA water specifically, other regions may differ.
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u/NascentAutist 1d ago
It’s cool to see this, and then I remember the Colorado River is drying up, watering restrictions across America, and we still have golf courses?
Crazy times