Or just make agriculture desalinate their own water on their own dime and let the people continue drinking the ground/river water. It's not like you should be

Or just make agriculture desalinate their own water on their own dime and let the people continue drinking the ground/river water. It's not like you should be irrigating fields with that mineral-heavy water anyways, isn't it slowly salting the land? If agriculture had to foot the bill for their desalination needs they would become more efficient automatically.