Rationing is a very blunt instrument. What works is setting a price for water usage that lets supply and demand meet at a sustainable level. This would requir

Rationing is a very blunt instrument. What works is setting a price for water usage that lets supply and demand meet at a sustainable level. This would require changing many laws and regulations, which is probably very hard to accomplish because the powerful interests that benefit from the current system. Nonetheless, that is the solution to strive for.