Adding a separate salt water supply infrastructure would be expensive. Salt water is also quite corrosive; pipes, fittings and fixtures would have to be designed/tested for such use. Besides, having my clothes, dishes and body perpetually crusted in salt is not appealing.
You'd be better off subsidizing grey water systems. Or better yet, focusing on larger scale inefficiencies in agriculture. Or push for market-pricing so individuals/businesses have incentive to pursue efficiencies.
You'd be better off subsidizing grey water systems. Or better yet, focusing on larger scale inefficiencies in agriculture. Or push for market-pricing so individuals/businesses have incentive to pursue efficiencies.