Aren’t phosphates a critical component of fertilizer? I’d think that’d be a far larger source of runoff than dishwashers.
If you want zero effort spotless dishes, just mix STPP in a 1:4 ratio with cheap powdered detergent.
https://www.amazon.com/Sodium-Tripolyphosphate-Super-Cleans-...
If we really want to solve these problems and not just feel good about ourselves we should have a different set of policies.