Interesting you say "problem"; those orgs are looking for the best welfare of fetal cats and humans (yes, diseases from cats and garbage they rummage thru).

Cats running around on city streets is not what is best.

No, cats don't real keep rat populations down.

There are million dollar-plus non-profits who work to find feral cats abd have them adopted and DC does help.

DC WASA essentially wild ass guesses your water consumption and seen that neighbors and my bills as well as comments on this sub, listservs, etc.

Mostly around $50-100.