Earlier quoted context omitted.
If it comes to it, cops, 311 and probably other means are available. It's possible to enforce and court is not needed.
It's hard enough to get the cops to come out to a robbery - I know of nowhere in America where they're bored enough to come look at someone with poor landscaping. Unless you're a decamillionaire (or a cop), the cops in America don't care about you.
FWIW, I'd love to know how they're monitoring everyone's pools.