Surely knowingly letting people drink lead contaminated water breaks other laws rather than their constitutional rights?

Is suing the government not essentially a petition for remedies? How else do you get the gov to listen?

https://en.wikipedia.org/wiki/Town_of_Castle_Rock_v._Gonzale...

> the Court ruled, 7–2, that a town and its police department could not be sued under 42 U.S.C. § 1983 for refusing to enforce a restraining order, even though the refusal led to the murders of a woman's three children by her estranged husband