The federal government makes sure everyone who sends a venmo for $60 pays taxes on it so yeah I think securing our national infrastructure is not an unreasonable expectation.
There's no "national infrastructure" for water. Aside from what the EPA does, it isn't within the remit of the federal government to manage municipality water systems.
My wording was ambiguous. “national infrastructure” can refer to either the infrastructure in our nation or infrastructure managed by the federal government. I meant the former.