Congress unanimously voted to reverse an EPA ruling on fire hydrants that could save the city millions of dollars.
The vote amends the Reduction of Lead in Drinking Water Act, passed in 2011.
The bill places new lead-free requirements on drinking water systems that should protect people from lead poisoning.
But a stipulation that it should apply to fire hydrants would have required the city to throw out 1,300 working fire hydrants.
Senator Chuck Schumer and other officials called for the reversal earlier this year, saying that people don't usually drink from fire hydrants.