Officials attributed the spike to road salt, discharge from wastewater treatment plants and home water softener systems.

The suburban reservoirs that supply 10% of New York City's vaunted drinking water are getting saltier due to decades of road salt being spread near the system — and they will eventually have to be abandoned if nothing is done to reverse the trend, city officials warn.

New York City’s drinking water is becoming saltier, according to a new report from the Department of Environmental Protection. Officials are raising concerns about long-term impacts on infrastructure,