Some residents in Central Jersey are waking up to changes in their water including taste and odor. New Jersey American Water is investigating and sampling the system.

Overnight crews flushed out hydrants to help clear the system, which may have resulted in low pressure of discolored water.

If your water is discolored they say run the cold water taps only, at the lowest level of your home for about 3 to 5 minutes until water runs clear.

The areas under this emergency alert are all part of New Jersey American Water's Raritan System in parts of Middlesex, Somerset and Union counties.

Hillsborough Township recommends residents use bottled water until more information is available.

New Jersey American Water says they are working on a solution and will provide an update once available.

Town impacted include:

Belle Mead, Berkeley Heights, Bound Brook, Bridgewater, Branchburg, Chester, Clark, Cranbury, Cranford, Dunellen, Edison, Fanwood, Far Hills, Flagtown, Flemington, Franklin Township, Garwood, Gladstone, Green Brook, Hightstown, Hillsborough, Hillside, Hopewell Borough, Hopewell Township, Jamesburg, Kenilworth, Kingston, Lawrence, Linden, Manville, Martinsville, Middlesex, Millstone, Monroe Township, Montgomery, Mountainside, Neshanic Station, New Providence, North Plainfield, Peapack, Piscataway, Plainfield, Plainsboro, Pottersville, Princeton, Princeton Junction, Raritan Borough, Raritan Township, Readington, Roselle, Roselle Park, Scotch Plains, Somerset, Somerville, South Brunswick, South Plainfield, South Bound Brook, Tewksbury, Three Bridges, Union, Vauxhall, Warren, Watchung, West Windsor, Westfield, Whitehouse and Whitehouse Station.