Mendham Flushing May Cause Water Disruptions (See Schedule)

MENDHAM, NJ — Spring cleaning has arrived for New Jersey American Water, and Mendham Borough is one of the towns set for the utility company's annual water main flushing this year.

The utility provider announced that it has kicked off its 2025 flushing schedule, with work lasting until the fall.

In Mendham, flushing is scheduled to last through the end of the week, officials said.

So, what exactly is water main flushing?

According to New Jersey American Water, it’s the process of opening fire hydrants in specific areas to temporarily increase water flow through the system. This helps clear out sediment and maintain water quality. The routine also includes flushing blowoff valves on dead-end mains to ensure the entire network stays clean and efficient.

Residents may notice temporary water discoloration or a drop in water pressure during the flushing process, according to the utility provider.

If customers experience temporary water discoloration, New Jersey American Water recommends running the cold water until it is clear.

The following steps are also encouraged:

• Draw water for cooking prior to the flushing period.
• Store a large pitcher of water in the refrigerator for drinking.
• Check for discolored water before using the washing machine or dishwasher.
• If water pressure or water volume seems low after flushing has been completed, check faucet screens for trapped particles.

Flushing takes place between 7:30 a.m. and 4 p.m. each day.

“Flushing our system is an important, routine process that helps us clean out any mineral deposits or sediment that may have built up over time inside the pipes,” said New Jersey American Water Vice President of Operations, Ben Morris. “While we’re flushing, we also take the opportunity to check our water pressure and fire flows in the system and confirm our hydrants are operational.”