The county Department of Water Supply is asking all customers in Waikapu, Kehalani Mauka (above Honoapiilani Highway) and Upper Wailuku Heights to immediately halt all unnecessary water use until further notice as the department faces potential water outages in those areas, according to a news release Saturday afternoon.

The department’s Waikapu/Wailuku water tanks are being depleted due to “very high consumption” of water by users and the temporary loss of Waikapu’s well due to mechanical and electrical issues. Immediate reduced water usage by customers may prevent service interruptions, the release said.

Tanker trucks carrying potable water were deployed to Wailuku Heights Park (off South Alu Drive) and Hookahewai Street for use by Wailuku/Waikapu area customers in the event of a service interruption.

To help curb water usage and avoid potential service interruptions, the department advises the following:

• Do not water your lawn or irrigate ground cover.

• If you need to wash the car, go to the car wash (most car washes on Maui are fitted with recirculating water).

• Check in and around homes for leaks.

For questions, call the 24-hour hotline at 270-7633.