Low-flying black helicopters over Wilton are not a cause for concern.
Eversource announced last week it will be conducting aerial inspections of high voltage electrical equipment on rights-of-way.
The work involves the use of low-flying helicopters equipped with high-resolution cameras, which can detect potential equipment issues before they occur, according to Eversource.
The inspections began Sept. 21 in Fairfield County and are expected to take up to three weeks to complete.
Weather-permitting, the inspection will take place between the hours of 7 a.m. and 5 p.m. using two black MD500 helicopters with registration numbers N371EE and N500LK.
Overhead inspections of transmission lines and equipment — often located upwards of 100 feet in the air — help engineers detect potential problems in advance, allowing the company to schedule necessary maintenance and upgrades before reliability issues arise, said Mitch Gross, spokesman for the company.