Columbia Gas of Maryland and the State of Maryland also reported having no problems with the transition from 1999 to 2000.
Some had feared the change would cause computer systems to malfunction if they interpreted the date to be 1900.
The possibility for a problem was caused by early computer programmers who, in an effort to save space, identified years using only the last two digits.
There is still some concern the Y2K bug may surface as smaller businesses open in the new year. But several Hagerstown businesses also reported no problems with Y2K on Saturday.
"We didn't even notice it," said Ed Grimes, a clerk at the AC&T gas station on Wesel Boulevard in Hagerstown.
"This is only another day," said Potomac General Store owner Gladstone Kelly, who was working at his downtown Hagerstown store Saturday.
"I think it was just a scare. ... The government is so far advanced," said Bob Blackburn at Rocky's New York Pizza also in downtown Hagerstown.
Toni Wibberley, 20, of Hagerstown, said she was never really worried.
"I didn't think anything would happen, plus they tested everything," she said. "Everything's the same. It's another day."
A check of businesses, government offices and police agencies in the Eastern Panhandle of West Virginia also revealed no Y2K problems.
There was a brief power outage at the Berkeley County Office of Emergency Services office on South Queen Street about 9 a.m. Saturday, said director Steve Allen.
The power was disrupted for only a few seconds, said Allen.
Allen said he was not sure what caused the disruption.
A generator that is designed to provide power to the office during interruptions came on, Allen said.
Otherwise, there were no problems, Allen said.
"It was a fairly noneventful day and night," Allen said.
A check of grocery stores, gas stations and motels also revealed no problems.