He said the decision to resign was made when the house he bought was in escrow.
"It's a good and bad time," he said. "It's an excellent time for the city with a new city manager."
Mazeroll said he had decided not to run for a third term prior to his resignation.
"Two terms is long enough," he said.
He noted he has no interest in running for any other political office.
"I didn't use the City Council for my own aspirations or as a stepping stone," explained Mazeroll, an Imperial businessman who owns Valley Propane.
Mazeroll's resignation came as a surprise to other city officials.
"I was surprised and disappointed that he was leaving," said Mayor Mark Gran.
"We worked well together, and I have a lot of respect for him."
He added, "I'm sorry to see him go."
Mazeroll served as the head of the council committees for sanitation, non-police personnel, the library and parks and recreation.
Gran said the city will be accepting letters of interest from people seeking Mazeroll's seat.
"Then we will appoint someone to take up the balance of time," said Gran.
He added the person appointed will automatically take on the responsibilities Mazeroll had as committee head.
"For the most part, most of these can be filled by the incoming person," said Gran of Mazeroll's committees.
Mazeroll's unexpired term runs until the next general election in November 2002.
Letters of interest should be addressed to Mayor Mark Gran at the City of Imperial, 420 S. Imperial Ave., Imperial, CA 92251.
Staff Writer Laura MacKenzie can be reached at 337-3442.