The analysis showed 24 unexplained fires since January in a cluster around Arthur St, lower Mornington, Serpentine Ave and Princes St.
Two of four suspicious fires set in the past week were in the area.
However, police said yesterday there were no patterns to the fires, which they believed were probably coincidental.
However, the policeman in charge of the arson investigations, Detective Sergeant Brett Roberts, said the Fire Service figures did raise some concerns, particularly about the Maclaggan St area, where there had been two skip fires and one other rubbish fire in the past few months.
"We are concerned that there might be someone down there who enjoys seeing the Fire Service turn up."
Southern region fire safety officer Barry Gibson said other than that almost all the fires were in rubbish or combustible material left lying in the street, no obvious patterns were emerging yet.
But he and the police were taking a harder look at the fires.
He had not done the same analysis for other parts of the city, but his gut feeling was that the number of unexplained fires in this localised area was higher.
There would always be someone who would want to set fire to a pile of rubbish and the Fire Service's main concern was that people restricted opportunities for that to happen, he said.
Skips should be kept locked, in locked areas, in the open and clear of buildings, as should wheelie bins and jumbo bins, which should not be placed out for collection until the last possible moment.
Det Sgt Roberts said police had a few leads on the fires over the past week, but nothing substantive.
The latest fire to be treated as suspicious was one in the bedroom of a Corstorphine house on Tuesday night.
The occupant was at work when the fire started at 8.40.
The house was secure and there were no wiring issues that might have started it.
He would like to speak to anyone who saw any suspicious activity in the Middleton Rd area about that time.
He was also dismayed by a report from a neighbour that their wallet was stolen from their home, and money taken from it, while people gathered to watch the fire.
Anyone with information about the fires or the theft is asked to contact the Dunedin police station on 471-4800.
