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The Boston Globe

Metro

3,300 gas leaks are found in Boston

Most are small; perspectives differ on risk

Natural gas is escaping from more than 3,300 leaks in ­Boston’s underground pipelines, according to a new ­Boston University study that underscores the explosion risk and environmental damage from aging infrastructure ­under city sidewalks and streets.

The vast majority of the leaks are tiny, ­although six locations had gas levels higher than the threshold at which explosions could ­occur. Although there have been no reports of explosions in ­Boston from any of the leaks, the study comes three years ­after a Gloucester house ­exploded probably because of a cracked and corroded gas main dating to 1911.

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