New York, NY —

The Croton water treatment plant in the Bronx is overdue and running at double its original budget. That's according to audits by city comptroller Bill Thompson. Thompson, who's also running for mayor, says the public was misled about the costs of the project, now at $2 billion, more than double the original estimate.

THOMPSON: Most of this has been created by poor design up front. Movement and design changes as they moved throughout the project. Things not being done in expeditious fashion and really the lack of focus on a management level.

The city Department of Environmental Protection, which is overseeing the filtration plant's construction, says the delays were due in part with problems in awarding a construction contract.