Christie Whitman, when she led the Environmental Protection Agency, made "misleading statements of safety" about the air quality near the World Trade Center in the days after the Sept. 11 attack and may have put the public in danger, a federal judge found yesterday.

The pointed criticism of Mrs. Whitman came in a ruling by the judge, Deborah A. Batts of Federal District Court in Manhattan, in a 2004 class action lawsuit on behalf of residents and schoolchildren from downtown Manhattan and Brooklyn who say they were exposed to air contamination inside buildings near the trade center.

The suit, against Mrs. Whitman, other former and current E.P.A. officials and the agency itself, charges that they failed to warn people of dangerous materials in the air and then failed to carry out an adequate cleanup. The plaintiffs are seeking monetary damages and want the judge to order a thorough cleaning.

In her ruling, Judge Batts decided not to dismiss the case against Mrs. Whitman, who is being sued both as former administrator of the E.P.A. and as an individual.