WASHINGTON  The Environmental Protection Agency is 10 years behind schedule in setting guidelines for a host of toxic air pollutants, according to a report from the agency’s inspector general.

The report, which was released last week, found that the agency had failed to develop emissions standards, due in 2000, for some sources of hazardous air pollutants. These included smaller sites often located in urban areas, like dry cleaners and gas stations, but also some chemical manufacturers.

The inspector general also found that the agency had not met targets outlined in a 1999 planning document, the Integrated Urban Air Toxics Strategy, including tracking urban dwellers’ risk of developing health problems from exposure to pollutants.

Some experts said the failures were persisting largely because the E.P.A.’s Office of Air and Radiation, which is responsible for regulating air pollutants, lacked the money needed to meet its deadlines.