Hundreds of Environmental Protection Agency scientists complain they have been victims of political interference and pressure from superiors to skew their findings. The Union of Concerned Scientists said that more than half of the nearly 1,600 EPA staff scientists who responded online to a detailed questionnaire reported they had experienced incidents of political interference in their work. Francesca Grifo, director of the Union of Concerned Scientists' Scientific Integrity Program, said the survey results revealed "an agency in crisis" with low morale, especially among scientists involved in risk assessment and crafting regulations. "The investigation shows researchers are generally continuing to do their work, but their scientific findings are tossed aside when it comes time to write regulations," said Grifo. The group sent an online questionnaire to 5,500 EPA scientists and received 1,586 responses, a majority of them senior scientists who have worked for the agency for 10 years or more. The survey included chemists, toxicologists, engineers, geologists and experts in the life and environmental sciences. The report said that 60 percent of those responding, or 889 scientists, reported personally experiencing what they viewed as political interference in their work over the last five years. Senior managers and the White House Office of Management and Budget frequently second-guess scientific findings and change work conducted by EPA's scientists, the report said. Nearly 400 scientists said they had witnessed EPA officials misrepresenting scientific findings, 284 said they had [witnessed] the "selective or incomplete use of data to justify a specific regulatory outcome" and 224 scientists said they had been directed to "inappropriately exclude or alter technical information" in an EPA document.