Without an answer from EPA to its administrative petition from April 2009 requesting that it ends the use of TVCP, a dangerous pesticide in household pet products, NRDC filed a petition for writ of mandamus in Feb. 2014. In March 2014, EPA announced an agreement with Sergeant’s Pet Care Products, Inc. and Wellmark International to cancel the use of propoxur in flea collars due to risk posed to the brain and nervous systems of kids – but did not address related use of other dangerous chemicals, including TCVP. On Nov. 7, 2014, EPA denied NRDC’s 2009 petition seeking to cancel all pet uses of the toxic chemical TCVP because of the risks to kids. On April 22, 2020, the petition is granted. EPA is ordered to respond to the NRDC’s petition to ban the neurotoxic pesticide tetrachlorvinphos (TCVP) in household pet products within 90 days. EPA decided not to ban the pesticide. NRDC has challenged that decision. On Apr. 20, 2022, the court ruling agreed with NRDC that EPA’s risk analysis was inaccurate and is requiring that EPA publish a revised assessment in 120 days. On May 19, 2022 the EPA Office of Inspector General said it plans to determine whether the agency’s response “provides assurance that the collars can still be used without posing unreasonable adverse effects to human health and the environment” and whether the EPA adhered to pesticide registration requirements in approving the popular Seresto collar. And in October 2022, the EPA announced that it will ban the sale of flea and tick collars containing TCVP, a chemical linked to neurological damage in children, which make up more than half of flea and tick collars sold in the U.S.