The EPA plans to effectively remove from the market all over-the-counter products containing chlorpyrifos, one of the most commonly used pesticides in the U.S., often sold under the brand name Dursban. The pesticide, made by Dow Chemical, is contained in some 800 consumer products, everything from lawn spray to flea collars. The EPA is expected to make its announcement on June 8, arguing that the pesticide may be more dangerous to people than previously believed. Several enviro and public-health groups have campaigned vigorously for strict limits on chlorpyrifos, noting that it has been linked to nervous system disorders and other health problems. The EPA still plans to allow limited agricultural use of the pesticide.