Chlormequat use in oat production has prompted two class action lawsuits in California against General Mills and Quaker Oats.

Chlormequat found in oat foods prompts U.S. lawsuits
Class action suits rely on Environmental Working Group scientists who claim much lower safe limit than EPA

Oat millers recommend not using Manipulator
Farmers advised the juice may not be worth the squeeze on heels of contamination report
Oat millers in Canada are telling growers that a plant growth regulator isn't effective on oats, so farmers probably don't need to use it.

Oat producers call chlormequat report fear mongering
Environmental Working Group blames Canadian producers for residues of plant growth regulator found in oat products
The Prairie Oat Growers Association is pushing back against allegations that Canadian oats are contaminated with chemicals from a plant growth regulator.

Canadian farmers blamed for ag chemical in U.S. oat foods
Discovery sets off media story despite samples testing well inside safe levels
A U.S. environmental group is pointing a finger at Canadian oat growers, saying they’re the cause of ag chemical residues found in Cheerios and Quaker Oats.