Environmental chemistry methods (ECM) are analytical methods for residues in an environmental medium, which is typically soil or water. ECMs identify and quantify pesticide analytes of interest, which may include transformation products.

The ECM reports listed in the ECM Index were submitted to EPA by pesticide registrants in order to support submitted field and monitoring studies, potential monitoring by states, tribes, and other entities, or both. We collect and post these ECM reports and associated Independent Laboratory Validation (ILV) reports and EPA reviews (i.e., data evaluation records or DERs) to the ECM Index. Analytical methods submitted to EPA to support human health studies are not posted to the ECM Index, even though they may analyze a medium common to ECMs (e.g., plants).

EPA makes no claim of validity by posting these ECMs, but recognizes that they may be of some utility to state, tribal, and local authorities. Not all ECMs listed are independently validated or reviewed by EPA.

Access the Environmental Chemistry Methods Index.