1. n. [Drilling Fluids]

Abbreviation for Environmental Protection Agency, a branch of the US government that administers laws passed by the US Congress on environmental matters.

See: bioassay,  CERCLA,  emulsion mud,  heavy metal,  HSE,  Minerals Management Service,  mysid shrimp,  NPDES,  OOC,  potassium mud,  sheen test,  synthetic-base fluid,  synthetic-base mud