The Environmental Protection Agency (EPA) is finalizing certain revisions to the National Pollutant Discharge Elimination System permitting regulations proposed on May 18, 2016. The final regulatory changes are minor and will improve and clarify the regulations in the following major categories: Regulatory definitions ("new discharger" and two definitions related to the discharge of pesticides from pesticides application); permit applications; and public notice. This final rule also updates the EPA contact information and web addresses for electronic databases, updates outdated references to best management practices guidance documents, and deletes a provision relating to best practicable waste treatment technology for publicly owned treatment works that is no longer applicable. The final revisions modernize the NPDES regulations, promote submission of complete permit applications, and clarify regulatory requirements to allow more timely development of NPDES permits that protect human health and the environment.