EPA Region 6 issued an Administrative Complaint (APO) under its authority pursuant to Section 309 of the Clean Water Act (CWA) to Diamond 3S, LLC (Respondent), located in Pawhuska, Osage County, Oklahoma. The APO was issued in response to violation of Section 301 of the CWA for discharging produced water to waters of the U.S. The The Default Order requires that Respondent pay a penalty of $64,500 within 30 days of the Default Order becoming final. Respondent has 45 days to appeal the Default Order after receipt.