| R2-2018-0019 | Order No. R2-2018-0019 Waste Discharge Requirements for Eden Shores Associates, I LLC, Eden Shores Residential Project | Permit | Alameda County | May | 2018 |
| R2-2018-0020 | Order No. R2-2018-0020 U.S. Fish and Wildlife Service and the California Department of Fish and Wildlife, South Bay Salt Pond Restoration Project Phase 2 | Permit | Various | May | 2018 |
| R2-2018-0024 | Order No. R2-2018-0024 Reissuance of Waste Discharge Requirements for City of Burlingame and North Bayside System Unit, City of Burlingame Wastewater Treatment Facility and Collection System | Permit | San Mateo County | June | 2018 |
| R2-2018-0027 | Order No. R2-2018-0027 Proposed Amendment to the Basin Plan to Establish a TMDL for Sediment in the Pescadero-Butano Watershed and an Implementation Plan to Achieve the TMDL and Habitat Enhancement Goals | Resolution | San Mateo County | June | 2018 |
| R2-2018-0028 | Order No. R2-2018-0028 Waste Discharge Requirements for Hanson Permanente Cement, Inc., and Lehigh Southwest Cement Company - Permanente Quarry and Cement Plant | Permit | Santa Clara County | June | 2018 |
| R2-2018-0026 | Order No. R2-2018-0026 General Waste Discharge Requirements for Discharge or Reclamation of Extracted Brackish Groundwater, Reverse Osmosis Concentrate Resulting from Treated Brackish Groundwater, and Extracted Groundwater from Structural Dewatering Requiring Treatment to Surface Waters | Permit | Various | June | 2018 |
| R2-2018-1006 | Order No. R2-2018-1006 Settlement Agreement and Stipulation for Entry of Administrative Civil Liability for Dublin San Ramon Services District | Enforcement | Alameda County | July | 2018 |
| R2-2018-0038 | Order No. R2-2018-0038 Waste Discharge Requirements for Sanitary District No. 5 of Marin County, Sanitary District No. 5 Wastewater Treatment Plant and its Collection System | Permit | Marin County | August | 2018 |
| R2-2018-0039 | Order No. R2-2018-0039 Waste Discharge Requirements for Sewerage Agency of Southern Marin, Sewerage Agency of Southern Marin Wastewater Treatment Plant and its Wastewater Collection and Conveyance System | Permit | Marin County | August | 2018 |
| R2-2018-1008 | Order No. R2-2018-1008 Acceptance of Conditional Resolution and Waiver of Right to Hearing for Schnitzer Steel Products | Enforcement | Alameda County | August | 2018 |
