| R2-2018-0010 | Order No. R2-2018-0010 Waste Discharge Requirements for Oro Loma Sanitary District, Castro Valley Sanitary District, Water Pollution Control Plants | Permit | Alameda County | March | 2018 |
| R2-2018-0011 | Order No. R2-2018-0011 Updated Waste Discharge Requirements and Rescission of Order No. R2-2007-0021 for Waste Management Of California, Inc, Kirby Canyon Recycling and Disposal Facility | Rescission | Santa Clara County | March | 2018 |
| R2-2018-1004 | Order No. R2-2018-1004 against Marin Municipal Water District in the amount of $129,250, pursuant to Water Code sections 13385 and 13323. The Order alleges the District for unplanned chlorinated potable water discharges in violation of its permit for drinking water system discharges to waters of the United States causing fish kill. | Enforcement | Marin County | April | 2018 |
| R2-2018-0012 | Order No. R2-2018-0012 Waste Discharge Requirements for C&H Sugar Company, Inc. and Crockett Community Services District, C&H Sugar Company Refinery | Permit | Contra Costa County | April | 2018 |
| R2-2018-0015 | Order No. R2-2018-0015 Proposed Amendment to the Water Quality Control Plan (Basin Plan) to Establish Water Quality Objectives and a Total Maximum Daily Load (TMDL) for Dissolved Oxygen in Suisun Marsh and to Amend the San Francisco Bay Mercury TMDL to Include Suisun Marsh | Resolution | Solano County | April | 2018 |
| R2-2018-0016 | Order No. R2-2018-0016 Waste Discharge Requirements for City of San Mateo, City of Foster City Estero Municipal Improvement District, City of San Mateo Wastewater Treatment Plant and its Collection System | Permit | San Mateo | May | 2018 |
| R2-2018-0017 | Order No. R2-2018-0017 Waste Discharge Requirements for NRG Delta, LLC, Pittsburg Generating Station | Permit | Contra Costa County | May | 2018 |
| R2-2018-0018 | Order No. R2-2018-0018 Rescission of Waste Discharge Requirements for Mrs. Lois and Mr. Greg Tonnesen, Tonnesen Pet Cemetery Class III Waste Disposal Site | Rescission | Solano County | May | 2018 |
| R2-2018-1005 | Order No. R2-2018-1005 Settlement Agreement and Stipulation for Entry of Administrative Civil Liability for Granada Community Services District | Enforcement | San Mateo County | May | 2018 |
| 91-152 | Resolution 91-152, Resolution of Intent Requesting The SWRCB to Accept a Plan for Water Reclamation as Fulfillment of Order WQ 90-5 Requirement for a 120 Million Gallon Per Day Discharge Flow Limit | Resolution | Santa Clara County | October | 1991 |
