| #R001 | administrative | reporting | mandatory | Use of 2023 Revised Forms | wastewater | Applicants for EPA-issued NPDES permits are to use the new application forms as revised in 2023 posted below. | Applicable for EPA-issued NPDES permits beginning July 31, 2023 | high |
| #R002 | administrative | reporting | mandatory | Physical Signature Requirement | wastewater | You must print and then sign the form as EPA does not accept electronic signatures on individual NPDES permit applications. | All individual NPDES permit applications | high |
| #R003 | administrative | reporting | mandatory | Form 1 Mandatory Completion | wastewater | All applicants for individual NPDES permits, with the exception of publicly owned treatment works (POTWs) and other treatment works treating domestic sewage (TWTDS), must complete Form 1. | All applicants except POTWs and TWTDS | high |
| #R004 | administrative | reporting | mandatory | Form 2A Completion for POTWs | wastewater | Complete this form if your facility is a new or existing POTW. | New or existing Publicly Owned Treatment Works | high |
| #R005 | administrative | reporting | mandatory | Form 2B Completion for CAFO/CAAP | agricultural water | Complete this form and Form 1 if your facility is a new or existing concentrated animal feeding operation (CAFO) or concentrated aquatic animal production (CAAP) facility. | New or existing CAFO or CAAP facilities | high |
| #R006 | administrative | reporting | mandatory | Form 2C Completion for Existing Process Wastewater | wastewater | Complete this form and Form 1 if your facility is an existing manufacturing, commercial, mining, or silvicultural facility that currently discharges process wastewater. | Existing manufacturing, commercial, mining, or silvicultural facilities with process wastewater discharge | high |
| #R007 | administrative | reporting | mandatory | Form 2D Completion for New Process Wastewater | wastewater | Complete this form and Form 1 if your facility is a new manufacturing, commercial, mining, or silvicultural facility that has yet to commence discharge of process wastewater. | New manufacturing, commercial, mining, or silvicultural facilities prior to discharge commencement | high |
| #R008 | administrative | reporting | mandatory | Form 2E Completion for Nonprocess Wastewater | wastewater | Complete this form and Form 1 if your facility is a new or existing manufacturing, commercial, mining, or silvicultural facility that discharges only nonprocess wastewater. | Facilities discharging exclusively nonprocess wastewater | high |
| #R009 | administrative | reporting | mandatory | Form 2F Completion for Industrial Stormwater | wastewater | Complete this form and Form 1 if you are a new or existing facility whose discharge is composed entirely of stormwater associated with industrial activity, excluding discharges from construction activity under 40 CFR 122.26(b)(14)(x) or (b)(15). | Industrial activity stormwater discharges (excluding specific construction activities) | high |
| #R010 | administrative | reporting | mandatory | Requirements for Mixed Stormwater Discharges | wastewater | If your discharge is composed of stormwater and non-stormwater, you must complete Forms 1 and 2F, and you must complete Form 2C, 2D, or 2E, as appropriate. | Mixed stormwater and non-stormwater discharges | high |
| #R011 | administrative | reporting | mandatory | Form 2S Completion for TWTDS | wastewater | Complete Form 2S if you are a new or existing TWTDS. | New or existing treatment works treating domestic sewage | high |
| #R012 | administrative | reporting | guidance | Application Tip Sheet Review | wastewater | Before completing the forms, review [NPDES Applications Tip Sheet] (85.36 KB). | Prior to completing application forms | high |
| #R013 | administrative | reporting | recommended | State-Specific Form Determination | wastewater | If you are located in a jurisdiction in which a state administers the NPDES program, you should contact the state to determine the appropriate application form(s) to submit. | Located in a jurisdiction where a state administers the NPDES program | high |
| #R014 | prohibition | operational | mandatory | Zero Discharge Prohibition | wastewater | Some wastestreams have zero discharge requirements. | Applicable to specific wastestreams within glass manufacturing subcategories as defined in 40 CFR Part 426. | high |
| #R015 | operational | operational | mandatory | Best Management Practices for Leaks and Spills | wastewater | control of leaks and spills | Applicable to facilities in Subparts B (Bleached Papergrade Kraft and Soda) and E (Papergrade Sulfite) | high |
| #R016 | operational | operational | mandatory | Best Management Practices for Intentional Diversions | wastewater | control intentional diversions of spent pulping liquor, soap, and turpentine | Applicable to facilities in Subparts B (Bleached Papergrade Kraft and Soda) and E (Papergrade Sulfite) | high |
| #R017 | administrative | reporting | guidance | Chloroform Compliance Self-Certification | wastewater | allows demonstration of compliance by self-certification | Applicable to Subpart B facilities as a reduction in monitoring requirements for chloroform | high |
| #R018 | reporting | reporting | mandatory | Milestones Plan Requirements | wastewater | milestones plan requirements | Follow-up to the 1998 rule for the pulp and paper category | high |
| #R019 | administrative | health | mandatory | Adoption of DPR Criteria | drinking water, wastewater | AB 574 requires the State Water Board to adopt uniform water recycling criteria for DPR through raw water augmentation on or before December 31, 2023. | Direct Potable Reuse through raw water augmentation | high |
| #R020 | administrative | health | mandatory | Expert Panel Review and Finding | drinking water, wastewater | Before the State Water Board can adopt uniform water recycling criteria for DPR raw water augmentation, an expert panel must review the proposed criteria and make a finding as to whether, in its expert opinion, the proposed criteria would adequately protect public health (Water Code section 13561.2). | Prior to adoption of uniform water recycling criteria for DPR raw water augmentation | high |
| #R021 | administrative | reporting | mandatory | Consultation on Insufficient Research | drinking water, wastewater | If the State Water Board finds that it is not able to adopt uniform water recycling criteria for DPR due to insufficient information from the DPR research conducted, the State Water Board must consult with the expert panel regarding the research and the need for additional scientific and technical research necessary for the State Water Board to complete the criteria. | If information from DPR research is found insufficient for criteria adoption | high |
| #R022 | prohibition | reporting | mandatory | Prohibition on Advance Copy Comments | drinking water, wastewater | Do not submit comments to the State Water Board on the advance copy - all comments submitted before the start of the formal 45-day public comment period will not be considered by the State Water Board. | Advance copy of draft regulation text prior to formal 45-day public comment period | high |
| #R023 | administrative | reporting | mandatory | Stakeholder Input Solicitation | drinking water, wastewater | The State Water Board is seeking public comment, and soliciting stakeholder input from water agencies, wastewater agencies, local public health officers, environmental organizations, environmental justice organizations, public health nongovernmental organizations, and the business community as required by section 13561.2(a)(1). | During the development of anticipated criteria for direct potable reuse | high |
| #R024 | administrative | reporting | guidance | Official Version Acquisition Guidance | drinking water, wastewater | Stakeholders are cautioned to obtain the official version of the proposed regulations once the Notice of Proposed Rulemaking is published. | Once the Notice of Proposed Rulemaking is published | high |
| #R025 | administrative | treatment | mandatory | Research Completion Oversight | drinking water | The State Water Board is coordinating with the Water Research Foundation (WRF) to provide scope and direction, provide technical review, and oversee the completion of five research projects by scientific and technical experts convened by WRF. | Coordination with Water Research Foundation for DPR research | high |
| #R026 | design | health | mandatory | DPR Criteria Development Mandate | drinking water | Develop DPR criteria using information from the DPR research recommended in the State Water Board’s Report to the Legislature, after soliciting stakeholder input. | Pursuant to AB 574 legislative mandates | high |
| #R027 | administrative | health | mandatory | Expert Panel Administration Duty | drinking water | Establish and administer an expert review panel to review the proposed criteria and make a finding as to whether, in its expert opinion, the proposed criteria would adequately protect public health. | Pursuant to AB 574 legislative mandates | high |