| Section 461.1 | General definitions | 
                
                
                  | Section 461.2 | Monitoring and reporting requirements | 
                
                
                  | Section 461.3 | Compliance date for PSES | 
                
                
                  | Section 461.4 | Applicability; description of the cadmium subcategory | 
                
                
                  | Section 461.10 | Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control | 
                
                
                  | Section 461.11 | Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology | 
                
                
                  | Section 461.12 | New source performance standards (NSPS) | 
                
                
                  | Section 461.13 | Pretreatment standards for existing sources (PSES) | 
                
                
                  | Section 461.14 | Pretreatment standards for new sources (PSNS) | 
                
                
                  | Section 461.15 | Applicability; description of the calcium subcategory | 
                
                
                  | Section 461.20 | New source performance standards (NSPS) | 
                
                
                  | Section 461.23 | Pretreatment standards for new sources (PSNS) | 
                
                
                  | Section 461.25 | Applicability; description of the lead subcategory | 
                
                
                  | Section 461.30 | Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control | 
                
                
                  | Section 461.31 | Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology | 
                
                
                  | Section 461.32 | New source performance standards (NSPS) | 
                
                
                  | Section 461.33 | Pretreatment standards for existing sources (PSES) | 
                
                
                  | Section 461.34 | Pretreatment standards for new sources (PSNS) | 
                
                
                  | Section 461.35 | Applicability; description of the Leclanche subcategory | 
                
                
                  | Section 461.40 | New source performance standards (NSPS) | 
                
                
                  | Section 461.43 | Pretreatment standards for existing sources (PSES) | 
                
                
                  | Section 461.44 | Pretreatment standards for new sources (PSNS) | 
                
                
                  | Section 461.45 | Applicability; description of the lithium subcategory | 
                
                
                  | Section 461.50 | New source performance standards (NSPS) | 
                
                
                  | Section 461.53 | Pretreatment standards for new sources (PSNS) | 
                
                
                  | Section 461.55 | Applicability; description of the magnesium subcategory | 
                
                
                  | Section 461.60 | New source performance standards (NSPS) | 
                
                
                  | Section 461.63 | Pretreatment standards for existing sources (PSES) | 
                
                
                  | Section 461.64 | Pretreatment standards for new sources (PSNS) | 
                
                
                  | Section 461.65 | Applicability; description of the zinc subcategory | 
                
                
                  | Section 461.70 | Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control | 
                
                
                  | Section 461.71 | Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology | 
                
                
                  | Section 461.72 | New source performance standards | 
                
                
                  | Section 461.73 | Pretreatment standards for existing sources (PSES) | 
                
                
                  | Section 461.74 | Pretreatment standards for new sources (PSNS) | 
                
                
                  | Section 461.75 | Applicability |