NR 230.27 Applicability; description of the borax subcategory.
NR 230.272 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.276 Pretreatment standards for new sources.
Subchapter XXVIII — Boric acid
NR 230.28 Applicability; description of the boric acid subcategory.
NR 230.282 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Subchapter XXIX — Bromine
NR 230.29 Applicability; description of the bromine subcategory.
NR 230.292 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.296 Pretreatment standards for new sources.
Subchapter XXX — Calcium carbonate
NR 230.30 Applicability; description of the calcium carbonate subcategory.
NR 230.302 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Subchapter XXXI — Calcium hydroxide
NR 230.31 Applicability; description of the calcium hydroxide subcategory.
NR 230.311 Specialized definitions.
NR 230.312 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.316 Pretreatment standards for new sources.
Subchapter XXXIII — Carbon monoxide and byproduct hydrogen
NR 230.33 Applicability; description of the carbon monoxide and byproduct hydrogen subcategory.
NR 230.332 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Subchapter XXXIV - Chrome pigments
NR 230.34 Applicability; description of the chrome pigments subcategory.
NR 230.342 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.343 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
NR 230.344 New source performance standards.
NR 230.345 Pretreatment standards for existing sources.
NR 230.346 Pretreatment standards for new sources.
NR 230.347 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
Subchapter XXXV — Chromic acid
NR 230.35 Applicability; description of the chromic acid subcategory.
NR 230.352 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.356 Pretreatment standards for new sources.
Subchapter XXXVI — Copper salts
NR 230.36 Applicability; description of the copper salts subcategory.
NR 230.362 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.363 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
NR 230.364 New source performance standards.
NR 230.365 Pretreatment standards for existing sources.
NR 230.366 Pretreatment standards for new sources.
NR 230.367 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
Subchapter XXXVIII — Ferric chloride
NR 230.38 Applicability; description of the ferric chloride subcategory.
NR 230.381 Specialized definitions.
NR 230.3815 Regulation of contaminated nonprocess wastewater.
NR 230.382 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.385 Pretreatment standards for existing sources.
NR 230.386 Pretreatment standards for new sources.
Subchapter XL — Fluorine
NR 230.40 Applicability; description of the fluorine subcategory.
NR 230.401 Specialized definitions.
NR 230.4015 Regulation of contaminated nonprocess wastewater.
NR 230.402 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.406 Pretreatment standards for new sources.
Subchapter XLI — Hydrogen
NR 230.41 Applicability; description of the hydrogen subcategory.
NR 230.411 Specialized definitions.
NR 230.412 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Subchapter XLII — Hydrogen cyanide
NR 230.42 Applicability; description of the hydrogen cyanide subcategory.
NR 230.422 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.423 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
NR 230.424 New source performance standards.
NR 230.426 Pretreatment standards for new sources.
NR 230.427 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
Subchapter XLIII — Iodine
NR 230.43 Applicability; description of the iodine subcategory.
NR 230.431 Specialized definitions.
NR 230.432 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.436 Pretreatment standards for new sources.
Subchapter XLIV — Lead monoxide
NR 230.44 Applicability; description of the lead monoxide subcategory.
NR 230.441 Specialized definitions.
NR 230.4415 Regulation of contaminated nonprocess wastewater.
NR 230.442 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.445 Pretreatment standards for existing sources.
NR 230.446 Pretreatment standards for new sources.
Subchapter XLV — Lithium carbonate
NR 230.45 Applicability; description of the lithium carbonate subcategory.
NR 230.452 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Subchapter XLVII — Nickel salts
NR 230.47 Applicability; description of the nickel salts subcategory.
NR 230.472 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
NR 230.473 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
NR 230.474 New source performance standards.
NR 230.475 Pretreatment standards for existing sources.
NR 230.476 Pretreatment standards for new sources.
NR 230.477 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.
Subchapter IL — Oxygen and nitrogen
