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Regulations last checked for updates: Jul 02, 2026
Title 40 - Protection of Environment last revised: Aug 02, 2026
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Title 40
Chapter I
Part 421
Subpart L - Subpart L—Secondary Silver Subcategory
§ 421.120 - Applicability: Description of the secondary silver subcategory.
§ 421.121 - Specialized definitions.
§ 421.122 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
§ 421.123 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
§ 421.124 - Standards of performance for new sources.
§ 421.125 - Pretreatment standards for existing sources.
§ 421.126 - Pretreatment standards for new sources.
§ 421.127 - [Reserved]
source:
49 FR 8790, Mar. 8, 1984, unless otherwise noted.
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