Regulations last checked for updates: Feb 07, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
All TitlesTitle 40Chapter IPart 429Subpart D - Subpart D—Dry Process Hardboard Subcategory
View all text of Subpart D [§ 429.50 - § 429.56]
§ 429.56 - Pretreatment standards for new sources (PSNS).

Any new source subject to this subpart which introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.

source: 46 FR 8285, Jan. 26, 1981, unless otherwise noted.
cite as: 40 CFR 429.56
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