Regulations last checked for updates: Mar 13, 2025

Title 40 - Protection of Environment last revised: Nov 13, 2025
§ 436.140 - Applicability; description of the potash subcategory.

The provisions of this subpart are applicable to the processing of potash. Potash obtained from brine lakes is regulated in the saline from brine lakes subcategory (subpart L of this part).

authority: Secs. 301, 304 (b) and (c), Federal Water Pollution Control Act, as amended (33 U.S.C. 1251,1311,1314,86. 816
source: 40 FR 48657, Oct. 16, 1975, unless otherwise noted.
cite as: 40 CFR 436.140