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Regulations last checked for updates: Nov 14, 2025
Title 40 - Protection of Environment last revised: Sep 14, 2029
All Titles
Title 40
Chapter I
Part 749
Subpart D - Subpart D—Air Conditioning and Cooling Systems
§ 749.68 - Hexavalent chromium-based water treatment chemicals in cooling systems.
authority:
15 U.S.C. 2605
and 2607
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