Alaska Department of Environmental Conservation Division of Water

18 AAC 70 (Water Quality Standards)

The Public Comment period for this regulation is open from August 15, 2025 through October 24, 2025.

Amendments to 18 AAC 70 to Adopt a Performance-Based Approach for the Development of Site-Specific Criteria Using the Biotic Ligand Model for Copper

Documents and Links

• Online Public Notice
• Technical Support Document
• Implementation of the Biotic Ligand Model for Derivation of Freshwater Aquatic Life Criteria for Copper
• 18 AAC 70 Draft Amendments, public comment version
• Draft Toxics Manual Amendments
• Copper performance-based approach (PBA) FAQ