Regulation 61-68, Water Classifications and Standards

Section A. Purpose and Scope

Section B. Definitions

Section C. Applicability of Standards

Section D. Antidegradation Rules

Section E. General Rules and Standards Applicable to All Waters

Section F. Narrative Biological Criteria

Section G. Class Descriptions, Designations, and Specific Standards for Surface Waters

• Outstanding National Resource Waters
• Outstanding Resource Waters
• Trout Waters
• Freshwaters
• Shellfish Harvesting Waters
• Class SA
• Class SB

Section H. Class Descriptions and Specific Standards for Ground Waters

• Class GA
• Class GB
• Class GC

Section I. Severability

Appendix. Water Quality Numeric Criteria for the Protection of Aquatic Life and Human Health

• Priority Toxic Pollutants
• Non Priority Pollutants
• Organoleptic Effects
• Water Quality Criteria Additional Notes
• Attachment 1 – Conversion Factors for Dissolved Metals
• Attachment 2 – Parameters for Calculating Hardness-Dependent Criteria
• Attachment 3 – Calculation of Freshwater Ammonia Criterion
• Attachment 4 – Calculation of the Sample Specific Freshwater Acute and Chronic Criterion for Metals