State of Vermont AGENCY OF NATURAL RESOURCES Department of Environmental Conservation Watershed Management Division One National Life Drive, Main 2 Montpelier, VT 05620 (802) 828-1535 http://www.anr.state.vt.us/dec/rulessum.htm Vermont Water Quality Standards Environmental Protection Rule Chapter 29(a) Effective October 30, 2014 Contents Chapter 1 GENERAL POLICY ...................................................................................................... 5 Section 1-01 Applicability and Definitions .................................................................................. 5 A. Applicability ....................................................................................................................... 5 B. Definitions .......................................................................................................................... 5 Section 1-02 General Policy ......................................................................................................... 9 A. Water Quality Policy (See 10 V.S.A. §1250) ..................................................................... 9 B. Water Conservation Policy ............................................................................................... 10 C. Riparian Policy ................................................................................................................. 10 D. Basin Planning .................................................................................................................. 10 E. Hydrology Policy .............................................................................................................. 11 F. Classification of Waters .................................................................................................... 11 Section 1-03 Anti-Degradation Policy ........................................................................................ 11 A. General Policy .................................................................................................................. 11 B. Determination of Existing Uses ........................................................................................ 12 C. Protection and Maintenance of High Quality Waters ....................................................... 12 D. Protection of Outstanding Resource Waters ..................................................................... 13 Section 1-04 Discharge Policy .................................................................................................... 13 A. Discharge Criteria ............................................................................................................. 13 B. Assimilative Capacity ....................................................................................................... 14 C. Compliance Schedules ..................................................................................................... 14 Section 1-05 Interpretation ......................................................................................................... 14 Chapter 2 APPLICATION OF STANDARDS ............................................................................. 14 Section 2-01 Sampling and Analysis .......................................................................................... 14 Section 2-02 Flow Values Used to Evaluate Compliance with Applicable Numeric Criteria for Rivers, Streams, Brooks, Creeks, and Riverine Impoundments ..................................................... 15 A. Natural Flow Regime........................................................................................................ 15 B. Natural Flow Regime Altered by Human-made Structures .............................................. 15 Section 2-03 Nonpoint Source Pollution .................................................................................... 16 A. Policy ................................................................................................................................ 16 B. Use of Management Practices and Planning .................................................................... 16 Section 2-04 Special Zones ......................................................................................................... 16 Vermont Water Quality Standards, Environmental Protection Rule Chapter 29(a) 2 A. Mixing Zones .................................................................................................................... 16 B. Waste Management Zones ................................................................................................ 17 Section 2-05 Public Water Supply .............................................................................................. 18 A. Designation ....................................................................................................................... 18 B. Public Water Supply Management ................................................................................... 18 Chapter 3 DETERMINATION OF CRITERIA ............................................................................ 18 Section 3-01 Water Quality Criteria and Indices - General ........................................................ 18 A. Natural Influences ............................................................................................................. 18 B. General Criteria ................................................................................................................ 18 C. Hydrology Criteria ............................................................................................................ 23 D. Numeric Biological Indices .............................................................................................. 25 Section 3-02 Class A(1) Ecological Waters................................................................................ 26 A. Management Objectives ................................................................................................... 26 B. Water Quality Criteria for Class A(1) Ecological Waters ................................................ 26 Section 3-03 Class A(2) Public Water Supplies ......................................................................... 29 A. Management Objectives ................................................................................................... 29 B. Water Quality Criteria for Class A(2) Public Water Supplies .......................................... 29 Section 3-04 Class B Waters....................................................................................................... 32 A. Management Objectives ................................................................................................... 32 B. Water Quality Criteria for Class B waters ........................................................................ 32 Section 3-05 Fish Habitat Designation ....................................................................................... 37 Section 3-06 Water Management Types ..................................................................................... 37 A. Purpose ............................................................................................................................. 37 B. Water Management Type Designation Process ................................................................ 37 Chapter 4 WATER QUALITY CLASSIFICATIONS .................................................................. 39 Section 4-01. Classification of the Batten Kill Walloomsac and Hoosic Basin (Basin 1) .......... 39 Section 4-02. Classification of the Poultney-Mettawee Basin (Basin 2) ..................................... 41 Section 4-03. Classification of the Otter Creek Basin (Basin 3) ................................................. 41 Section 4.04. Classification of the Southern Champlain Basin (Basin #4) ................................. 43 Section 4-05. Classification of the Northern Champlain Basin (Basin #5) ................................. 44 Section 4.06. Classification of the Missisquoi Basin (Basin 6)................................................... 45 Section 4-07. Classification of Lamoille Basin (Basin 7)............................................................ 46 Section 4-08. Classification of the Winooski Basin (Basin 8)..................................................... 47 Vermont Water Quality Standards, Environmental Protection Rule Chapter 29(a) 3 Section 4-09. Classification of the White River Basin (Basin 9)2Section 4-09. Classification of the White Basin (Basin 9) ............................................................................................................... 49 Section 4-10. Classification of the Ottauquechee-Black Basin (Basin 10) ................................. 49 Section 4-11. Classification of the West-Williams-Saxtons Basin (Basin 11) ............................ 50 Section 4-12 Classification of the Deerfield Basin (Basin 12) ................................................... 52 Section 4-13. Classification of the Lower Connecticut Basin (Basin 13) ................................... 52 Section 4-14. Classification of the Stevens-Wells-Waits-Ompompanoosuc Basin (Basin 14) ... 54 Section 4-15. Classification of the Passumpsic Basin (Basin 15) ............................................... 54 Section 4-16. Classification of the Northern Connecticut Basin (Basin 16) ............................... 56 Section 4-17. Classification of the Memphremagog Basin (Basin 17) ........................................ 57