The Monitoring, Assessment and Planning Program conducts various Assessment and Listing activities to characterize the quality of Vermont's surface waters:
In accordance with the federal Water Pollution Control Act (also known as the Clean Water Act), the Monitoring, Assessment and Planning Program periodically publishes assessment reports concerning the quality of Vermont’s surface waters. The purpose of Water Quality Assessment reports is to interpret water quality monitoring information from sites within an area of interest, and, where appropriate, relate that information to causes of observed problems and sources of pollutants. Surface waters are assessed using the Surface Water Assessment and Listing Methodology. See below for links to individual basin and subwatershed assessment reports.
Individual Basin Assessment Reports:
-Battenkill, Hoosic, and Walloomsac River Watersheds
-Southern Lake Champlain Watersheds
-Otter, Little Otter, and Lewis Creek Watersheds
-Northern Lake Champlain Watersheds
-Missisquoi Bay Basin
-Lamoille River Basin
-Winooski River Basin
-White River Basin
-Black, Ottauquechee River (and adjacent) Watersheds
-West, Williams, and Saxtons Rivers plus adjacent Lower CT River Tributary Watersheds
-Deerfield River and adjacent Lower Connecticut River Tributary Watersheds
-Stevens, Wells, Waits, Ompompanoosuc Rivers plus adjacent CT River Tributary Watersheds
-Passumpsic River Basin
-Upper Connecticut River Watersheds
-Lake Memphremagog Basin
Section 305(b) Water Quality Integrated Assessment Report
Section 305(b) of the Federal Water Pollution Control Act (also known as the Clean Water Act or CWA) requires each state to submit a report about the quality of the state's surface and ground waters to the US Environmental Protection Agency (EPA) on a biennial basis.
For the purposes of identifying and tracking important water quality problems where the Vermont Water Quality Standards (VTWQS) are not met, VTDEC has developed the Vermont Priority Waters List. This list is composed of several parts, each identifying a group of waters with unique water quality concerns that are either impaired or altered:
Part A (303d list): These waters are assessed as impaired due to one or more pollutants for which a TMDL is required to be developed. This list is developed in even-numbered years and submitted to EPA for approval according federal Clean Water Act regulations.
Part B: These waters are assessed as impaired by a pollutant but because other pollution control mechanisms are in place, no TMDL is required to be developed. Water Quality Remediation Plans are one potential tool for addressing impairments.
Part D: These waters are assessed as impaired by a pollutant and have a completed TMDL that has been approved by EPA.
Part E: These waters are assessed as altered where aquatic habitat and/or other designated uses are not supported due to the extent of invasive aquatic species.
Part F: These waters are assessed as altered due to hydrologic factors. These often include a lack of flow, water level or flow fluctuations or some other modified hydrologic condition.
Final 2016 Documents:
Part A: 303(d) list of Impaired Waters
Part B: Impaired waters for which a TMDL is not required
Part D: Impaired waters with an approved TMDL
Stressed Waters List. These waters have been assessed as stressed where stressors are present that prohibit the waters from attaining higher water quality.
Additional Listing Documents:
- The 2016 EPA approval documentation
- A summary of comments received on the 2014 Draft Priority Waters List including the 303(d) List of Impaired Waters.
- All 305(b) reports from 1980 - 2016
Pursuant to 40 C.F.R. §130.7(b), the State may use a Water Quality Remediation Plan (WQRP) in lieu of a TMDL for an impaired water when the State determines that the pollution control requirements of the WQRP are stringent enough to meet State Water Quality Standards within a reasonable period of time. The WQRP procedure is described here.
Jay Peak Resort:
- 2014 Water Quality Monitoring Plan Report
- 2014 Water Quality Remediation Plan (Updated)
- 2015 Water Quality Remediation Plan Update
- 2015 Water Quality Monitoring Plan Report
- 2015 Supplemental Turbidity Monitoring
Mount Snow Resort:
Stowe Mountain Resort:
- Big Spruce Brook Iron Seep Remediation Plan
- West Branch Little River Remediation Plan
- Stowe Mountain Resort 2012 Monitoring Report
- Stowe Mountain Resort 2014 Monitoring Report
- Stowe Mountain Resort 2015 Monitoring Report
Stratton Mountain Resort:
- Stratton Water Quality Remediation Plan
- Stratton Water Quality Remediation Plan 2011 Status Update
- Stratton Water Quality Remediation Plan 2015 Performance Report
- Rice Brook and Clay Brook Water Quality Remediation Plan
- Rice Brook and Clay Brook 2010 Biomonitoring Report
- National Aquatic Resource Survey Initiative- MAPP participates in EPA’s National Aquatic Resource Survey Initiative, which provides the opportunity to conduct statewide water quality assessments separately for streams, lakes, and wetlands for both a state and national picture of water quality.
- Probability Assessments- MAPP characterizes the biological condition of Vermont’s wadeable streams based on the results of statewide probability-based surveys, which are conducted jointly with US EPA’s National Rivers and Streams Assessment.
- Stream Geomorphic Assessments- VTDEC also assesses geomorphologic conditions through the Stream Geomorphic Assessment efforts of our Rivers Program.
Previous assessments: Battenkill, Hoosic, and Walloomsac River Watersheds (August 2002)
Updated assessment reports: Hoosic River Watershed (December 2014)
Previous assessments: Poultney - Mettawee Watersheds (December 1999)
Updated assessment reports: Poultney - Mettawee Watersheds (January 2013)
Previous assessments: Otter, Little Otter, and Lewis Creeks (June 1998)
Updated assessment reports: Scheduled for 2017
Previous assessments: Northern Lake Champlain Basins, Including Pike and Rock Rivers (December 2003)*
*Note: Rock and Pike Rivers were included in the 2003 report, but are addressed as part
of the Missisquoi Bay Basin in subsequent assessments.
Previous assessments: Missisquoi River Watershed (November 2004)*
Updated assessment reports: Missisquoi Bay Basin (August 2015)
*Note: Rock and Pike Rivers were included in the 2003 Northern Lake Champlain Basins report, but are addressed as part of the Missisquoi Bay Basin in subsequent assessments.
Previous assessments: Lamoille River Basin (February 2001)
Updated assessment reports: Lamoille River Watershed Assessment Report February 2016
Previous assessments: Winooski River Basin (April 2008)
Updated assessment reports: Scheduled for 2016
Updated assessment reports: White River Basin (November 2012)
Previous assessments: Black and Ottauquechee River Watersheds (June 2000)*
Updated assessment reports: Black River Watershed (October 2016); Ottauquechee River Watershed including Mills Brook and Lulls Brook (October 2016)
*Note: Only the Black and Ottauquechee Rivers were included in the 2000 report, but adjacent CT River direct drainages will be included in subsequent reports.
*Note: Only the West, Williams, and Saxtons Rivers were included in the 2001 report, but adjacent Lower CT River direct drainages were assessed separately in 2002 and 2014, and will now be included in subsequent reports.
Previous assessments: Deerfield River Watershed (March 2003)*
Updated assessment reports: Deerfield River Watershed (December 2012)*
*Note: Only the Deerfield River watershed was included in the 2003 and 2012 reports, but adjacent Lower CT River direct drainages were assessed with other direct drainages in 2002 and 2014 (see above) and will now be included with the Deerfield in subsequent reports.
Previous assessments: Stevens, Wells, Waits and Ompompanoosuc Rivers Watersheds (April 1999)*
Updated assessment reports: Stevens River Watershed (June 2014); Wells River Watershed (August 2014); Waits River and Halls Brook Watersheds (August 2014); Ompompanoosuc River and adjacent CT River Tributary Watersheds (December 2014)*
*Note: The Stevens, Wells, Waits and Ompompanoosuc Rivers Watersheds were assessed as a group in 1999. Adjacent direct CT River drainages were assessed with the Upper CT River watersheds in 2011 (see below) and again in 2014 in conjunction with the Ompompanoosuc. These will continue to be assessed with the Ompompanoosuc in subsequent reports.
Previous assessments: Passumpsic River Basin (June 2009)
Updated assessment reports: Passumpsic River Basin (February 2013)
Previous assessments: Upper Connecticut River Watersheds (March 2011)*
Updated assessment reports: Scheduled for 2016
*Note: Some more southerly CT River direct drainages included in the 2011 report were assessed again in 2014 in conjunction with the Ompompanoosuc River Basin, and will continue to be assessed with the Ompompanoosuc in subsequent reports.
Previous assessments: Lake Memphremagog (March 2006)*
Updated assessment reports: Lake Memphremagog Basin Assessment Report 2015
*Note: The Lake Memphremagog Basin includes two international watersheds (the Tomifobia and Coaticook Rivers) that do not flow directly to the lake, though are also part of the greater Saint Lawrence River Basin.