This page, MassGIS Data: MassDEP 2016 Integrated List of Waters (305(b)/303(d)), is offered by

MassGIS Data: MassDEP 2016 Integrated List of Waters (305(b)/303(d))

December 2020

The MassDEP Division of Watershed Management (DWM), Watershed Planning Program (WPP) 2016 Integrated List of Waters data layer represents the surface water quality assessment and impairment decisions reported to EPA, as required by the Federal Clean Water Act (CWA) Sections 305(b), 314, and 303(d).

Table of Contents

Downloads

Download this layer:

Each download includes an ArcMap 10 layer (LYR) file and Excel spreadsheets.

 

Overview

The MassDEP Division of Watershed Management (DWM), Watershed Planning Program’s (WPP) 2016 Integrated List of Waters data layer provides EPA-approved water quality assessment and listing decisions for the 2016 reporting cycle, as required by the Clean Water Act (CWA) under Sections 305(b), 314, and 303(d). The objective of the CWA is to restore and maintain the chemical, physical, and biological integrity of the Nation's waters. As one step toward meeting this goal each state must administer a program to monitor and assess the quality of its surface waters and provide periodic status reports to the U.S. Environmental Protection Agency (EPA).

Section 305(b) of the CWA codifies the process whereby waters are evaluated with respect to their capacity to support designated uses as defined in the Massachusetts Surface Water Quality Standards. These uses include aquatic life, fish consumption, drinking water, shellfish harvesting, primary (e.g., swimming) and secondary (e.g., boating) contact-recreation, and aesthetics. The 305(b) process entails assessing each of these uses, where applicable, for rivers, lakes and coastal waters using all readily available data and information according to the guidance available in the state’s Consolidated Assessment and Listing Methodology (CALM) manual (MassDEP 2016). States list each waterbody or portion thereof, referred to as an assessment unit (AU), in one of the following five categories:

Category 1) Unimpaired and not threatened for all designated uses;

Category 2) Unimpaired for some uses and not assessed for others;

Category 3) Insufficient information to make assessments for any uses;

Category 4) Impaired for one or more uses, but not requiring the calculation of a Total Maximum Daily Load (TMDL)

  • Category 4A) Impaired for one or more designated uses but does not require the development of a TMDL: TMDL has been completed.
  • Category 4B) Impaired for one or more designated uses but does not require the development of a TMDL: Other pollution control requirements are reasonably expected to result in the attainment of designated uses.
  • Category 4C) Impaired for one or more designated uses but does not require the development of a TMDL: Impairment is not caused by a pollutant.

 

Category 5) Impaired for one or more uses and requiring a TMDL (impairment due to pollutant(s) such as nutrients, metals, pesticides, solids and pathogens).

Waters listed in Category 5 constitute the 303(d) List. The formulation of the 303(d) List includes a more rigorous public review and comment process than does reporting under Sections 305(b) and 314, and the final version of the list must be formally approved by the EPA. Where waters are determined to be impaired, causes and sources of use impairment are identified. Once a water body is identified as impaired by a pollutant, MassDEP is required under Section 303(d) of the CWA to develop a pollutant limit designed to restore the health of the impaired water body. The process of developing the pollutant limit or maximum load, generally referred to as a Total Maximum Daily Load (TMDL), includes identifying the cause (type of pollutant) and source (where the pollutant comes from), determining how much of the pollutant is from direct discharges (point sources) or indirect discharges (non-point sources), determining the maximum amount of the pollutant that can be discharged to a specific water body and still meet water quality standards, and developing a plan to meet that goal. Upon implementation, TMDLs can restore water quality and enable waters to attain their designated uses.

The 2016 Integrated List of Waters data layer is the spatial representation of the river, lake, and estuary AUs assessed and summarized in the Massachusetts Year 2016 Integrated List of Waters report to the EPA. See the Massachusetts Year 2016 Integrated Lists of Waters & Related Reports , or contact Arthur Johnson (508-767-2873) or Richard Chase (508-767-2859) in the MassDEP, Watershed Planning Program.

Data Layers

The Massachusetts 2016 Integrated List of Waters data layer comprises two feature classes:

  • the IL_2016_ARC (alias: Water Body AUs - Rivers (arcs)) for linear features (rivers and a few estuaries) and
  • the IL_2016_POLY (alias: Water Body AUs - Lakes, Estuaries (polygons)) for polygon features (lakes and estuaries).

Tables and Relationship Classes

  • A related table, IL_ATTAINS_2016, contains each use attainment status, and when impaired the cause(s), source(s), and any approved TMDL(s) associated with each AU. The IL_ATTAINS_2016 table has a many-to-one relationship with both the arc and polygon features. That relationship is built into the geodatabase with the relationship classes IL_ARC_TO_ATTAINS_2016 and IL_POLY_TO_ATTAINS_2016 but must be established by users of the shapefile version using the AU_ID field. Because of the many-to-one relationship the IL_ATTAINS_2016 table is not suitable for summarizing certain data (e.g., size, number of AUs, etc.).
  • A second table, IL_SEGDEF_2016, contains information that can be used for summarizing certain data (e.g., classification, size, number of AUs, etc.).

Also included is a feature class (IL_DWMWPP_WATERSHEDS_POLY) (alias: DWM WPP Integrated List Watershed Delineations) showing the DWM/WPP watershed delineations.

Production

Definitions of water body AUs are determined by WPP based on information from various databases or data sources (e.g. SegDef and ATTAINS databases; stream and lake inventory lists). The geo-referencing of individual AUs relied on the use of information that was derived from: USGS 1:25,000 Topographic Maps, National Oceanic and Atmospheric Administration Nautical Charts at several scales, and the "Planimetry of Harbors for the 1984 305(b) Report". Where definitions were still ambiguous after using these references, DWM/WPP staff members were consulted to define and geo-reference individual water body AUs.

River AUs: Individual river AUs are represented as one or more lines in the arc feature class. Linework was derived from the MassGIS 1:25,000 hydrography based on USGS topographic maps. Additional on-screen editing was performed as needed using USGS topographic quadrangles and/or MassGIS 2001/2003 Aerial Images  as a base map for all river AUs.

Lake AUs: Lake AUs are represented as one or more polygons in the polygon feature class. Lake AU polygons were selected from the MassGIS 1:25,000 hydrography layer, where available, and placed in a separate file where additional editing (typically closure lines) may have been performed. In some cases AUs were drawn and/or edited to reflect current conditions using USGS topographic quadrangles, and/or MassGIS 2001/2003 Aerial Images  as the base map.

Estuary AUs: Estuary AUs are represented as polygons. Where available, polygons are derived from the MassGIS 1:25,000 hydrography based on the name and description of each estuarine AU. Additional on-screen digitizing to close polygons to reflect waters actually assessed, but that may not have been represented in the hydrography layer, was completed using the USGS topographic quadrangles as the base map.

All AUs (Rivers, Lakes, Estuaries): River, lake, and estuary features, regardless of their derivation, were combined into two single statewide feature classes, one for lines (IL_2016_ARC alias: Water Body AUs - Rivers (arcs)) and one for polygons (IL_2016_POLY alias: Water Body AUs - Lakes, Estuaries (polygons)). There is no AU overlap in any two adjacent river, lake or estuary features.

Attributes

Except for standard GIS items (e.g., Shape_Length (meters), Shape_Area (square meters), Shape, OBJECTID, FID), all attributes were obtained from the DWM/WPP and are presented in the table IL_ATTAINS_2016. This table has a many-to-one relationship with individual features in the IL_2016_ARC and IL_2016_POLY features classes. Only attributes that are the same for every record concerning a feature were added to the attribute table of the feature set. A water body AU has only one unique identifier (AU_ID) and description, however, in the ATTAINS table the individual AU information repeats as necessary to accommodate the number of uses assessed, each cause of impairment, and each source for the cause of impairment. The IL_ATTAINS_2016 table can be related to geographic features using the AU_ID. The additional table (IL_SEGDEF_2016) can be used for summarizing data and can be related to geographic features using the AU_ID.

Fields in the IL_2016_POLY and IL_2016_ARC attribute tables are as follows:

Cycle Reporting cycle year.
WBID_2016 Assessment Unit ID (AU_ID) with the reporting cycle year.
Watershed The MassDEP DWM/WPP watershed delineations are based on the MassGIS Major Basins layer; modified to reflect surface drainage areas for use with the MassDEP Integrated List of Waters report by the WPP. For example, a portion of the Cape Cod Watershed Area was changed to reflect its drainage into Buzzards Bay, resulting in shape changes for both the Cape Cod and Buzzards Bay watershed delineations. In general, the watershed name is based on the Massachusetts Stream and River Inventory System (SARIS) that includes all Massachusetts river basins and coastal drainage areas (Halliwell et al. 1982). The WPP watershed name Boston Harbor (Proper) does not appear in the MassGIS Major Basins layer or the SARIS list of watersheds; it refers to the harbor itself. Three drainage area types are further described in SARIS as follows: River Basin: Major inland river basin. River Basin and Coastal Drainage Area: Major inland river basin coupled with smaller areas draining directly to coastal waters within the general geographic area of the associated river basin. Coastal Drainage Area: Subdivisions of the coastal drainage system that have been partitioned into specific geographic areas. These areas all drain to coastal waters but may have multiple small-scale drainages.
Waterbody Water body names are based on three inventory systems: Stream and River Inventory System (SARIS), Pond and Lake Inventory System (PALIS), or Coastal and Marine Inventory System (CAMIS).
AU_ID Water body Assessment Unit identification code (AU_ID) for the 2016 cycle of the Massachusetts Integrated List of Waters report.
Location1 Description of the water body AU.
Location2 Continuation of the location description if LOCATION1 exceeds 255 characters.
WaterCode Unique water body code based on SARIS, PALIS, or CAMIS inventory coding systems.
WaterType Water body AU type: River (including streams, brooks, etc.), Lake (including ponds, reservoirs, etc.), or Estuary
AU_Size Size of the water body AU. (Some historic values in this field may have been based on measurements made with map wheels and other techniques including, but not limited to, planimetry using USGS Quad sheets at a scale of 1:25,000. New values are generated using GIS.) AU_Size is the size reported to the EPA for the AU (portion within the state not necessarily the entire waterbody).
Size_Unit Water body size units: Miles (Rivers), Acres (Lakes), Square Miles (Estuaries)
Class Class assigned to water body as described in the Massachusetts Surface Water Quality Standards (314 CMR 4.00). (Clarification Note: Classification is reflective of version of Standards available at time when assessment decisions were made.)
Qualifier Class qualifiers (e.g., WWF [warm water fishery], CWF [cold water fishery], etc.) assigned to water body as defined in the Massachusetts Surface Water Quality Standards (314 CMR 4.00). (Clarification Note: Classification is reflective of version of Standards available at time when assessment decisions were made.)
Category
The category of the water body AU in the Massachusetts Year 2016 Integrated List of Waters report; category descriptions are as follows:
Category 1:   Unimpaired and not threatened for all designated uses.
Category 2:   Unimpaired for some uses and not assessed for others.
Category 3:   Insufficient information to make assessments for any uses.
Category 4A:   Impaired for one or more designated uses but does not require the development of a TMDL: TMDL has been completed.
Category 4B:   Impaired for one or more designated uses but does not require the development of a TMDL: Other pollution control requirements are reasonably expected to result in the attainment of designated uses.
Category 4C:   Impaired for one or more designated uses but does not require the development of a TMDL: Impairment is not caused by a pollutant.
Category 5:   Impaired for one or more uses and requiring a TMDL (impairment due to pollutant(s) such as nutrients, metals, pesticides, solids and pathogens).
TMDL_count The number of unique MassDEP DWM/WPP TMDL reports associated with the AU for the 2016 reporting cycle.

 

Fields in the IL_ATTAINS_2016 attribute table are as follows:

Cycle Reporting cycle year.
Watershed The MassDEP DWM/WPP watershed delineations are based on the MassGIS Major Basins layer; modified to reflect surface drainage areas for use with the MassDEP Integrated List of Waters report by the WPP. For example, a portion of the Cape Cod Watershed Area was changed to reflect its drainage into Buzzards Bay, resulting in shape changes for both the Cape Cod and Buzzards Bay watershed delineations. In general, the watershed name is based on the Massachusetts Stream and River Inventory System (SARIS) that includes all Massachusetts river basins and coastal drainage areas (Halliwell et al., 1982). The WPP watershed name Boston Harbor (Proper) does not appear in the MassGIS Major Basins layer or the SARIS list of watersheds; it refers to the harbor itself. Three drainage area types are further described in SARIS as follows: River Basin: Major inland river basin. River Basin and Coastal Drainage Area: Major inland river basin coupled with smaller areas draining directly to coastal waters within the general geographic area of the associated river basin. Coastal Drainage Area: Subdivisions of the coastal drainage system that have been partitioned into specific geographic areas. These areas all drain to coastal waters but may have multiple small-scale drainages.
Waterbody Water body names are based on three inventory systems: Stream and River Inventory System (SARIS), Pond and Lake Inventory System (PALIS), or Coastal and Marine Inventory System (CAMIS).
AU_ID Water body Assessment Unit identification code (AU_ID) for the 2016 cycle of the Massachusetts Integrated List of Waters report.
Location1 Description of the water body AU.
Location2 Continuation of the location description if LOCATION1 exceeds 255 characters.
WaterCode Unique water body code based on SARIS, PALIS, or CAMIS inventory coding systems.
WaterType Water body AU type: River (including streams, brooks, etc.), Lake (including ponds, reservoirs, etc.), or Estuary.
AU_Size Size of the water body AU. (Some historic values in this field may have been based on measurements made with map wheels and other techniques including, but not limited to, planimetry using USGS Quad sheets at a scale of 1:25,000. New values are generated using GIS.) AU_Size is the size reported to the EPA for the AU (portion within the state not necessarily the entire waterbody).
Size_Unit Water body size units: Miles (Rivers), Acres (Lakes), Square Miles (Estuaries)
Class Class assigned to water body as described in the Massachusetts Surface Water Quality Standards (314 CMR 4.00). (Clarification Note: Classification is reflective of version of Standards available at time when assessment decisions were made.)
Qualifier Class qualifiers (e.g., WWF [warm water fishery], CWF [cold water fishery], etc.) assigned to water body as defined in the Massachusetts Surface Water Quality Standards (314 CMR 4.00). (Clarification Note: Classification is reflective of version of Standards available at time when assessment decisions were made.)
Category
The category of the water body AU in the Massachusetts Year 2016 Integrated List of Waters report; category descriptions are as follows:
Category 1:   Unimpaired and not threatened for all designated uses.
Category 2:   Unimpaired for some uses and not assessed for others.
Category 3:   Insufficient information to make assessments for any uses.
Category 4A:   Impaired for one or more designated uses but does not require the development of a TMDL: TMDL has been completed.
Category 4B:   Impaired for one or more designated uses but does not require the development of a TMDL: Other pollution control requirements are reasonably expected to result in the attainment of designated uses.
Category 4C:   Impaired for one or more designated uses but does not require the development of a TMDL: Impairment is not caused by a pollutant.
Category 5:   Impaired for one or more uses and requiring a TMDL (impairment due to pollutant(s) such as nutrients, metals, pesticides, solids and pathogens).
Use The uses assessed are "Aesthetics", "Fish Consumption", "Fish, other Aquatic Life and Wildlife" (habitat for fish, other aquatic life and wildlife, including for their reproduction, migration, growth and other critical functions), "Primary Contact Recreation", "Public Water Supply", "Secondary Contact Recreation", and "Shellfish Harvesting". Designated uses are defined in the Massachusetts Surface Water Quality Standards (314 CMR 4.00); see at https://www.mass.gov/regulations/314-CMR-4-the-massachusetts-surface-water-quality-standards.
Attainment Field indicating the use attainment for the water body: "Fully Supporting", "Insufficient Information", "Not Assessed", or "Not Supporting"
Alert A DWM/WPP status flag assigned at the use level for a water body when there is some indication of water quality impairment but the assessment criteria are still being met. “Y” indicates there is an alert; “N” indicates there is no alert.
Cause Field identifying a cause of the use impairment in this record. There are 80 different causes named in the Massachusetts Year 2016 Integrated List of Waters report.
POLTNT_FLG The CWA distinguishes between “pollutants” (such as nutrients, metals, pesticides, solids and pathogens) that all require TMDLs and “pollution” (such as low flow, habitat alterations or non-native species infestations) that do not require TMDLs. The POLTNT_FLG field identifies non-pollutant stressors with an “N” to distinguish them from pollutants requiring TMDLs (marked with a “Y”).
Source Field identifying a source related to a cause of the use impairment in this record. There are 82 different sources named in Massachusetts Year 2016 Integrated List of Waters report.
SRCE_CONF A source is either confirmed to exist (“Y”) or not confirmed (“N”).
TMDLEPA_ID Unique numeric identifier assigned by EPA to each approved TMDL.
TMDLDWM_ID The document control number (CN) assigned by MassDEP DWM/WPP to the TMDL report. Multiple TMDLEPA_IDs may be associated with a CN because a report may cover more than one water body or pollutant.
DWM_Title The MassDEP DWM/WPP TMDL report title.
Info_Name A relate field created by combining the 'Use, Attainment, Cause, Source, and TMDLDWM_ID' fields.

 

Fields in the IL_SEGDEF_2016 attribute table are as follows:

Cycle Reporting cycle year.
WBID_2016 Assessment Unit ID (AU_ID) with the reporting cycle year.
Watershed The MassDEP DWM/WPP watershed delineations are based on the MassGIS Major Basins layer; modified to reflect surface drainage areas for use with the MassDEP Integrated List of Waters report by the WPP. For example, a portion of the Cape Cod Watershed Area was changed to reflect its drainage into Buzzards Bay, resulting in shape changes for both the Cape Cod and Buzzards Bay watershed delineations. In general, the watershed name is based on the Massachusetts Stream and River Inventory System (SARIS) that includes all Massachusetts river basins and coastal drainage areas (Halliwell et al., 1982). The WPP watershed name Boston Harbor (Proper) does not appear in the MassGIS Major Basins layer or the SARIS list of watersheds; it refers to the harbor itself. Three drainage area types are further described in SARIS as follows: River Basin: Major inland river basin. River Basin and Coastal Drainage Area: Major inland river basin coupled with smaller areas draining directly to coastal waters within the general geographic area of the associated river basin. Coastal Drainage Area: Subdivisions of the coastal drainage system that have been partitioned into specific geographic areas. These areas all drain to coastal waters but may have multiple small-scale drainages.
Waterbody Water body names are based on three inventory systems: Stream and River Inventory System (SARIS), Pond and Lake Inventory System (PALIS), or Coastal and Marine Inventory System (CAMIS).
AU_ID Water body Assessment Unit identification code (AU_ID) for the 2016 cycle of the Massachusetts Integrated List of Waters report.
Location1 Description of the water body AU.
Location2 Continuation of the location description if LOCATION1 exceeds 255 characters.
WaterCode Unique water body code based on SARIS, PALIS, or CAMIS inventory coding systems.
WaterType Water body AU type: River (including streams, brooks, etc.), Lake (including ponds, reservoirs, etc.), or Estuary
AU_Size Size of the water body AU. (Some historic values in this field may have been based on measurements made with map wheels and other techniques including, but not limited to, planimetry using USGS Quad sheets at a scale of 1:25,000. New values are generated using GIS.) AU_Size is the size reported to the EPA for the AU (portion within the state not necessarily the entire waterbody).
Size_Unit Water body size units: Miles (Rivers), Acres (Lakes), Square Miles (Estuaries)
Class Class assigned to water body as described in the Massachusetts Surface Water Quality Standards (314 CMR 4.00). (Clarification Note: Classification is reflective of version of Standards available at time when assessment decisions were made.)
Qualifier Class qualifiers (e.g., WWF [warm water fishery], CWF [cold water fishery], etc.) assigned to water body as defined in the Massachusetts Surface Water Quality Standards (314 CMR 4.00). (Clarification Note: Classification is reflective of version of Standards available at time when assessment decisions were made.)
Category
The category of the water body AU in the Massachusetts Year 2016 Integrated List of Waters report; category descriptions are as follows:
Category 1:   Unimpaired and not threatened for all designated uses.
Category 2:   Unimpaired for some uses and not assessed for others.
Category 3:   Insufficient information to make assessments for any uses.
Category 4A:   Impaired for one or more designated uses but does not require the development of a TMDL: TMDL has been completed.
Category 4B:   Impaired for one or more designated uses but does not require the development of a TMDL: Other pollution control requirements are reasonably expected to result in the attainment of designated uses.
Category 4C:   Impaired for one or more designated uses but does not require the development of a TMDL: Impairment is not caused by a pollutant.
Category 5:   Impaired for one or more uses and requiring a TMDL (impairment due to pollutant(s) such as nutrients, metals, pesticides, solids and pathogens).
TMDL_Count The number of unique MassDEP DWM/WPP TMDL reports associated with the AU for the 2016 reporting cycle.

 

Fields in the IL_DWMWPP_WATERSHEDS_POLY attribute table are as follows (Note: these delineations are based on MassGIS 'Major Basins' layer; modified by the DWM/WPP to reflect surface drainage areas for use with the Massachusetts Year 2016 Integrated List of Waters report by the WPP):

DWM_Name

The MassDEP DWM/WPP watershed delineations are based on the MassGIS Major Basins layer; modified to reflect surface drainage areas for use with the MassDEP Integrated List of Waters report by the WPP. For example, a portion of the Cape Cod Watershed Area was changed to reflect its drainage into Buzzards Bay, resulting in shape changes for both the Cape Cod and Buzzards Bay watershed delineations. In general, the watershed name is based on the Massachusetts Stream and River Inventory System (SARIS) that includes all Massachusetts river basins and coastal drainage areas (Halliwell et al., 1982). The WPP watershed name Boston Harbor (Proper) does not appear in the MassGIS Major Basins layer or the SARIS list of watersheds; it refers to the harbor itself. Three drainage area types are further described in SARIS as follows: River Basin: Major inland river basin. River Basin and Coastal Drainage Area: Major inland river basin coupled with smaller areas draining directly to coastal waters within the general geographic area of the associated river basin. Coastal Drainage Area: Subdivisions of the coastal drainage system that have been partitioned into specific geographic areas. These areas all drain to coastal waters but may have multiple small-scale drainages.

DWM_Code

The watershed identification code used by the DWM/WPP for assigning water body AUs to a watershed. These codes are assigned according to the Massachusetts Stream and River Inventory System (SARIS) -- the first two numbers of which assign 1. the major drainage system and 2. the river basin and coastal drainage area (the sub-basin) (Halliwell et al. 1982).

Drainage

Three drainage area types are further described in SARIS as follows: River Basin: Major inland river basin. River Basin and Coastal Drainage Area: Major inland river basin coupled with smaller areas draining directly to coastal waters within the general geographic area of the associated river basin. Coastal Drainage Area: Subdivisions of the coastal drainage system that have been partitioned into specific geographic areas. These areas all drain to coastal waters but may have multiple small-scale drainages (Halliwell et al. 1982).

References

Ackerman, M.T., R.A. Batiuk, and T.M. Beaudoin. 1984. Compilation of Lakes, Ponds, Reservoirs and Impoundments relative to the Massachusetts Lake Classification Program. Publication: #13786-216-30-8-84-c.r. Technical Services Branch, Massachusetts Division of Water Pollution Control, Department of Environmental Quality Engineering, Westborough, Mass.

Ackerman, M.T. 1989. Compilation of Lakes, Ponds, Reservoirs and Impoundments Relative to the Massachusetts Lake Classification Program. Publication: #15901-171-50-4-89-c.r. Technical Services Branch, Massachusetts Division of Water Pollution Control, Department of Environmental Quality Engineering, Westborough, Mass.

Halliwell, D.B., W.A. Kimball and A.J. Screpetis. 1982. Massachusetts Stream Classification Program Part I: Inventory of Rivers and Streams. Massachusetts Division of Fisheries and Wildlife, Department of Fisheries, Wildlife, and Recreational Vehicles and Massachusetts Division of Water Pollution Control, Department of Environmental Quality Engineering. Westborough, Mass.

MassDEP. 2013. Massachusetts Surface Water Quality Standards (Revision of 314 CMR 4.00, effective December 6, 2013). Massachusetts Department of Environmental Protection, Boston, Mass.

MassDEP. 2016. Massachusetts Consolidated Assessment and Listing Methodology (CALM) Guidance Manual for the 2016 Reporting Cycle. CN445.0. Massachusetts Department of Environmental Protection, Division of Watershed Management. Worcester, Mass.

MassDEP. Unpublished. Coastal and Marine Inventory System (CAMIS): Compilation of Non-SARIS/PALIS Identified Estuarine Waters. Massachusetts Department of Environmental Protection, Division of Watershed Management. Worcester, Mass.

 

Maintenance

Since the Massachusetts Year 2016 Integrated List of Waters report is approved by EPA, it is static and will not change. The next planned update of 305(b)/303(d) assessments and associated geo-references will be for the 2018/2020 reporting cycle. For the 2018/2020 assessments, the DWM/WPP will re-use many water body AUs, will create new AUs as needed, and may edit some AUs due to new information. The DWM/WPP will update the geo-references for the 2018/2020 Integrated List of Waters data layer where necessary. After public and EPA review of the draft 2018/2020 cycle assessments and proposed listings, a proposed final 2018/2020 Integrated List of Waters will be submitted to EPA for approval. Following EPA approval, a final Massachusetts 2018/2020 Integrated List of Waters report will be published, and the geographic representations and related tables will also be made available at MassGIS. For questions regarding the programmatic content of these data contact Arthur Johnson (508-767-2873) or Richard Chase (508-767-2859) in the MassDEP, Watershed Planning Program.

For questions relating to GIS and these data, contact Kashif Rashid (617-292-5851) in the MassDEP, GIS Program.

Feedback