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  1. Title: MassGIS 2003 Massachusetts Interim Wellhead Protection Areas for Community Water Supply (March 2003)

    Contributors:

    Summary: This datalayer contains polygons representing Interim Wellhead Protection Areas (IWPA) for community water supply (IWPACOM) sources as defined by the Massachusetts Department of Environmental Protection. Wellhead protection areas are important for protecting the recharge area around public water supply (PWS) wells. A Zone II is a wellhead protection area that has been determined by hydrogeologic modeling and approved by the Department of Environmental Protection's (DEP) Drinking Water Program (DWP). In cases where hydro-geologic modeling studies have not been performed and there is no approved Zone II, an Interim Wellhead Protection Area (IWPA) is established based on DEP DWP well pumping rates or default values. Certain land uses may be either prohibited or restricted in both approved (Zone II) and interim (IWPA) wellhead protection areas. In the absence of an approved Zone II, DEP has adopted the Interim Wellhead Protection Area (IWPA) as the primary, protected recharge area for PWS groundwater sources. For PWS sources that pump less than 100,000 gallons per day (GPD), the IWPA radius is proportional to the pumping rate in gallons per minute (GPM). Pumping rate is determined by DEP DWP based on one of the following methods, DWP approved pumping rate, metered data or Title 5 flow rate. The formula used for calculating the PWS well point buffer radius in feet is: Radius = ( 32 x pumping rate in GPM ) + 400 The minimum IWPA radius is 400 feet, the maximum (default) radius reached at 100,000 GPD (70 GPM) is 2,640 feet (1/2 mile). In instances where DWP pumping rate information is unavailable DWP approved default radius values are assigned based on PWS well classification. The default radius for community class PWS groundwater sources (GW) is 2,640 feet (804.6 meters). The default radius for non-community sources is 750 feet (228.6 meters) for Non Transient (NTNC) wells and 500 feet (152.4 meters) for Transient (TNC) wells. The DEP GIS Program currently [2003] maintains two statewide IWPA coverages (IWPA and IWPACOM) shared through MassGIS. Both are generated by buffering groundwater sources in the DEP Public Water Supply datalayer (PWS_DEP). The IWPA coverage contains variable width IWPA buffers for BOTH approved community and non community groundwater sources in the DEP PWS datalayer which do not have an approved Zone II. The IWPACOM coverage contains IWPAs ONLY for community PWS sources which do not have an approved Zone II.

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  2. Title: MassGIS 2003 Massachusetts Interim Wellhead Protection Areas (March 2003)

    Contributors:

    Summary: This datalayer contains polygons representing Interim Wellhead Protection Areas (IWPA) for community and non-community water supply sources as defined by the Massachusetts Department of Environmental Protection. Wellhead protection areas are important for protecting the recharge area around public water supply (PWS) wells. A Zone II is a wellhead protection area that has been determined by hydrogeologic modeling and approved by the Department of Environmental Protection's (DEP) Drinking Water Program (DWP). In cases where hydro-geologic modeling studies have not been performed and there is no approved Zone II, an Interim Wellhead Protection Area (IWPA) is established based on DEP DWP well pumping rates or default values. Certain land uses may be either prohibited or restricted in both approved (Zone II) and interim (IWPA) wellhead protection areas. In the absence of an approved Zone II, DEP has adopted the Interim Wellhead Protection Area (IWPA) as the primary, protected recharge area for PWS groundwater sources. For PWS sources that pump less than 100,000 gallons per day (GPD), the IWPA radius is proportional to the pumping rate in gallons per minute (GPM). Pumping rate is determined by DEP DWP based on one of the following methods, DWP approved pumping rate, metered data or Title 5 flow rate. The formula used for calculating the PWS well point buffer radius in feet is: Radius = ( 32 x pumping rate in GPM ) + 400 The minimum IWPA radius is 400 feet, the maximum (default) radius reached at 100,000 GPD (70 GPM) is 2,640 feet (1/2 mile). In instances where DWP pumping rate information is unavailable DWP approved default radius values are assigned based on PWS well classification. The default radius for community class PWS groundwater sources (GW) is 2,640 feet (804.6 meters). The default radius for non-community sources is 750 feet (228.6 meters) for Non Transient (NTNC) wells and 500 feet (152.4 meters) for Transient (TNC) wells. The DEP GIS Program currently [2003] maintains two statewide IWPA coverages (IWPA and IWPACOM) shared through MassGIS. Both are generated by buffering groundwater sources in the DEP Public Water Supply datalayer (PWS_DEP). The IWPA coverage contains variable width IWPA buffers for BOTH approved community and non-community groundwater sources in the DEP PWS datalayer which do not have an approved Zone II. The IWPACOM coverage contains IWPAs ONLY for community PWS sources which do not have an approved Zone II.

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  3. Title: MassGIS 2003 Massachusetts Surface Water Supply Protection Areas (Zone C) (Arcs) (March 2003)

    Contributors:

    Summary: This datalayer consists of arcs representing boundaries of Massachusetts Surface Water Supply Protection Zones (Zone C). (See also the Surface Water Supply Protection Zones (Zone C) (Polygons) and the Surface Water Supply Protection Zones (Zone C) (Region Polygons) datalayers.) Three datalayers (ZONE A, ZONE B, ZONE C) delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones: ZONE A: represents a) the land area between the surface water source and the upper boundary of the bank; b) the land area within a 400 foot lateral distance from the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a); and c) the land area within a 200 foot lateral distance from the upper boundary of the bank of a tributary or associated surface water body. ZONE B: represents the land area within one-half mile of the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a), or edge of watershed, whichever is less. Zone B always includes the land area within a 400 ft lateral distance from the upper boundary of the bank of the Class A surface water source. ZONE C: represents the land area not designated as Zone A or B within the watershed of a Class A surface water source, as defined in 314 CMR 4.05(3)(a). All known surface water supplies have zones delineated, but some may be covered by other legislation. Areas with a status value of M are included for reference but are not covered by 310 CMR 22.00. Each area is delineated in a separate datalayer, Zone A, Zone B, and Zone C.

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  4. Title: MassGIS 2003 Massachusetts Hydrography (1:25,000) (Arcs) (March 2003)

    Contributors:

    Summary: The MassGIS 1:25,000 Hydrography datalayer represents hydrographic (water-related) features, including surface water (lakes, ponds, reservoirs), wetlands, bogs, flats, rivers, streams, and others (see attributes section below). MassGIS has edited and modified the USGS 1:25,000 Hydrography Digital Line Graph (DLG) quadrangle files and the USGS 1:100,000 Hydrography DLG files and digitized hydrographic features from the USGS 1:25,000 Topographic Quadrangles to produce a hybrid 1:25,000 Massachusetts Hydrography Datalayer. The 1:100,000 DLG features were enhanced by digitizing those streams and ponds from the USGS quadrangles that were not part of the 1:100,000 data. MassGIS has also scanned USGS mylar separates to begin replacing the 1:100,000 enhanced data with 1:25,000 features.

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  5. Title: MassGIS 2003 Massachusetts Approved Wellhead Protection Areas (Zone II) (Arcs) (March 2003)

    Contributors:

    Summary: This datalayer contains polylines representing internal and external boundaries of approved Wellhead Protection (Zone II) Areas for the state of Massachusetts as defined by the Massachusetts Department of Environmental Protection (DEP). Wellhead protection areas are important for protecting the recharge area around public water supply (PWS) wells. A Zone II is a wellhead protection area that has been determined by hydrogeologic modeling and approved by the Department of Environmental Protection's (DEP) Drinking Water Program (DWP). In cases where hydro-geologic modeling studies have not been performed and there is no approved Zone II, an Interim Wellhead Protection Area (IWPA) is established based on DEP DWP well pumping rates or default values. Certain land uses may be either prohibited or restricted in both approved (Zone II) and interim (IWPA) wellhead protection areas. As stated in 310 CMR 22.02, a Zone II is: 'That area of an aquifer which contributes water to a well under the most severe pumping and recharge conditions that can be realistically anticipated (180 days of pumping at safe yield, with no recharge from precipitation). It is bounded by the groundwater divides which result from pumping the well and by the contact of the aquifer with less permeable materials such as till or bedrock. In some cases, streams or lakes may act as recharge boundaries. In all cases, Zone IIs shall extend up gradient to its point of intersection with prevailing hydrogeologic boundaries (a groundwater flow divide, a contact with till or bedrock, or a recharge boundary).' DEP Zone II and Public Water Supply (PWS) data are closely linked, and DEP Zone II data should be used in association with the DEP Public Water Supply datalayer (PWS_DEP). During the approval process each Zone II is assigned a unique ID (ZII-NUM) by DEP DWP. The DEP Public Water Supply and Zone II datalayers use the ZII-NUM to link protected PWS sources to their approved Zone II. Since some PWS sources within a Zone II may not have been used to delineate that Zone II, the ZII-NUM item can be used to identify the specific wells for which a Zone II was delineated. If the DEP Public Water Supply datalayer item ZII-NUM is equal to 0 than that PWS source has no Zone II and should therefore have an Interim Wellhead Protection Area (IWPA).

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  6. Title: MassGIS 2003 Massachusetts Surface Water Supply Protection Areas (Zone B) (Region Polygons) (March 2003)

    Contributors:

    Summary: This datalayer consists of polygons representing Massachusetts Surface Water Supply Protection Zone regions (Zone B). (See also the Surface Water Supply Protection Zones (Zone B) (Polygons) datalayer.) Three datalayers (ZONE A, ZONE B, ZONE C) delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones: ZONE A: represents a) the land area between the surface water source and the upper boundary of the bank; b) the land area within a 400 foot lateral distance from the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a); and c) the land area within a 200 foot lateral distance from the upper boundary of the bank of a tributary or associated surface water body. ZONE B: represents the land area within one-half mile of the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a), or edge of watershed, whichever is less. Zone B always includes the land area within a 400 ft lateral distance from the upper boundary of the bank of the Class A surface water source. ZONE C: represents the land area not designated as Zone A or B within the watershed of a Class A surface water source, as defined in 314 CMR 4.05(3)(a). All known surface water supplies have zones delineated, but some may be covered by other legislation. Areas with a status value of M are included for reference but are not covered by 310 CMR 22.00. Each area is delineated in a separate datalayer, Zone A, Zone B, and Zone C.

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  7. Title: MassGIS 2003 Massachusetts Geographic Place Names : Hypsographic Features (March 2003)

    Contributors:

    Summary: This point datalayer represents place names for hypsographic features in the state of Massachusetts (March 2003), which may be used for map labels. The Massachusetts Department of Environmental Protection (DEP) GIS Group and MassGIS maintain the data. Geographic Place Names for the state are grouped into 3 separate datalayers: Hydrographic Features - lakes, ponds, streams, rivers, bays, harbors, channels Civic Features - city and town names, sections, villages Hypsographic Features - hills, mountains, points, beaches, islands

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  8. Title: MassGIS 2003 Massachusetts Approved Wellhead Protection Areas (Zone II) (Region Polygons) (March 2003)

    Contributors:

    Summary: This datalayer contains polygons representing approved Wellhead Protection (Zone II) Area regions for the state of Massachusetts as defined by the Massachusetts Department of Environmental Protection (DEP). Because wells tend to be clustered by the nature of the resource they tap, the Zone IIs protecting those wells will frequently overlap. As a result of this overlap, intersecting Zone IIs are composed of multiple polygons and more than one Zone II can share an individual polygon. The regions data model represents complex area features and supports overlapping or non-contiguous areas. The Zone II data layer uses the regions feature class and topological structure to manage polygonal overlap, by combining all the polygons a Zone II comprises into a single region feature subclass (see the Approved Wellhead Protection Areas (Zone II) (Polygons) layer for component polygons) . Wellhead protection areas are important for protecting the recharge area around public water supply (PWS) wells. A Zone II is a wellhead protection area that has been determined by hydrogeologic modeling and approved by the Department of Environmental Protection's (DEP) Drinking Water Program (DWP). In cases where hydro-geologic modeling studies have not been performed and there is no approved Zone II, an Interim Wellhead Protection Area (IWPA) is established based on DEP DWP well pumping rates or default values. Certain land uses may be either prohibited or restricted in both approved (Zone II) and interim (IWPA) wellhead protection areas. As stated in 310 CMR 22.02, a Zone II is: 'That area of an aquifer which contributes water to a well under the most severe pumping and recharge conditions that can be realistically anticipated (180 days of pumping at safe yield, with no recharge from precipitation). It is bounded by the groundwater divides which result from pumping the well and by the contact of the aquifer with less permeable materials such as till or bedrock. In some cases, streams or lakes may act as recharge boundaries. In all cases, Zone IIs shall extend up gradient to its point of intersection with prevailing hydrogeologic boundaries (a groundwater flow divide, a contact with till or bedrock , or a recharge boundary).' DEP Zone II and Public Water Supply (PWS) data are closely linked, and DEP Zone II data should be used in association with the DEP Public Water Supply datalayer (PWS_DEP). During the approval process each Zone II is assigned a unique ID (ZII-NUM) by DEP DWP. The DEP Public Water Supply and Zone II datalayers use the ZII-NUM to link protected PWS sources to their approved Zone II. Since some PWS sources within a Zone II may not have been used to delineate that Zone II, the ZII-NUM item can be used to identify the specific wells for which a Zone II was delineated. If the DEP Public Water Supply datalayer item ZII-NUM is equal to 0 than that PWS source has no Zone II and should therefore have an Interim Wellhead Protection Area (IWPA).

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  9. Title: MassGIS 2003 Massachusetts Geographic Place Names : Hydrographic Features (March 2003)

    Contributors:

    Summary: This point datalayer represents place names for hydrographic features in the state of Massachusetts (March 2003), which may be used for map labels. The Massachusetts Department of Environmental Protection (DEP) GIS Group and MassGIS maintain the data. Geographic Place Names for the state are grouped into 3 separate datalayers: Hydrographic Features - lakes, ponds, streams, rivers, bays, harbors, channels Civic Features - city and town names, sections, villages Hypsographic Features - hills, mountains, points, beaches, islands

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  10. Title: MassGIS 2003 Massachusetts Surface Water Supply Protection Areas (Zone C) (Region Polygons) (March 2003)

    Contributors:

    Summary: This datalayer consists of polygons representing Massachusetts Surface Water Supply Protection Zone regions (Zone C). (See also the Surface Water Supply Protection Zones (Zone C) (Polygons) and the Surface Water Supply Protection Zones (Zone C) (Arcs) datalayers.) Three datalayers (ZONE A, ZONE B, ZONE C) delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones: ZONE A: represents a) the land area between the surface water source and the upper boundary of the bank; b) the land area within a 400 foot lateral distance from the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a); and c) the land area within a 200 foot lateral distance from the upper boundary of the bank of a tributary or associated surface water body. ZONE B: represents the land area within one-half mile of the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a), or edge of watershed, whichever is less. Zone B always includes the land area within a 400 ft lateral distance from the upper boundary of the bank of the Class A surface water source. ZONE C: represents the land area not designated as Zone A or B within the watershed of a Class A surface water source, as defined in 314 CMR 4.05(3)(a). All known surface water supplies have zones delineated, but some may be covered by other legislation. Areas with a status value of M are included for reference but are not covered by 310 CMR 22.00. Each area is delineated in a separate datalayer, Zone A, Zone B, and Zone C.

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  11. Title: MassGIS 2003 Massachusetts Surface Water Supply Protection Areas (Zone B) (Polygons) (March 2003)

    Contributors:

    Summary: This datalayer consists of polygons representing Massachusetts Surface Water Supply Protection Zones (Zone B). (See also the Surface Water Supply Protection Zones (Zone B) (Region Polygons) datalayer.) Three datalayers (ZONE A, ZONE B, ZONE C) delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones: ZONE A: represents a) the land area between the surface water source and the upper boundary of the bank; b) the land area within a 400 foot lateral distance from the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a); and c) the land area within a 200 foot lateral distance from the upper boundary of the bank of a tributary or associated surface water body. ZONE B: represents the land area within one-half mile of the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a), or edge of watershed, whichever is less. Zone B always includes the land area within a 400 ft lateral distance from the upper boundary of the bank of the Class A surface water source. ZONE C: represents the land area not designated as Zone A or B within the watershed of a Class A surface water source, as defined in 314 CMR 4.05(3)(a). All known surface water supplies have zones delineated, but some may be covered by other legislation. Areas with a status value of M are included for reference but are not covered by 310 CMR 22.00. Each area is delineated in a separate datalayer, Zone A, Zone B, and Zone C.

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  12. Title: MassGIS 2003 Massachusetts Cape Cod Non-potential Drinking Water Source Areas (March 1997)

    Contributors:

    Summary: This datalayer contains polygons representing Non-Potential Drinking Water Source Areas (NPDWSA) for Cape Cod, Martha's Vineyard, Nantucket, and the Elizabeth Islands, Massachusetts. For the purpose of identifying areas in which clean up of hazardous waste sites must meet drinking water standards, as defined in the Massachusetts Contingency Plan (MCP) (310 CMR 40.0000), the DEP has coded polygons within the aquifer coverage to identify 'Non Potential Drinking Water Source Areas' (NPDWSAs). NPDWSAs include any Potentially Productive Aquifer or portion thereof which underlies land areas of at least 100 acres developed for one or more of the following uses as of January 1, 1996: Industry; Commerce; Dense residential development and associated uses; Transportation; or Urban open space; and those portions of Potentially Productive Aquifers that underlie US Census block groups with population densities of greater than 4,400 persons/square mile. Polygons for which the item NPDWSA = 1 are designated as NPDWSAs; those coded 0 for NPDWSA are not designated as NPDWSAs. As defined in the MCP, a Potentially Productive Aquifer means all aquifers delineated by the USGS as high or medium yield, and all aquifers located east of the Cape Cod Canal (Cape Cod), on the Elizabeth Islands, on Martha's Vineyard, or on Nantucket. NPDWSA polygons were delineated by the DEP based on land use information in the MassGIS land use coverage and population density data from the 1990 US Census. Municipalities were given the opportunity to review the DEP's delineation of NPDWSAs prior to the September 1996 promulgation of the current MCP groundwater clean up regulations. The delineation of NPDWSAs may reflect additional land use information provided by municipalities.

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  13. Title: MassGIS 2003 Massachusetts Geographic Place Names : Civic Features (March 2003)

    Contributors:

    Summary: This point datalayer represents place names for civic features in the state of Massachusetts (March 2003), which may be used for map labels. The Massachusetts Department of Environmental Protection (DEP) GIS Group and MassGIS maintain the data. Geographic Place Names for the state are grouped into 3 separate datalayers: Hydrographic Features - lakes, ponds, streams, rivers, bays, harbors, channels Civic Features - city and town names, sections, villages Hypsographic Features - hills, mountains, points, beaches, islands

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  14. Title: MassGIS 2003 Massachusetts Surface Water Supply Protection Areas (Zone A) (Region Polygons) (March 2003)

    Contributors:

    Summary: This datalayer consists of polygons representing Massachusetts Surface Water Supply Protection Zone regions (Zone A). (See also the Surface Water Supply Protection Zones (Zone A) (Polygons) datalayer.) Three datalayers (ZONE A, ZONE B, ZONE C) delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones: ZONE A: represents a) the land area between the surface water source and the upper boundary of the bank; b) the land area within a 400 foot lateral distance from the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a); and c) the land area within a 200 foot lateral distance from the upper boundary of the bank of a tributary or associated surface water body. ZONE B: represents the land area within one-half mile of the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a), or edge of watershed, whichever is less. Zone B always includes the land area within a 400 ft lateral distance from the upper boundary of the bank of the Class A surface water source. ZONE C: represents the land area not designated as Zone A or B within the watershed of a Class A surface water source, as defined in 314 CMR 4.05(3)(a). All known surface water supplies have zones delineated, but some may be covered by other legislation. Areas with a status value of M are included for reference but are not covered by 310 CMR 22.00. Each area is delineated in a separate datalayer, Zone A, Zone B, and Zone C.

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  15. Title: MassGIS 2003 Massachusetts Surface Water Supply Protection Areas (Zone A) (Polygons) (March 2003)

    Contributors:

    Summary: This datalayer consists of polygons representing Massachusetts Surface Water Supply Protection Zones (Zone A). (See also the Surface Water Supply Protection Zones (Zone A) (Region Polygons) datalayer.) Three datalayers (ZONE A, ZONE B, ZONE C) delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones: ZONE A: represents a) the land area between the surface water source and the upper boundary of the bank; b) the land area within a 400 foot lateral distance from the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a); and c) the land area within a 200 foot lateral distance from the upper boundary of the bank of a tributary or associated surface water body. ZONE B: represents the land area within one-half mile of the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a), or edge of watershed, whichever is less. Zone B always includes the land area within a 400 ft lateral distance from the upper boundary of the bank of the Class A surface water source. ZONE C: represents the land area not designated as Zone A or B within the watershed of a Class A surface water source, as defined in 314 CMR 4.05(3)(a). All known surface water supplies have zones delineated, but some may be covered by other legislation. Areas with a status value of M are included for reference but are not covered by 310 CMR 22.00. Each area is delineated in a separate datalayer, Zone A, Zone B, and Zone C.

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  16. Title: MassGIS 2003 Massachusetts Hydrography (1:25,000) (Polygons) (March 2003)

    Contributors:

    Summary: The MassGIS 1:25,000 Hydrography datalayer represents hydrographic (water-related) features, including surface water (lakes, ponds, reservoirs), wetlands, bogs, flats, rivers, streams, and others (see attributes section below). MassGIS has edited and modified the USGS 1:25,000 Hydrography Digital Line Graph (DLG) quadrangle files and the USGS 1:100,000 Hydrography DLG files and digitized hydrographic features from the USGS 1:25,000 Topographic Quadrangles to produce a hybrid 1:25,000 Massachusetts Hydrography Datalayer. The 1:100,000 DLG features were enhanced by digitizing those streams and ponds from the USGS quadrangles that were not part of the 1:100,000 data. MassGIS has also scanned USGS mylar separates to begin replacing the 1:100,000 enhanced data with 1:25,000 features.

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  17. Title: MassGIS 2003 Massachusetts Public Water Supplies (March 2003)

    Contributors:

    Summary: The Public Water Supply (PWS) datalayer contains points representing the locations of Massachusetts public community surface and groundwater supply sources and public non-community supply sources as defined in 310 CMR 22.00. The public water supply systems represented in this datalayer are based primarily on information in the Massachusetts Department of Environmental Protection's (DEP) Water Quality Testing System (WQTS) database. The WQTS database is the Department's central database for tracking water supply data. The PWS datalayer also contains the locations of proposed wells that have a defined DEP approved wellhead protection area (Zone IIs). Proposed sources are not currently tracked in WQTS. Massachusetts Drinking Water Regulations (310 CMR 22.00) As stated in 310 CMR 22.02, a Public Water System means a system for the provision to the public of piped water for human consumption if such system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days of the year. Such term includes (1) any collection, treatment, storage and distribution facilities under control of the operator of such a system and used primarily in connection with such system, and (2) any collection or pretreatment storage facilities not under such control which are used primarily in connection with such system. A public water system is either a 'community water system' or a 'non-community water system.' (a) Community water system means a public water system which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents. (b) Non-community water system means a public water system that is not a community water system. 1. Non-transient non-community water system or 'NTNC' means a public water systems that is not a community water system and that regularly serves at least 25 of the same persons or more approximately four or more days per week, more that six months or 180 days per year, such as a workplace providing water to it's employees. 2. Transient non-community water system or 'TNC' means a public water system that is not a community water system or a non-transient non-community water system but is a public water system which serves water to 25 different persons at least 60 days of the year. Some examples of these types of systems are: restaurants, motels, camp grounds, parks, golf courses, ski areas and community centers.

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  18. Title: MassGIS 2003 Massachusetts Approved Wellhead Protection Areas (Zone II) (Polygons) (March 2003)

    Contributors:

    Summary: This datalayer contains polygons representing approved Wellhead Protection (Zone II) Areas for the state of Massachusetts as defined by the Massachusetts Department of Environmental Protection (DEP). Wellhead protection areas are important for protecting the recharge area around public water supply (PWS) wells. A Zone II is a wellhead protection area that has been determined by hydrogeologic modeling and approved by the Department of Environmental Protection's (DEP) Drinking Water Program (DWP). In cases where hydro-geologic modeling studies have not been performed and there is no approved Zone II, an Interim Wellhead Protection Area (IWPA) is established based on DEP DWP well pumping rates or default values. Certain land uses may be either prohibited or restricted in both approved (Zone II) and interim (IWPA) wellhead protection areas. As stated in 310 CMR 22.02, a Zone II is: 'That area of an aquifer which contributes water to a well under the most severe pumping and recharge conditions that can be realistically anticipated (180 days of pumping at safe yield, with no recharge from precipitation). It is bounded by the groundwater divides which result from pumping the well and by the contact of the aquifer with less permeable materials such as till or bedrock. In some cases, streams or lakes may act as recharge boundaries. In all cases, Zone IIs shall extend up gradient to its point of intersection with prevailing hydrogeologic boundaries (a groundwater flow divide, a contact with till or bedrock , or a recharge boundary).' DEP Zone II and Public Water Supply (PWS) data are closely linked, and DEP Zone II data should be used in association with the DEP Public Water Supply datalayer (PWS_DEP). During the approval process each Zone II is assigned a unique ID (ZII-NUM) by DEP DWP. The DEP Public Water Supply and Zone II datalayers use the ZII-NUM to link protected PWS sources to their approved Zone II. Since some PWS sources within a Zone II may not have been used to delineate that Zone II, the ZII-NUM item can be used to identify the specific wells for which a Zone II was delineated. If the DEP Public Water Supply datalayer item ZII-NUM is equal to 0 than that PWS source has no Zone II and should therefore have an Interim Wellhead Protection Area (IWPA).

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  19. Title: MassGIS 2003 Massachusetts Surface Water Supply Protection Areas (Zone C) (Polygons) (March 2003)

    Contributors:

    Summary: This datalayer consists of polygons representing Massachusetts Surface Water Supply Protection Zones (Zone C). (See also the Surface Water Supply Protection Zones (Zone C) (Region Polygons) and the Surface Water Supply Protection Zones (Zone C) (Arcs) datalayers.) Three datalayers (ZONE A, ZONE B, ZONE C) delineate those areas included in 310 CMR 22.00, the Massachusetts Drinking Water Regulations, as Surface Water Supply Protection Zones: ZONE A: represents a) the land area between the surface water source and the upper boundary of the bank; b) the land area within a 400 foot lateral distance from the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a); and c) the land area within a 200 foot lateral distance from the upper boundary of the bank of a tributary or associated surface water body. ZONE B: represents the land area within one-half mile of the upper boundary of the bank of a Class A surface water source, as defined in 314 CMR 4.05(3)(a), or edge of watershed, whichever is less. Zone B always includes the land area within a 400 ft lateral distance from the upper boundary of the bank of the Class A surface water source. ZONE C: represents the land area not designated as Zone A or B within the watershed of a Class A surface water source, as defined in 314 CMR 4.05(3)(a). All known surface water supplies have zones delineated, but some may be covered by other legislation. Areas with a status value of M are included for reference but are not covered by 310 CMR 22.00. Each area is delineated in a separate datalayer, Zone A, Zone B, and Zone C.

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  20. Title: MassGIS 2003 Massachusetts Schools (May 2002)

    Contributors:

    Summary: This datalayer shows the location of 1,898 public and 623 private schools, pre-school through high school, in Massachusetts. This data was developed by the Massachusetts Department of Environmental Protection's (DEP) GIS Program based on database information provided by the Massachusetts Department of Education (DOE).

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