Parent Layer: Resource Data

Name: Wellhead Protection Zone I

Display Field: SITE_NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: As stated in 310 CMR 22.02, Zone I means the protective radius required around a public water supply well or wellfield. For public water system wells with approved yields of 100,000 gpd or greater, the protective radius is 400 feet. Tubular wellfields require a 250-foot protective radius. Protective radii for all other public water system wells are determined by the following equation: Zone I radius in feet = (150 x log of pumping rate in gpd) - 350. This equation is equivalent to the chart in the Guidelines and Policies for Public Water Systems. A default Zone I radius or a Zone I radius otherwise computed and determined by the Department shall be applied to transient non-community (TNC) and non-transient non-community (NTNC) wells when there is no metered rate of withdrawal or no approved pumping rate. In no case shall the Zone I radius be less than 100 feet.

Copyright Text: MassDEP Drinking Water Program

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Supported Query Formats: JSON, geoJSON, PBF

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Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

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Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

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YMin: 5047189.502192815
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YMax: 5294827.645201834
Spatial Reference: 102100  (3857)

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HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SOURCE_ID ( type: esriFieldTypeString, alias: SOURCE_ID, length: 11 )
• TYPE ( type: esriFieldTypeString, alias: TYPE, length: 6 )
• SITE_NAME ( type: esriFieldTypeString, alias: SITE_NAME, length: 40 )
• SUPPLIER ( type: esriFieldTypeString, alias: SUPPLIER, length: 40 )
• TOWN ( type: esriFieldTypeString, alias: TOWN, length: 21 )
• ZONE1_FT ( type: esriFieldTypeDouble, alias: ZONE1_FT )
• PWS_ID ( type: esriFieldTypeString, alias: PWS_ID, length: 7 )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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