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This GIS map service provides the locations of Non-Transient Non-Community (NTNC) drinking water systems across Maryland. The NTNCs are defined by the Environmental Protection Agency (EPA) as drinking water systems that are not a community drinking water system across an area, but contained within the property where they are located, primarily for a specific building/facility. A NTNC regularly serves at least 25 of the same people over six months of a year. This type of system can be found at schools, daycare centers, manufacturers, hospitals or nursing homes, office buildings, and other facilities.<\/SPAN><\/P>

Note - The spatial locations of the NTNC water systems were derived from the street address for that site and do not represent the actual location of the water system's infrastructure. <\/SPAN><\/P>

The data fields found within this GIS layer are as follows:<\/SPAN><\/P>

Public Water system Identification (PWSID):<\/SPAN><\/P>

The PWSID is a unique number used to identify water systems within a specific state.<\/SPAN><\/P>

System Name:<\/SPAN><\/P>

This is the name of the water system.<\/SPAN><\/P>

Water Source Description:<\/SPAN><\/P>

This column identifies the primary source of the water used by the water system:<\/SPAN><\/P>

  • GW: Groundwater.<\/SPAN><\/P><\/LI>

  • GWP: Groundwater purchased.<\/SPAN><\/P><\/LI>

  • SW: Surface water.<\/SPAN><\/P><\/LI>

  • SWP: Surface water purchased.<\/SPAN><\/P><\/LI>

  • GU: Groundwater under influence of surface water.<\/SPAN><\/P><\/LI>

  • GUP: Purchased groundwater under influence of surface water source.<\/SPAN><\/P><\/LI><\/UL>

    County:<\/SPAN><\/P>

    Name of the county in which the water system is located.<\/SPAN><\/P>

    Data Source:<\/SPAN><\/P>

    This field lists the origin of the displayed water system locations and data:<\/SPAN><\/P>

    • MDE: Internal files.<\/SPAN><\/P><\/LI>

    • Water System: File provided by system.<\/SPAN><\/P><\/LI>

    • County GIS: County provided GIS layers.<\/SPAN><\/P><\/LI>

    • County W&S: Water & Sewer Plan Maps.<\/SPAN><\/P><\/LI>

    • SDWIS: Information from State database.<\/SPAN><\/P><\/LI><\/UL><\/DIV><\/DIV><\/DIV>", "geometryType": "esriGeometryPoint", "sourceSpatialReference": { "wkid": 102100, "latestWkid": 3857, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -20037700, "falseY": -30241100, "xyUnits": 10000, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "Maryland Department of the Environment's Water Supply Program and the Safe Drinking Water Information System (SDWIS)", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "simple", "symbol": { "type": "esriSMS", "style": "esriSMSCircle", "color": [ 115, 223, 255, 255 ], "size": 4, "angle": 0, "xoffset": 0, "yoffset": 0, "outline": { "color": [ 0, 92, 230, 255 ], "width": 0.7 } } }, "scaleSymbols": true, "transparency": 0, "labelingInfo": null }, "defaultVisibility": true, "extent": { "xmin": -8842428.7557, "ymin": 4584057.280299999, "xmax": -8354809.5604, "ymax": 4825465.864200003, "spatialReference": { "wkid": 102100, "latestWkid": 3857, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -20037700, "falseY": -30241100, "xyUnits": 10000, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 } }, "hasAttachments": false, "htmlPopupType": "esriServerHTMLPopupTypeAsHTMLText", "displayField": "PWSID", "typeIdField": null, "subtypeFieldName": null, "subtypeField": null, "defaultSubtypeCode": null, "fields": [ { "name": "OBJECTID", "type": "esriFieldTypeOID", "alias": "Object ID Code", "domain": null }, { "name": "PWSID", "type": "esriFieldTypeString", "alias": "PWSID", "length": 254, "domain": null }, { "name": "COUNTY", "type": "esriFieldTypeString", "alias": "County", "length": 254, "domain": null }, { "name": "SYSTEM", "type": "esriFieldTypeString", "alias": "System Name", "length": 254, "domain": null }, { "name": "SOURCE", "type": "esriFieldTypeString", "alias": "Water Source", "length": 254, "domain": null }, { "name": "Date", "type": "esriFieldTypeString", "alias": "Date", "length": 10, "domain": null }, { "name": "DATA_SOURC", "type": "esriFieldTypeString", "alias": "Data Source", "length": 254, "domain": null } ], "geometryField": {}, "indexes": [ { "name": "R57_pk", "fields": "OBJECTID", "isAscending": true, "isUnique": true, "description": "" } ], "subtypes": [], "relationships": [], "canModifyLayer": true, "canScaleSymbols": false, "hasLabels": false, "capabilities": "Map,Query,Data", "maxRecordCount": 2000, "supportsStatistics": true, "supportsExceedsLimitStatistics": true, "supportsAdvancedQueries": true, "supportedQueryFormats": "JSON, geoJSON, PBF", "isDataVersioned": false, "ownershipBasedAccessControlForFeatures": {"allowOthersToQuery": true}, "useStandardizedQueries": true, "supportedSpatialRelationships": [ "esriSpatialRelIntersects", "esriSpatialRelContains", "esriSpatialRelCrosses", "esriSpatialRelEnvelopeIntersects", "esriSpatialRelIndexIntersects", "esriSpatialRelOverlaps", "esriSpatialRelTouches", "esriSpatialRelWithin", "esriSpatialRelRelation" ], "advancedQueryCapabilities": { "useStandardizedQueries": true, "supportsStatistics": true, "supportsPercentileStatistics": true, "supportsHavingClause": true, "supportsOrderBy": true, "supportsDistinct": true, "supportsCountDistinct": true, "supportsAdvancedQueryRelated": true, "supportsQueryRelatedPagination": true, "supportsPagination": true, "supportsLod": false, "supportsQueryWithLodSR": false, "supportsTrueCurve": true, "supportsQueryWithDatumTransformation": true, "supportsReturningQueryExtent": true, "supportsQueryWithDistance": true, "supportsSqlExpression": true, "supportsTimeRelation": true, "supportsSqlFormat": false, "supportsQueryAnalytic": true, "supportsCurrentUserQueries": true }, "supportsDatumTransformation": true, "advancedQueryAnalyticCapabilities": { "supportsLinearRegression": true, "supportsAsync": false, "supportsPercentileAnalytic": true }, "dateFieldsTimeReference": null, "preferredTimeReference": null, "datesInUnknownTimezone": false, "hasMetadata": true, "isDataArchived": false, "archivingInfo": { "supportsQueryWithHistoricMoment": false, "startArchivingMoment": -1 }, "supportsCoordinatesQuantization": true, "supportsDynamicLegends": true }