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Map features: 3,990Public water supply source locations in Massachusetts
MassGIS Bureau of Geographic Information
Prepared
Surface Water Supply Protection Areas (ZONE A, B, C): Surface Water Protection Areas - Zone A — Massachusetts
Explore 177 source records for Surface Water Supply Protection Areas (ZONE A, B, C): Surface Water Protection Areas - Zone A — Massachusetts. View the map or download the GeoJSON snapshot.
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The table shows up to eight fields. The download keeps all fields and the original geometry.
About this dataset
- Snapshot prepared on 2026-10-09. This is not a live service. The source update date can be earlier.
- All 177 records in the reviewed snapshot are retained, with all source fields and record IDs. This layer is not a complete inventory of all places in the region.
- Source coordinates use WGS84. Altitude and measure values are omitted.
- 17 invalid source geometries were repaired with Shapely linework make_valid. Polygon holes and collapsed lines or points are retained. Repair can change filled areas where source rings cross or overlap.
- Geometry was simplified locally with a 0.0001 degree tolerance and topology preservation. Records that could not be simplified to valid geometry retain their repaired geometry.
- This map is for overview use. Do not use it for precise boundary measurement.
- Original source metadata and reuse evidence: https://drawonamap.com/library/sources/government-2026-10/surface-water-supply-protection-areas-zone-a-b-c-surface-water-protection-areas-zone-a-massachu-72471b31.json
- Credit MassGIS (Bureau of Geographic Information), Commonwealth of Massachusetts EOTSS.
Source and licence
MassGIS Bureau of Geographic Information
Licence: MassGIS public-use terms
GeoJSON download details
The download includes all 177 features as area groups, areas. Coordinates use longitude and latitude in WGS84.
The preparation date is when we prepared this dataset. Read the source notes for the dates covered by the data.
GeoJSON fields 12
OBJECTID- OBJECTID. Source field from MassGIS Bureau of Geographic Information.
SOURCE_ID- SOURCE_ID. Source field from MassGIS Bureau of Geographic Information.
SWPZONE- SWPZONE. Source field from MassGIS Bureau of Geographic Information.
ACRES- ACRES. Source field from MassGIS Bureau of Geographic Information.
SITE_NAME- SITE_NAME. Source field from MassGIS Bureau of Geographic Information.
PWSID- PWSID. Source field from MassGIS Bureau of Geographic Information.
SUPPLIER- SUPPLIER. Source field from MassGIS Bureau of Geographic Information.
DELINYEAR- DELINYEAR. Source field from MassGIS Bureau of Geographic Information.
DELINTYPE- DELINTYPE. Source field from MassGIS Bureau of Geographic Information.
COMMENTS- COMMENTS. Source field from MassGIS Bureau of Geographic Information.
Shape__Area- SHAPE.AREA. Source field from MassGIS Bureau of Geographic Information.
Shape__Length- SHAPE.LEN. Source field from MassGIS Bureau of Geographic Information.
