Testing Demo 1: Surface Water Bodies Near Facilities
Demo Question: What surface water bodies are near landfills or Department of Defense sites?
Use Case Area: Prioritize Testing and Identify Gaps
This demo presents two related SAWGraph queries. The first identifies nearby lakes and ponds, while the second extends the analysis to surface water flowlines downstream from the selected facilities. Together, they demonstrate how spatial and hydrologic relationships can support decisions about where additional environmental testing or investigation may be useful.
What This Demo Connects
Facilities
Landfills and Department of Defense sites included in the queries.
Surface Water
Lakes, ponds, rivers, and flowlines represented in the SAWGraph hydrology data.
Spatial and Hydrologic Relationships
S2 cells and neighboring-cell relationships used to identify nearby features, together with downstream connectivity used to trace flowlines.
Demo Results
The maps show facilities and surface water features returned from the SAWGraph queries based on the datasets currently represented in the graph. Results therefore reflect the scope and version of those datasets, as well as the conditions of the queries.
Spatial proximity may help identify areas for further investigation or testing, but it does not establish that a facility released PFAS or that a nearby water body is contaminated.
The maps are interactive. Pan and zoom to explore the results, use the layer controls to show or hide different types of features, and explore mapped features for additional information.
Lakes and Ponds
This map shows facilities of the selected types together with nearby lakes and ponds returned from the SAWGraph query.
Facilities and water bodies are displayed by default. The layer control can also display the facility S2 cells and neighboring S2 cells used to establish the spatial relationship.
Nearby and Downstream Flowlines
This map shows facilities of the selected types together with surface water flowlines returned from the SAWGraph query. It distinguishes flowlines associated with the facility locations from additional flowlines downstream in the hydrologic network.
The available layers include facilities, facility S2 cells, nearby flowlines, and downstream flowlines.
Code and Query Resources
View the notebooks used to run the queries and generate the interactive maps.