1. EPA Drinking Water Mapping Application (DWMA) Authors: James Sinnott, RTI International (presenter) Jay Rineer, RTI International William Cooter, RTI International Roger Anzzolin, US EPA, Office of Ground Water and Drinking Water AWRA 2004 Spring Specialty Conference GIS and Water Resources III May 19, 2004

2. The work described in this presentation was funded by the U.S. Environmental Protection Agency under Contract 68-C-01-001 with Research Triangle Institute (RTI). RTI gratefully acknowledges this support. Disclaimer: Although the research described has been funded wholly or in part by the U.S. Environmental Protection Agency Contract 68-C- 01-001 to Research Triangle Institute, it has not been subject to the Agency's review and therefore does not necessarily reflect the views of the Agency, and no official endorsement should be inferred. Mention of trade names or commercial products does not constitute endorsement or recommendation for use. Disclaimer: In the interest of protecting certain types of information, and in accordance with EPA protocol, the GIS data displayed in the following images were rendered for display purposes only and do not accurately represent actual data from EPA’s spatial databases. Acknowledgements

3. DWMA Overview Data Sources Web Interface and Tools Query Functionality System Architecture Presentation Outline

4. A secure Web-based geospatial application for US EPA Office of Ground Water and Drinking Water Enables queries of the Safe Drinking Water Information System (SDWIS/FED) with other federal and state data Identifies potential risks to surface water and groundwater used for public drinking water Generates query driven maps and reports at a variety of spatial scales DWMA Overview

5. Drinking water sources (intakes and wells) from SDWIS/FED Source water (protection) areas from states (SWAs) Point sources of contamination including dischargers, hazardous waste sites, Superfund sites, and state sources Non-point sources of contamination including USGS nitrogen fertilizer use, herbicide use, and USDA animal waste Surface waters represented by the NHD in the RAD Groundwater represented by USGS groundwater regions, principal aquifers, and groundwater atlas A variety of other layers from EPA IGD and RAD and USGS Data Sources

6. Web Interface Header Frame (standard EPA template) Tab Frame Query Frame Map Frame Combines queries and maps Header Frame Tab Frame Map Frame Query Frame

7. Driving the DWMA

8. Drill-Down Tool Drill-down Functionality Show states matching query definition at national scale Click on state, show matching counties served at state scale Click on county, show matching water sources at local scale National Scale State Scale Local Scale

9. Use of Existing Web Reports Custom hyperlinks to existing EPA web reports available for: EPA PCS, RCRIS, and CERCLIS sites Drinking water systems RAD impaired waters, water quality standards, and no discharge zones

10. SDWIS/FED Query Functionality Tabs of interest defined by client Locate public water sources by location, type, size, and violations Check for Clean Water Act (CWA) protection Identify potential upstream point sources of contamination Identify potential nearby point sources of contamination Identify sources drawing from areas with elevated non-point source impacts Find interactions between any of the above

11. Surface Water Protection Areas Looking for potential contaminant risks within protection areas

12. Non-Point Sources Correlating drinking water violations and potential NPS impacts

13. Topographic Maps Aerial Photos Note: The mapped objects (e.g., SWAs and sources) in the topographic and aerial photograph views were rendered for display purposes only and do not represent actual GIS data.

14. System Architecture Integrated with EPA’s WATERS info. system Web browser client (IE or Netscape) Mapping/web server middleware  ESRI ArcIMS 4.0  Microsoft IIS with Active Server Pages  Oracle Net8 and Oracle Objects for OLE Databases  Two separate Oracle databases  Oracle Enterprise Edition 8.1.7 and ArcSDE 8.1.2  Oracle PL/SQL procedures

15. System Architecture Diagram DWMA Oracle ArcSDE IE or Netscape Application Interface (Customized ArcIMS HTML Viewer) ArcIMS Spatial Server WATERS Browser Clients Web and ArcIMS Servers SSL Databases ASP and Custom DLL OO4O ArcIMS Connector Internet Information Server (IIS) ArcIMS Manager Default ArcIMS Servlet ArcIMS Application Server Envirofacts Periodic batch updates RAD IGD Oracle ArcSDE ENVIRO DWMA WATERS ENVIRO OTHER

16. Only accessible on EPA intranet User login validated against database Users authenticated programmatically Sessions timed out after 20 minutes of inactivity All data transfers encrypted through Secure Socket Layer (SSL) ArcIMS map services secured Security for Sensitive EPA Drinking Water Data

17. A simple internet browser can be turned into a powerful mapping and query tool by wrapping a customized ArcIMS HTML viewer with additional frames to build queries Such an interface allows one to easily tap into multiple ArcSDE geodatabases and existing web reports Database level services (e.g., navigation) can be shared and leveraged by multiple applications For more information contact:  Roger Anzzolin, US EPA Anzzolin.Roger@epa.govAnzzolin.Roger@epa.gov  James Sinnott, RTI International jsinnott@rti.orgjsinnott@rti.org Conclusions