GIS for State and Local Government Asset Management Series

GIS for On-site Waste Water Engineering and Design

Geographic Information Systems (GIS) are used by local governments for managing onsite wastewater systems. GIS is a powerful tool that can help local government agencies in various ways, including the planning, monitoring, and management of onsite wastewater (such as septic systems) in a given area. Here’s how GIS can be effectively utilized in this context:

• Mapping and Inventory: GIS can be used to create detailed maps of existing onsite wastewater systems, including their location, type, and status. This helps in maintaining an accurate inventory which is crucial for effective management and regulation.
• Risk Assessment: By integrating environmental data such as soil types, water table levels, and proximity to water bodies with the locations of wastewater systems, GIS can help in assessing the risk of contamination and prioritizing areas for inspection or intervention.
• Regulation and Compliance: Local governments can use GIS to monitor compliance with environmental regulations. By tracking the age and condition of systems alongside regulatory requirements, GIS can help identify systems that may need inspection or upgrades.
• Planning and Development: GIS data can assist planners and engineers in determining suitable locations for new onsite wastewater systems based on environmental constraints and existing infrastructure. This planning can help prevent future issues and ensure sustainable development.
• Public Health Monitoring: GIS can link onsite wastewater data with public health information to monitor potential health issues, such as outbreaks related to waterborne pathogens that could be associated with failing systems.
• Education and Outreach: Local governments can use GIS data to educate the public about the importance of proper maintenance of onsite wastewater systems through targeted outreach programs, particularly in high-risk areas.