Your comprehensive guide to watershed mapping and delineation tools for US residents
Whether you’re a homeowner curious about your local water connections, a community leader planning resilience projects, or simply someone who wants to understand their environmental footprint, these tools will help you explore and understand your watershed. We’ve organized them from most user-friendly to more advanced.
Image available as a high resolution map: https://imgur.com/user/Fejetlenfej
Quick Reference: Watershed Tools Comparison
US Watershed Tools
This table summarizes tools to help you find your watershed in the U.S. All links are verified as of February 2026.| Tool Name | Tool Publisher | Notes |
|---|---|---|
| How’s My Waterway | US EPA | Mobile-friendly tool providing quick watershed overview, water quality conditions, and community-scale information. Best entry point for beginners. No registration required. |
| Model My Watershed | Stroud Water Research Center | Interactive watershed modeling tool allowing boundary selection at multiple scales (HUC-8, 10, 12), runoff simulation, and scenario comparison. Excellent educational features and tutorials. |
| USGS StreamStats | US Geological Survey | Gold standard for precise watershed delineation. Click any point to get exact drainage boundaries, detailed basin characteristics, flow statistics. Downloadable data in multiple formats. |
| EPA WATERS GeoViewer | US EPA | Comprehensive water data integration with upstream/downstream tracing, watershed reports, water quality databases, and monitoring data links. Professional-grade analysis capabilities. |
| WATERS GeoViewer 2.0 | US EPA | Advanced version with sophisticated spatial analysis, custom map creation, multiple dataset integration, and GIS export capabilities. For professional water resource analysis. |
| USGS National Map Advanced Viewer | US Geological Survey | Multi-purpose federal mapping platform with high-resolution topographic maps, elevation data, detailed stream networks, and historical imagery comparison. |
| StreamStats Batch Processing Tool | US Geological Survey | Processes multiple watershed points simultaneously. Upload coordinate files to receive batch watershed delineations and characteristics. Ideal for researchers working with multiple sites. |
| DWMAPS | US EPA | Specialized tool for drinking water source protection. Identifies contamination sources and protection priorities within drinking water watersheds. For water utility professionals. |
| WikiWatershed Toolkit | Stroud Water Research Center | Educational suite including Model My Watershed, monitoring apps, and citizen science tools. Comprehensive resources for students, educators, and community watershed groups. |
| Water Quality App | Stroud Water Research Center | Mobile app for field water quality data collection and citizen science. Allows users to contribute monitoring data to watershed databases and community science projects. |
| Indiana HUC Finder | Purdue University | State-specific tool for Indiana showing 8, 10, and 12-digit HUC boundaries. Also displays older 11 and 14-digit HUCs. Simple interface for finding Indiana watershed addresses. |
| Virginia Watershed Address Tool | Virginia Department of Conservation and Recreation | Virginia-specific watershed information with detailed explanation of hydrologic units, Virginia National Watershed Boundary Dataset, and state watershed geography. |
Beginner-Friendly Tools
How’s My Waterway (USEPA)
Best for: Quick watershed overview and water quality information
Website: mywaterway.epa.gov
This USEPA tool provides the easiest entry point for understanding your local watershed. Simply enter your address or ZIP code to see water quality conditions, identify local waterbodies, and understand environmental challenges in your area. The mobile-friendly interface shows information at community, state, and national scales.
Key Features:
- Community-level watershed information
- Water quality assessments for swimming and fishing
- Information about restoration projects in your area
- Drinking water source information
- No registration required
Model My Watershed (Stroud Water Research Center)
Best for: Interactive watershed exploration and basic modeling
Website: modelmywatershed.org
This powerful yet user-friendly tool lets you analyze real land use data, explore different watershed scales (HUC-8, HUC-10, HUC-12), and even model stormwater runoff. Created by the Stroud Water Research Center, it’s designed for citizens, educators, and community leaders.
Key Features:
- Interactive watershed boundary selection
- Land use and soil data analysis
- Runoff simulation for different storm scenarios
- Conservation scenario comparison
- Educational resources and tutorials
- Saved projects (with free registration)
Intermediate Tools
USGS StreamStats
Best for: Detailed watershed delineation and basin characteristics
Website: streamstats.usgs.gov
StreamStats is the gold standard for precise watershed delineation. With this USGS tool you can click any point on a stream and instantly see the exact watershed boundary that drains to that location, plus detailed statistics about that basin.
Key Features:
- Precise watershed boundary delineation
- Detailed basin characteristics (area, slope, land use)
- Flow statistics and flood frequency estimates
- Downloadable data in multiple formats (shapefile, KML, GeoJSON)
- State-specific customization
- Batch processing tool for multiple locations
USEPA WATERS GeoViewer
Best for: Water quality data integration and upstream/downstream analysis
Website: epa.gov/waterdata/waters-geoviewer
This comprehensive mapping tool integrates multiple water-related datasets and traces connections upstream and downstream from any point. It’s particularly useful for understanding water quality impacts and regulatory information.
Key Features:
- Upstream and downstream network tracing
- Watershed delineation with detailed reports
- Integration with USEPA water quality databases
- Links to monitoring data and permits
- StreamCat environmental data integration
- Interactive watershed reports
Advanced Tools
WATERS GeoViewer 2.0
Best for: Professional water resource analysis and multi-layered data exploration
Website: USEPA WATERS GeoViewer 2.0
The advanced version of EPA’s watershed tool offers sophisticated analysis capabilities for water resource professionals and serious watershed researchers. Includes extensive datasets and analytical capabilities.
Key Features:
- Advanced spatial analysis tools
- Multiple environmental dataset integration
- Custom map creation capabilities
- Professional-grade watershed reporting
- Export capabilities for GIS applications
USGS National Map Advanced Viewer
Best for: Detailed topographic analysis and multi-purpose mapping
Website: apps.nationalmap.gov/viewer
This comprehensive mapping platform provides access to numerous federal datasets useful for watershed analysis, including detailed topographic maps, elevation data, and hydrographic features.
Key Features:
- High-resolution topographic maps
- Elevation and slope data
- Detailed stream network data
- Historical imagery comparison
- Professional data download options
Specialized Tools
DWMAPS (EPA Drinking Water Mapping Application)
Best for: Source water protection and drinking water watershed analysis
Website: EPA DWMAPS
Specifically designed for drinking water professionals and source water protection, this tool helps identify potential contamination sources and protection priorities within drinking water watersheds.
StreamStats Batch Processing Tool
Best for: Processing multiple watershed locations simultaneously
Website: streamstats.usgs.gov/batching
Allows users to upload multiple points and receive watershed delineations and characteristics for all locations in a single batch process—ideal for researchers or planners working with multiple sites.
Mobile and Educational Tools
WikiWatershed Toolkit
Best for: Educational watershed exploration and citizen science
Website: wikiwatershed.org
A comprehensive suite of watershed education tools including Model My Watershed, monitoring apps, and educational resources designed for students, educators, and citizen scientists.
Water Quality App (Stroud Water Research Center)
Best for: Field data collection and watershed monitoring
Mobile app available through WikiWatershed platform
Allows users to collect and share water quality data from their local watersheds, contributing to citizen science efforts and watershed monitoring networks.
Getting Started: Which Tool Should You Use?
- Just curious about your watershed? Start with How’s My Waterway for a quick overview, then explore Model My Watershed for more detailed information.
- Need precise boundaries? Use USGS StreamStats for the most accurate watershed delineation and detailed basin characteristics.
- Researching water quality issues? EPA WATERS GeoViewer provides the most comprehensive water quality data integration.
- Working on multiple locations? The StreamStats Batch Processing Tool can handle multiple points efficiently.
- Teaching or learning? Model My Watershed and the WikiWatershed Toolkit offer the best educational resources and interactive features.
Tips for Success
Before You Start:
- Have your specific address or coordinates ready
- Consider what level of detail you need (neighborhood vs. regional)
- Think about whether you need data you can download and use elsewhere
While Using the Tools:
- Try multiple tools to get different perspectives on your watershed
- Pay attention to the different scales (HUC-8, HUC-10, HUC-12) offered
- Save or bookmark your results for future reference
- Take advantage of tutorial resources when available
After Getting Results:
- Cross-reference results between tools to verify boundaries
- Look for local watershed groups or organizations in your area
- Consider how you might use this information for practical decisions
- Share your watershed address with others to build awareness
Understanding your watershed is the first step toward making informed decisions about water use, flood preparedness, and environmental stewardship. These tools put professional-grade watershed analysis capabilities at your fingertips, empowering you to understand and protect the water systems that sustain your community.
Want to learn more about watersheds? Read our blog post Do You Know Your Watershed? for a complete guide to understanding your watershed connections.
High resolution digital print: wEtsy: River Basins of the US in Rainbow Colours
