Try the USGS National Water Information System Web site (NWISWeb). This tutorial includes step-by-step guides for the first-time user of NWISWeb. These guides represent only one way to access some of the data. What is NWISWeb?

Check out the following step-by-step guides:

• What is my watershed address, and how will it help me find USGS data? 
• How to access streamflow data
• How to access water-quality data
  
• What about ground water in my watershed? (not available at this time)
• What about water use in my watershed? (not available at this time)