FAQ
Frequently asked questions about understanding and interpreting USGS water data
- Social media, apps and widgets
- About maps
- Information about map displays in USGS Water Data for the Nation
- About graphs
- About groundwater
- About output formats
- About site selection criteria
- About sites
- About surface water
- About tab-delimited output
- About the USGS Water Data for the Nation site
- About USGS parameters
- About USGS Water Services
- About using with Microsoft Excel
- About WaterAlert
- About water quality
- About water use
- Additional system background
- Automated retrievals
- Useful tips if you need to get data automatically from this site
- Miscellaneous questions
- About Statistics
