First posted July 10, 2023 For additional information, contact: Water Mission AreaU.S. Geological Survey12201 Sunrise Valley DriveReston, VA 20192Email: [email protected] The “National Field Manual for the Collection of Water-Quality Data” (NFM) provides guidelines and procedures U.S. Survey (USGS) personnel who collect data used to assess quality Nation’s surface-water groundwater resources. This c...