Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The National Water Quality Laboratory (NWQL) maintains the LabHelp (labhelp@usgs.gov) mailbox monitored by the Quality Assurance Section (QAS) and the Login Unit (LU). NWQL customers can use the LabHelp mailbox to submit NWQL-related email questions to laboratory staff.