National Water Quality Laboratory & Biological Group :

• NWQL Internal Homepage
• NWQL Public Homepage
• Invertebrate Sample Processing Protocols
• Invertebrate Sample Shipping Address

  U.S. Geological Survey
  National Water Quality Laboratory
  P.O. Box 25608, MS 407
  Building 95, Entrance E3
  Denver Federal Center
  Denver, Colorado 80225-0608

• Biological Group Contacts
  • Jeff Cahil, Supervisory Chemist
    (jdcahill@usgs.gov; 303-236-3256)
  • Scott Grotheer, Biologist
    (sagrothe@usgs.gov; 303-236-3486)
  • Rob Hood, Biologist
    (rwhood@usgs.gov; 303-236-3485)