Skip to main content

Monitoring location Thunder Bay (Lake Huron Site T-PH-3) NR Alpena, MI - USGS-450237083243301

Urgent for you to know:

  • Due to a lapse in government funding, the majority of USGS websites will not be updated except to provide important public safety information. Websites displaying real-time water data will be updated with limited support. For more information please see: www.doi.gov/shutdown.