CO-OPS Water Level Data from the Coastal Tide Gauge and Great Lake Water Level Network of the United States and US Territories

The Center for Operational Oceanographic Products and Services (CO-OPS) of the National Ocean Service (NOS), an organizational element of NOAA, operates and maintains a network of approximately 200 long-term National Water Level Observation Network (NWLON) stations as part of the National Water Level Program (NWLP) for the United States coasts and in the Great Lakes. CO-OPS also installs and operates short-term water level stations in support of a variety of programs including hydrographic surveys, marine boundary determination, tidal predictions, habitat restoration, dredging, climate change, and long-term sea level rise studies. The data collected and predictions derived are used to ensure safe,efficient, and environmentally sound maritime commerce, environmental assessment, and hazard mitigation. CO-OPS provides a set of water level products required by NOAA's National Weather Service (NWS) to meet flood and tsunami warning responsibilities. Included in this water level collection are preliminary 1-minute, preliminary 6-minute, verified 6-minute, verified hourly, verified highs and lows, verified daily means, and verified monthly mean water levels.