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

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 18, 2025 | Last Modified: 2018-10-01T00:00:00.000+00:00
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.

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Earth Science > Oceans > Tides Earth Science > Oceans > Tides > Tidal Currents Earth Science > Oceans > Tides > Tidal Height Earth Science > Oceans > Tides > Tidal Range Earth Science > Oceans > Ocean Waves > Tsunamis Earth Science > Oceans > Coastal Processes > Sea Surface Height Earth Science > Oceans > Coastal Processes > Tidal Height oceanography Continent > North America > United States Of America > Alaska Continent > North America > United States Of America > California Continent > North America > United States Of America > Connecticut Continent > North America > United States Of America > Delaware Continent > North America > United States Of America > District Of Columbia Continent > North America > United States Of America > Florida Continent > North America > United States Of America > Great Lakes Continent > North America > United States Of America > Hawaii Continent > North America > United States Of America > Maine Continent > North America > United States Of America > Massachusetts Continent > North America > United States Of America > New Jersey Continent > North America > United States Of America > New York Continent > North America > United States Of America > North Carolina Continent > North America > United States Of America > Oregon Continent > North America > United States Of America > Pennsylvania Continent > North America > United States Of America > Rhode Island Continent > North America > United States Of America > South Carolina Continent > North America > United States Of America > Virginia Continent > North America > United States Of America > Washington Continent > North America > United States Of America Continent > North America Ocean > Atlantic Ocean > North Atlantic Ocean > Caribbean Sea > Puerto Rico Ocean > Atlantic Ocean > North Atlantic Ocean > Caribbean Sea > Virgin Islands Ocean > Atlantic Ocean > North Atlantic Ocean > Bermuda Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Guam Ocean > Pacific Ocean > Central Pacific Ocean > Wake Island Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Marshall Islands Ocean > Pacific Ocean > Central Pacific Ocean > American Samoa In Situ Land-based Platforms > Ocean Platform/Ocean Stations > Coastal Stations In Situ/Laboratory Instruments > Gauges > Tide Gauges NTHMP > National Tsunami Hazard Mitigation Program DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce 1 minute - < 1 hour Daily Climatology Monthly Climatology National Water Level Program U.S. Exclusive Economic Zone Coastal United States Coastal U.S. territories

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