What is the U.S. Integrated Ocean Observing System (IOOS)?

IOOS (the U.S. Integrated Ocean Observing System) is a U.S. government-backed network that observes the ocean, coasts, and Great Lakes. According to its official site, it is "an integrated network of people and technology gathering observing data and developing tracking and predictive tools to benefit the economy, the environment, and public safety at home, across the nation, and around the globe." It is relevant to you if you need authoritative ocean and coastal observation data, regional data portals, or modeling and forecasting resources for U.S. waters.

What IOOS does

IOOS describes itself as "our eyes on the ocean, coasts, and Great Lakes." Its work combines two core functions:

• Gathering observing data — collecting measurements from ocean, coastal, and Great Lakes observing systems.
• Developing tracking and predictive tools — turning that data into tools that support the economy, the environment, and public safety.

The stated beneficiaries are broad: the U.S. economy, the environment, and public safety, both domestically and globally.

Who runs it and how it is organized

IOOS is an official U.S. government website (a .gov domain), and the site notes that .gov websites belong to official government organizations in the United States. Its structure includes:

• The U.S. IOOS Office — with sections for About Us, History, IOOS by the Numbers, Meet the U.S. IOOS Office, Funding Opportunities, Governance & Management, and Certification.
• Regional Associations — the network is organized into regions, each with its own association and data portal.
• Interagency and advisory bodies — including Interagency Partnerships and the IOOS Advisory Committee, spanning global, national, and regional levels.

Regional coverage

IOOS divides U.S. waters into regions, each represented by a regional association:

What you can access

The site organizes its resources into several areas:

• Data Access — IOOS Data, Data Standards & Requirements, and Regional Data Portals.
• Sites & Apps for Mobile Use — mobile-friendly tools.
• IOOS In Action — benefits of ocean observing and a catalog of use cases.
• Coastal and Ocean Modeling Testbed — modeling resources.
• Data Management & Cyberinfrastructure — including HF Radar, Marine Life (Animal Telemetry Network, Marine Biodiversity Observation Network), Harmful Algal Blooms, and Ocean Enterprise.
• Technology — Ocean Technology Transition, QARTOD, and Underwater Gliders (including IOOS Hurricane Glider Coordination).

The site also publishes a document library, an "Eyes on the Ocean" newsletter, and an Ocean Enterprise Opportunities newsletter.

System status and where to check details

The homepage displays a system status of NORMAL. For individual assets and information, the site directs users to ioos.us and/or the Environmental Sensor Map. If you need to confirm whether a specific observing asset is operating, those are the entry points the site itself points to.

Practical starting points

If you are new to IOOS, the most useful paths depend on your goal:

• Looking for data → start with Data Access and the Regional Data Portals.
• Working in a specific region → go directly to that region's association (see table above).
• Interested in a specific topic (e.g., harmful algal blooms, gliders, modeling) → use the corresponding section under Data Management & Cyberinfrastructure or Technology.
• Checking current operational status → use the system status indicator plus ioos.us and the Environmental Sensor Map.