Water Quality Information for Oceans, Lakes, and Rivers by State

beach with beach closed sign

Before you plan a visit to any natural body of water, it is important to check on water quality conditions to protect your health and the health of your loved ones. Knowing this information can also save you a trip to a swim area that may be closed due to health risks or water safety reasons.

Browse your state’s information below to find out more on water quality advisories, beach monitoring, water quality programs, and harmful algal bloom monitoring resources.

New Hampshire

Other Jurisdictions

Northern Mariana Islands
Virgin Islands