Surface-water

Suspended sediment from Lake Okeechobee might be a source of nutrients that helps trigger the growth and development of harmful algal blooms in the Caloosahatchee and St. Lucie Rivers.

Reservoirs provide most of the water supply for Puerto Rico. Most of them were constructed in the early and middle 20th century and sediment accumulation has significantly reduced their original storage capacity. The U.S. Geological Survey (USGS) has been conducting a series of bathymetric surveys using a global positioning system (GPS) and a geographic information system (GIS) technology on the...

Webcams have been installed at several real-time stream-gaging sites. The webcams provide valuable information to the National Weather Service, emergency managers, and area residents to evaluate real-time conditions in river environments during storms. The visual record of flooding and other river events also provides valuable research data for the USGS. Many of these webcam installations are part...

The U.S. Geological Survey provides local and national web-based tools so that policy makers and the public can easily access the information they need to enhance preparedness, response, and resilience.

These pages provide access to water-resources data collected at approximately 1.9 million sites in all 50 states, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American Samoa and the Commonwealth of the Northern Mariana Islands. Online access to this data is organized around the categories listed at the bottom. The USGS investigates the occurrence, quantity, quality...