SDWIS/FED is EPA’s national regulatory compliance database for the drinking water program. It includes information on the nation’s 160,000 public water systems and violations of drinking water regulations. Access aggregated information on all violations r…
Category: Data.
EPA has many data sources available, these cover topics including but not limited to air, climate change, health risks, pollutants and contaminants, waste, and water. The data are downloadable and available through the Environmental Dataset Gateway (EDG).
The 303(d) Listed Impaired Waters program system provides impaired water data and impaired water features reflecting river segments, lakes, and estuaries designated under Section 303(d) of the Clean Water Act. Each State will establish Total Maximum Daily…
This map shows the changes in stream water temperatures in the Chesapeake Bay region from 1960 to 2014. Blue circles represent cooling trends in stream water temperatures, and red circles represent warming trends in stream water temperatures. Data were an…
This figure shows the rate of change in total annual precipitation in different parts of the United States since the early 20th century (since 1901 for the contiguous 48 states and 1925 for Alaska). The data are shown for climate divisions, as defined by …
The Watershed Boundary Dataset (WBD) is a complete digital hydrologic unit national boundary layer that is at the Subwatershed (12-digit) level. It is composed of the watershed boundaries delineated by state agencies at the 1:24,000 scale. Please refer to…
Legacy Eight-Digit Hydrologic Unit boundaries and codes for the United States, Puerto Rico, and the U.S. Virgin Islands.
This web service contains the following state level layers:Ozone 8-hr (1997 standard), Ozone 8-hr (2008 standard), Lead (2008 standard), SO2 1-hr (2010 standard), PM2.5 24hr (2006 standard), PM2.5 Annual (1997 standard), PM2.5 Annual (2012 standard), and…
The Polychlorinated Biphenyls (PCB) Transformer Registration Database tracks geographic and dated information of registered PCB transformers.
Each EPA Regional Office is responsible within its states for the execution of the Agency’s programs. EPA has ten regional offices, each of which is responsible for several states and territories.