A map-based query tool with access to Legacy and Modern STORET sampling stations. Using this tool, you can zoom in on any area of the United States, and examine the map for locations of streams, roads, political boundaries, and other features. You can add Legacy or Modern STORET water quality monitoring stations to the map, and select them for downloading data.

MyEnvironment is a powerful map-based tool that provides a wide range of federal, state, and local information about environmental conditions and features in an area of your choice. This application is provided by U.S. EPA in partnership with federal, state and local government and other organizations.

The EPA Substance Registry System (SRS) is a database of names and codes used within EPA and in STORET to represent chemical and biological substances and physical properties of interest to EPA and its partners. Looking for information about a substance? Search by CAS Number, Name, Taxonomic Serial Number, Molecular Formula, Chemical Type, Definition, or Alternate Identifier.

Data Quality Assessment is used to assess the type, quantity, and quality of data in order to verify that the planning objectives, Quality Assurance Project Plan components, and sample collection procedures were satisfied and that the data are suitable for its intended purpose. This link provides the EPA's documentations and tools to assess the data quality.

The Assessment Total Maximum Daily Load (TMDL) Tracking and Implementation System (ATTAINS) provides information reported by the states to EPA about the conditions in their surface waters. This information is required every two years under Clean Water Act Sections 305(b) and 303(d).

The U.S. Environmental Protection Agency, states, and tribes are conducting a series of national aquatic resource surveys. Often referred to as probability-based surveys, these studies report on core indicators of water condition using standardized field and lab methods. The surveys include a national quality assurance program and are designed to yield unbiased, statistically-representative estimates of the condition of the whole water resource (such as rivers and streams, lakes, ponds, and reservoirs, wetlands, etc).

WATERS (Watershed Assessment, Tracking & Environmental ResultS) unites water quality information that was previously available only from several independent and unconnected databases.

Locate Your Watershed and find Watershed Health Information about a place of interest. Watersheds are based on the Hydrologic Unit Code (HUC) scheme developed by the United States Geological Survey, and provide coverage of the continental United States only.

The National Hydrography Dataset is a geospatial database that interconnects and uniquely identifies the "reaches" that comprise the nation's surface water drainage system. It is based upon the content of the USGS DLG integrated with reach-related information from the EPA RF3.

USGS and EPA are working together to provide scientists and policy-makers an easier way to integrate access to their large water-quality databases. A common suite of web services allow for the automated sharing of water monitoring data via a common format and terminology. Initial web services are now available.

Access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, and Puerto Rico. Over (371,126 sites) Field/lab Samples

Access to chemical, biological, and physical water quality data from 42 study units (basins) across the nation.

The National Stream Quality Accounting Network, focused on monitoring the water quality of four of the Nation's largest river systems-- the Mississippi (including the Missouri and Ohio), the Columbia, the Colorado, and the Rio Grande.

The Integrated Taxonomic Information System (ITIS) is a partnership of U.S., Canadian, and Mexican agencies, other organizations, and taxonomic specialists cooperating on the development of an on-line, scientifically credible, list of biological names focusing on the biota of North America.

The Catalogue is published as two products:
• Species 2000 & ITIS Catalogue of Life: Annual Checklist
The Annual Checklist is published each year as a fixed edition.
• Species 2000 & ITIS Catalogue of Life: Dynamic Checklist
The Dynamic Checklist is real time access to the Species 2000 array of 26 online taxonomic databases, less extensive than the Annual Checklist.

USGS and EPA are working together to provide scientists and policy-makers an easier way to integrate access to their large water-quality databases. A common suite of web services allow for the automated sharing of water monitoring data via a common format and terminology. Initial web services are now available.