Data and Tools

NHDPlusV1 South-Atlantic Gulf Data

NHDPlus Version 1 data for the South-Atlantic Gulf vector processing unit.

NHDPlusV1 Pacific Northwest Data

NHDPlus Version 1 data for the Pacific Northwest vector processing unit.

2016 TRI National Analysis Dioxin and Dioxin-like Compounds and TEQ Data Files

Toxic equivalents (TEQs) allow for a better understanding of the toxicity of releases and waste management activities at facilities that report to the TRI Program.

Addressing Water Quality Effects from Hydrologic Alteration and Providing Resilience to Climate Change

EPA has clarified that pollution from hydrologic alteration of rivers, streams, lakes, and estuaries affects water quality. CWA programs can be used to both prevent and restore these impacts and provide resiliency to climate change.

Options for Modernizing Public Hearings for Water Quality Standard Decisions Consistent with 40 CFR 25.5

Provides suggestions for states and WQS-authorized tribes on how they could modernize – that is, incorporate technologies into – their Water Quality Standards (WQS) public hearing process consistent with federal public hearing requirements at 40 CFR 25.5.

South Platte River Contributing Headwater Basins in Colorado

Headwater Basins that contibute to the South Platte River in CO.

Project Resources Needs for Proctor Creek Watershed

Estimated costs for partnership operations and projects in Proctor Creek

South Platte River Basin

Map of South Platte River Basin

Narrative Water Quality Criteria Related to Trash and Plastics

To address the public health problem of trash in our waterways, it is important to first identify and adopt trash criteria and then identify a way to implement such criteria in an effective manner.

2023 Appendix W Proposed Rule

On October 12, 2023, the Administrator signed a propose rule that revises the Guideline on Air Quality Models. This webpage provides the background material related to this proposed rule for stakeholder reference.

National Priorities List (NPL) Sites - by State

View the National Priorities List (NPL), organized by state. Use the interactive map to select a state or territory.

National Priorities List (NPL) Sites - by Site Name

View the National Priorities List (NPL), ordered alphabetically by site name.

National Priorities List (NPL) Sites - by Listing Date

View the National Priorities (NPL), ordered chronologically by listing date.

List 8R Active Site Inventory

View the active Superfund site inventory, at which site assessment, removal, remedial, enforcement, cost recovery, or oversight activities are being planned or conducted.

List 10 - Contaminants at CERCLIS Sites

View a list of contaminants recorded for Superfund sites, including the contaminant Chemical Abstract Service (CAS) number and maximum concentration level.

Lead at Superfund Sites: United States Geological Survey (USGS) Background Soil-Lead Survey

Learn about the USGS background soil-lead survey. Use the interactive map to learn about lead levels in your state.

EPA’s Vintaging Model of ODS Substitutes

EPA’s Vintaging Model (VM) is a “bottom-up” model named for its method of tracking an inventory of the in-use stocks and emissions from annual “vintages” of new equipment containing ODS and ODS substitutes that enter into service.

Clinton River AOC Boundary Map

This page presents various boundary maps of the Clinton River AOC.

RCRA Info Model

Hazardous waste information is contained in the Resource Conservation and Recovery Act Information (RCRAInfo), a national program management and inventory system about hazardous waste handlers.

Envirofacts Model

This website provides access to several EPA databases to provide information about environmental activities that may affect air, water, and land anywhere in the United States.