Science & Technology

Metadata DEM

USGS 300 Meter Resolution, 1-Degree Digital Elevation Models (DEM) for CONUS, Alaska, Hawaii, Puerto Rico, and the U.S. Virgin Islands

Metadata Reach File 1

Metadata US Reach File 1 (RF1) for the Conterminous United States in BASINS

WASP

WASP is maintained through this website.

Metadata Permit Compliance System (PCS)

EPA/OW Permit Compliance System for BASINS Version 3 in CONUS

Metadata Urbanized Areas

1990 Tiger Urbanized Areas / Polygons for CONUS, Alaska, and Hawaii in BASINS

This SOP should be followed by LSASD Field Services Branch staff when collecting water samples for algal analyses performed by the LSASD Algal Laboratory, including chlorophyll a, algal growth potential tests (AGPT), and algal toxins.

Meeting Materials for the November 28-29, 2017 Scientific Advisory Panel

Meeting Materials for the November 28-30, 2017 Scientific Advisory Panel on Continuing Development of Alternative High-Throughput Screens to Determine Endocrine Disruption, Focusing on Androgen Receptor, Steroidogenesis, and Thyroid Pathways.

Metadata EPA Regional Boundaries

USEPA Regional Boundaries in the United States for BASINS

Metadata (GIRAS)

1:2500 Scale Quadrangles of Land use / Land cover GIRAS Spatial Data of CONUS in BASINS

Documents Associated With the PFAS Advance Notice of Proposed Rulemaking

This page contains documents related to the PFAS rulemaking for the OCPSF category.

Metadata Ecoregions

Level III Ecoregions of the Conterminous United States in BASINS

Policy and Technical Guidance

EPA provides information on voluntary mobile source emission reduction policies when innovative strategies are used to reduce air pollution from cars, trucks and other transportation sources.

Certification Materials for Marine SI Engines/Equipment

Use these tutorials as part of certification for nonroad spark-ignition engines.

Certification Materials for Nonroad Spark-Ignition (NRSI) Evaporative Components/Equipment

Use these files for nonroad evaporative certification in EV-CIS.

Heavy-Duty Vehicle Certification Tutorial

Covers certification and compliance regulations for HD vehicles and engines; EV-CIS registration process, CDX roles, GEM, input data set, modeling data, tire data, certification documents, warranty, certification requests, annual compliance reporting, ABT.