Science & Technology

Retrospective Case Studies Fact Sheet

Science in Action Fact Sheet: Overview of Retrospective Case Studies for EPA's Hydraulic Fracturing Study

Modeling of fault activation and seismicity by injection directly into a fault zone associated with hydraulic fracturing of shale-gas reservoirs

LBNL, in consultation with the EPA, expanded upon a previous study by injecting directly into a 3D representation of a hypothetical fault zone located in the geologic units between the shale-gas reservoir and the drinking water aquifer.

Scientific contaminant studies in the Salish Sea

Listing of some of the scientific contaminant studies conducted in the Salish Sea.

Federal Geospatial Resources

Find links to Geospatial data curated by additional agencies

EPA Geospatial Strategic Plan

This page provides access to the EPA Geospatial Strategic plan for Fiscal Year (FY) 2023 - 2027. This plan provides direction and guidance for the EPA Geospatial Program to identify priorities that support the Agency's mission now and in the future.

Science Careers at EPA

From geology to mechanical engineering, from biology to chemistry, EPA is looking for scientists, technologists and engineers to perform cutting-edge research to help make this a cleaner, more sustainable world.

Exceptional Events Documents Ozone - Pennsylvania

Exceptional Events Documents Ozone - Colorado

Exceptional Events Documents Ozone - Louisiana

Exceptional Events Documents Ozone - Maryland

Water Quality Standards Academy

The Water Quality Standards Academy provides classroom-based and online courses, along with occasional webinars, to support development of water quality standards.

Useful Links When Searching for EPA Documents not yet in the EPA Repository

A collection of links known to provide information relevent to EPA publications, either in the form of metadata or online document content.

HSRB November 18, 2025

Meeting details for the November 18, 2025 HSRB meeting

Lead at Superfund Sites: Software and Users' Manuals

Download software and users' manuals related to models used in lead risk assessment at Superfund sites.

HSCTM2D

Hydrodynamic, Sediment, and Contaminant Transport Model, a finite element modeling system for simulating two-dimensional, vertically-integrated, surface water flow

HSCTM2D Release Notes

Release notes for Hydrodynamic, Sediment, and Contaminant Transport Model, a finite element modeling system for simulating two-dimensional, vertically-integrated, surface water flow

PEST - Surface Water Utilities

Manual on PEST Surface Water Utilities, a series of programs that facilitate the use of PEST (model-independent parameter estimation package) with surface water models. January 2003

A Exercise in Using PEST to Calibrate a Groundwater Model

Exercise to gain experience in using the comprehensive model postprocessing functionality available through Time Series PROCessor (TSPROC) & PEST in calibrating a HSPF model.

PEST - Model-Independent Parameter Estimation Manual (4th Ed.)

A manual for using PEST, a model-independent parameter optimiser, to calibrate models and interpret field and laboratory data. 4th Edition

Power Sector Modeling

Detailed documentation of EPA’s application of the Integrated Planning Model (IPM) to analyze the business-as-usual air emissions projections and incremental impact of policies on the U.S. electric power sector.