Science & Technology
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Exceptional Events Documents Ozone - Colorado
Exceptional Events Documents Ozone - Colorado
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Exceptional Events Documents Ozone - Louisiana
Exceptional Events Documents Ozone - Louisiana
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Exceptional Events Documents Ozone - Maryland
Exceptional Events Documents Ozone - Maryland
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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.
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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.
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HSRB November 18, 2025
Meeting details for the November 18, 2025 HSRB meeting
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Lead at Superfund Sites: Software and Users' Manuals
Download software and users' manuals related to models used in lead risk assessment at Superfund sites.
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HSCTM2D
Hydrodynamic, Sediment, and Contaminant Transport Model, a finite element modeling system for simulating two-dimensional, vertically-integrated, surface water flow
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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
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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
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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.
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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
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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.
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Resources for EnviroAtlas Collaborators
Information and document templates to guide the development of data, metadata, widgets, tools and fact sheets.
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The Geography of WATERS
WATERS Geography
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Analysis of the Final Repeal of the Mercury and Air Toxics Standards Amendments
IPM analyses of the Proposed MATS Risk and Technology Review (RTR)
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2025 Reference Case
This area provides information and documentation on EPA’s power sector modeling platform v6, including the associated input data and modeling assumptions, outputs, and documentation.
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Nitrogen Dioxide (NO2 Primary) Air Quality Standards - Documents from Review Completed in 2010
NO2 Primary Documents from Review Completed in 2010
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Lead (Pb) Air Quality Standards - Documents from Review Completed in 2008
Documents from Review Completed in 2008
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Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 1997
Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 1997