Learn the Issues
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Air Modeling - Meteorological Guidance
Meteorological guidance for the use of observational data in permit modeling, monitoring for modeling applications, and other related data procedures and quality assurance
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Nitrogen Dioxide/Nitrogen Oxide In-Stack Ratio (ISR) Database
The EPA’s Guideline on Air Quality Models, Appendix W to 40 CFR Part 51, recommends a three-tiered screening approach to estimate ambient concentrations of Nitrogen Dioxide (NO2).
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Air Modeling - Observational Meteorological Data
Observed meteorological data for use in air quality modeling consist of physical parameters that are measured directly by instrumentation, and include temperature, dew point, wind direction, wind speed, cloud cover, cloud layer(s), ceiling height,
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Air Quality Model Clearinghouse
The Model Clearinghouse is a focal point for interpretation of modeling guidance in specific regulatory applications.
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Criminal Press Releases - 2020
This is a list of press releases announcing results of EPA criminal cases adjudicated in U.S. courts for 2019.
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Environmental Crime Victim Resources - Michigan
A resource listing for environmental crime victims
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Environmental Crime Victim Resources - New Jersey
A resource listing for environmental crime victims
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Chemical Mass Balance (CMB) Model
The EPA-CMB Version 8.2 uses source profiles and speciated ambient data to quantify source contributions. Contributions are quantified from chemically distinct source-types rather than from individual emitters.
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Clean Air Act Permitting in Minnesota
Contacts and links for Clean Air Act permitting in Minnesota.
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Spray Sprinkler Nozzles
A spray nozzle is a component of a sprinkler system that combines with a sprinkler body to distribute water on a landscape.
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Review of Federal E-Procurement Systems
An overview on how to improve the integration of sustainability requirements into Federal e-procurement systems, making it easier for procurement officers to fulfill sustainability requirements.
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What Makes a Product "Greener?"
This page explains what attributes makes a greener product.
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EPA's National Security Priorities
Summary of EPA's national security priorities for FY21-22.
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Advancing Safer Chemicals in Products
This document profiles six organizations — from governmental to private-sector to not-for-profit — that take different approaches to screen and restrict products containing toxic chemicals.
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Products in Development
Water-saving product categories and service programs under consideration for development by WaterSense.
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Environmental Considerations in Federal Procurement
This Congressional Research Service Report provides an overview of legal authorities for environmental considerations in federal procurement.
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Performance Specification 6 for Flow Rate
Performance Specification 6 - Specifications and Test Procedures for Continuous Emission Rate Monitoring Systems in Stationary Sources
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Emisiones de óxido de etileno: Preguntas frecuentes
background information on ethylene oxide emitters in Lake County, IL (in Spanish)
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Power Resilience Featured Products
Power Resilience Guide and Power Resilience: An Achievable Goal
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Power Resilience Guide for Water and Wastewater Utilities
This guide helps utilities become more resilient to power outages.