Learn the Issues

Basic Information on Nutrient Pollution

Learn more about nutrient pollution and the challenges associated with it.

Technical Information for Reporting Data

This page is the landing page for ECMPS.

Data & Tools

List of the major data tools and resources used by the Clean Air Markets Programs.

ECMPS Reporting Instructions

Learn how to submit and report to EPA a monitoring plan, QA certification test, and monitored emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), carbon dioxide (CO2) and mercury (hg).

Emissions Monitoring and Reporting

Learn how to provide complete and accurate monitoring, reporting, and auditing of sulfur dioxide (SO20, carbon dioxide (CO2), nitrogen oxide (NOx), and mercury (Hg) emissions.

Clean Air Markets API Portal

Clean Air Markets Application Programming Interface (API) developer documentation

CDX Registration for EASEY

This page provides a guide to the CDX registration process for the EASEY program service for access to CBS and ECMPS 2.0.

Power Sector Data

List of the major power sector emissions data, tools, and resources used by the Clean Air Markets Programs.

Overview of the CCL 6 Approach

Contains a brief summary of the three-step process used to select CCL 5 contaminants.

Air Monitoring Methods - Criteria Pollutants

Information describing EPA’s federally approved air monitoring methods

April 21 Community Meeting for Chevron Questa Mine Superfund Site

EPA, with NMED and NMEMNRD, will provide an update on current site activities and future cleanup work at the Questa Mine.

Date: April 21, 2026

Building Bridges: EPA’s First Visit to the Lumbee Tribe Connects Senior Leaders with Chairman John Lowery

Release Date: April 2, 2026

Photos of Lakes Before and After Algal Blooms

Nutrient pollution can cause algal blooms that are sometimes toxic and always unsightly. The photos on this page show lakes and ponds around the country that have been impacted by this environmental problem.

Risk-Screening Environmental Indicators (RSEI) Model

The Risk-Screening Environmental Indicators (RSEI) model is a computer-based screening tool that analyzes factors that may result in chronic human health risks and calculates various scores.

US EPA SmartWay License Agreement

This SmartWay Tractor and Trailer trademark license agreement is for manufacturers who intend to display the SmartWay designated logo (brand) in the interior of eligible trucks and trailers (e.g. having met the SmartWay specifications established by EPA).