Science & Technology

EPA Letter Denying TSCA Section 21 Petition

Letter denying TSCA Section 21 petition requesting EPA to regulate Anthropogenic Emissions Carbon Dioxide.

TSCA Section 21 Petition Requesting EPA to Regulate Cadmium in Consumer Products, Especially Toy Metal Jewelry

This petition requests EPA to require producers, importers, and processors of cadmium and cadmium compounds to provide health and safety reporting.

EPA Response to TSCA Section 21 Petition

This document provides the reasons for EPA’s denial of a petition it received under section 21 of the Toxic Substances Control Act (TSCA).

TSCA Section 21 Petition to Prohibit the Use of Hydrofluorosilicic Acid (HFSA) as a Water Fluoridation Agent

This petition requested that EPA take action under section 6 of the Toxic Substances Control Act (TSCA) to prohibit the use of hydrofluorosilicic acid (HFSA) as a water fluoridation agent.

TSCA Section 21 Petition Requesting EPA to Promulgate TSCA Section 4 and 8 Rules Concerning Oil and Gas Exploration and Production Chemicals and Mixtures

This petition requests EPA to promulgate regulations under TSCA Section 4 and 8 rules requiring toxicity testing and reporting of health and safety studies on oil and gas exploration and production chemicals.

CDX Registration Webinar

This webinar provides instruction on how to register in the CDX system.

TSCA Section 21 Petition Requesting EPA to Establish Regulations Prohibiting the Manufacture, Processing, and Distribution in Commerce of Lead Wheel Balancing Weights.

This petition requests EPA to establish regulations prohibiting the manufacture, processing, and distribution in commerce of lead wheel balancing weights (“wheel weights”).

Short-Chain Chlorinated Paraffins (SCCPs) and Other Chlorinated Paraffins Action Plan

A summary of EPA's review of Short-Chain Chlorinated Paraffins (SCCPs) and Other Chlorinated Paraffins.

TSCA Section 8(e) Reporting Guide

This "reporting guide" has been compiled by EPA's Office of Toxic substances (OTS) to assist potential respondents who manufacture, import, process or distribute chemical substances in complying with Section 8(e).

Summary of External Peer Review and Public Comments and Disposition

This document summarizes the public and external peer review comments that the EPA’s Office of Pollution Prevention and Toxics (OPPT) received for the draft work plan risk assessment for n-Methylpyrrolidone (NMP).

OPPT Antimony Trioxide (ATO) Risk Assessment - Draft Comments of Seven-Member Peer Review Panel

Comments on the draft risk assessment for Antimony Trioxide (ATO).

Essential Principles for Reform of Chemicals Management Legislation

The Essential Principles for Reform of Chemicals Management Legislation (Principles) are provided to help inform efforts underway in Congress to reauthorize and significantly strengthen the effectiveness of TSCA.

John Deere Waterloo Works – Drivetrain Operations Facility, Waterloo, Black Hawk County, Iowa - Fact Sheet, May 2020

Proposed Remedy and Permit Modification

Federal Agencies Expand Urban Waterway Revitalization Efforts in Communities Across the Nation

May 10, 2013 Urban Waters Press Release titled "Federal Agencies Expand Urban Waterway Revitalization Efforts in Communities Across the Nation."

John Deere Des Moines Works Facility, Ankeny, Polk County, Iowa - Fact Sheet, June 2022

Public Comment Period for Statement of Basis and Proposed Remedy

CMAQ Publications and Peer Review

Peer-reviewed research that supports or uses CMAQ is documented here.

Download CMAQ

Directions on downloading, building and testing the CMAQ model code are provided. Additional sections include information on further documentation, sources for user support and suggestions on software for model evaluation and visualization.

Download Data

This is the landing page for users interested in downloading CMAQ model input and output.

EPA Response to RFC 23002 - Toxic Substances Control Act (TSCA) Risk Evaluation for 1,4-Dioxane

This page contains the Agency's response to RFC 23002 - Toxic Substances Control Act (TSCA) Risk Evaluation for 1,4-Dioxane

Tribal Air Quality Monitoring

These documents provide guidance to tribes and EPA Regional Offices on how to monitor air quality on tribal lands and create emission inventories.