Science & Technology
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Nitrogen Modeling and Mapping
Researchers are creating an inventory of nitrogen sources in the U.S. and mapping the movement of nitrogen from its source into the air, water, and land.
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EPA Southeast leaders visited Oak Ridge Reservation NPL Site and signed a Record of Decision
EPA News Release: EPA Southeast leaders visited Oak Ridge Reservation NPL Site and signed a Record of Decision
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Certification for Heavy-Duty (HD) Commercial Trucks and Buses and Onroad HD Engines
Steps for certifying an onroad commercial trucks and buses with EPA.
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Compliance Reporting for Light-Duty Passenger Cars and Trucks
Steps for compliance reporting with EPA for onroad passenger vehicles.
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Compliance Reporting for Heavy-Duty Commercial Trucks and Buses and Onroad Heavy-Duty Engines
Steps for compliance reporting with EPA for onroad commercial trucks and buses.
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Certification for Marine Compression-Ignition (CI) Engines
Steps for certifying marine vessels with EPA.
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Findett Corp. Superfund Site, St. Charles, St. Charles County, Missouri
Sixth Five-Year Review Completed
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Ecosystems Research
EPA's ecosystems research is working to protect ecosystems and the air and water resources that provide numerous benefits for humans and other living things.
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Certification for Non-Electric Motorcycles
Steps for certifying non-electric motorcycles with EPA.
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Chemical Commodities Inc. Superfund Site, Olathe, Johnson County, Kansas
Third Five-Year Review Started
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RFC 23001 & RFR 23001A - N-Methylpyrrolidone (NMP)
B&C Consortia Management, L.L.C. submits on behalf of the N-Methylpyrrolidone Producers Group, Inc. (NMP Producers Group) this RFC related to the final “Risk Evaluation for n-Methylpyrrolidone (2-Pyrrolidinone, 1-Methyl-) issued in December 2020.
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Request for Correction and Reconsideration
request for correction, request for reconsideration, request for correction, request for reconsideration.iqg, epa iqg, information quality, information quality act, data quality act
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Software Release Notes for the Engines and Vehicles Compliance Information System (EV-CIS)
These release notes are applicable across all industry sectors for EV-CIS.
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Engines and Vehicles Compliance Information System (EV-CIS), Documentation for Certification and Fuel Economy Modules in Light-Duty Passenger Vehicles and Trucks
Files for the passenger vehicle module in EV-CIS.
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Checklist for Quality Concerns About Using Data from Other Sources
A step-by-step guide to ensure that secondary data is used in an appropriate manner.
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EPA Request for Correction 12004 (Exhibit E1)
EPA Request for Correction 12004 (Exhibit E1)
California Department of Health: Annual Compliance Report 2009
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Water Quality Standards Regulations: Washington, DC
Information related to Water Quality Standards for Washington, DC.
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Design and Implementation of New Tools for Quality Assurance in Modeling
This guidance is designed to improve quality assurance project plans (QAPPs) for model applications, especially in the Total Maximum Daily Load (TMDL) program.
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Peer Review of 2024 Draft Risk Evaluation for 1,3-Butadiene
1,3-butadiene is undergoing risk evaluation under the Toxic Substances Control Act. EPA is planning a virtual public meeting for the Science Advisory Committee on Chemicals (SACC) to review the draft risk evaluation for 1,3-butadiene in early 2025.
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EPA-Approved Mojave Desert Air District Regulations in the California SIP
Documents and tables containing EPA approved and compiled rules and regulations for the Mojave Desert Air Quality Management District (AQMD) portion of the California State Implementation Plan (SIP).