Learn the Issues
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Area Designations for the 2010 Primary Sulfur Dioxide National Ambient Air Quality Standard - Round 3 - July 2016
This memorandum provides information on the schedule and process for the area designations for the 2010 primary sulfur dioxide standard that must be completed by December 31, 2017.
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Mercury Switch Recovery Program
Renewed memorandum of understanding (MOU) signed on November 15, 2018 by EPA Acting Administrator Andrew Wheeler with the signatories of the National Vehicle Mercury Switch Recovery Program (NVMSRP).
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Climate Adaptation and Ecosystem Protection
EPA works with local, state and tribal governments to protect the complex environmental systems that support natural water resources.
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Fact Sheet: Benefits of Integrating Reuse to Achieve Enforcement and Environmental Protection Goals
Transmittal memo and fact sheet on the benefits of integrating reuse to achieve enforcement and environmental protection goals.
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Guidance: Superfund Liability Protections for Local Government Acquisitions
Guidance document discusses BUILD Act amendments to CERCLA regarding liability protections for state and local government acquisitions and the agency's enforcement discretion policies.
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Southern Wood Piedmont Financial Assurance Settlement
Overview of the settlement for Southern Wood Piedmont Company which includes a $317
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Superfund Cost Recovery
Overview that provides information on Superfund cost recovery.
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Superfund "Notice of Liability" Letters
Site that explains the two types of notice letters to communicate with potentially responsible parties in the superfund enforcement process.
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Defenses to and Exemptions from Superfund Liability
Describes defenses and exemptions to Superfund liability enforcement.
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Drinking Water State Revolving Fund Program Information for the State of Indiana
Federal and State investments for Drinking Water Programs for the state of Indiana
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Health and Environmental Effects of Particulate Matter (PM)
Particles less than 10 micrometers in diameter pose the greatest problems, because they can get deep into your lungs, and some may even get into your bloodstream. Fine particles (PM2.5) are the main cause of reduced visibility (haze).
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Status of EnviroAtlas
Where are we now? What updates have we made recently? What planned updates are in store?
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Pesticides' Impact on Indoor Air Quality
According to a recent survey, 75 percent of U.S. households used at least one pesticide product indoors during the past year. Products used most often are insecticides and disinfectants.
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TMDL Foundations Training
The objective of the Total Maximum Daily Load Foundations training course is to introduce basic TMDL concepts and enable participants to understand the process for developing TMDLs.
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Basic Information about Visibility
Visibility - Basic Information
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Patient Exposure and the Air Quality Index
Patient Exposure and the Air Quality Index
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Patient Exposure and High Particle Pollution Events
Patient Exposure and Extreme Pollution Events
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Should You Have the Air Ducts in Your Home Cleaned?
Duct cleaning generally refers to the cleaning of various heating and cooling system components of forced air systems, including the supply and return air ducts and registers, grilles and diffusers, heat exchangers heating and cooling coils.
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Nitrogen Dioxide's Impact on Indoor Air Quality
The two most prevalent oxides of nitrogen are nitrogen dioxide (NO2) and nitric oxide (NO). Both are toxic gases with NO2 being a highly reactive oxidant and corrosive. The primary sources indoors are combustion processes.
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Where Combined Sewer Overflow Outfalls Are Located
Overview of combined sewer overflows (CSO), guidance, and policies.