Learn the Issues
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Impaired Waters and TMDLs in Region 2
Information about water resources and impaired water programs of Region 2.
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2019 Aquarius Project Compendium
The Drinking Water State Revolving Fund Aquarius Recognition Program nationally recognizes DWSRF-funded projects
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Clean Water State Revolving Fund (CWSRF) Allotments of Federal Funds to States
Each year Congress appropriates federal funds for the CWSRF program. The tables show the amount of federal funds received by, or allotted to, each state.
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Section 7: Targets
Learn about targets, the third factor category in the HRS pathway score equation. Targets are the people, resources, or sensitive environments that could be affected by the site.
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Sargassum Inundation Events (SIEs): Impacts on Human Health
Sargassum Inundation Events (SIEs): Impacts on Human Health
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Energy Efficiency in Affordable Housing
The guide describes energy, environmental, and economic benefits of energy efficiency in affordable housing and numerous ways.
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EPA, Delaware Department of Agriculture, Renew Pledge to First State Farming, Environmental Health with Memorandum of Understanding
DOVER, Del. (April 14, 2026) — U.S. Environmental Protection Agency (EPA) and the Delaware Department of Agriculture (DDA) renewed their shared goals of well-managed sustainable farms that produce food for our communities and a clean environment
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Information about Renewable Fuel Standard for Landfill Gas Energy Projects
LMOP provides basic information about EPA’s Renewable Fuel Standard and Renewable Identification Numbers.
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Clean School Bus (CSB) Reports to Congress
Reports to Congress highlighting the milestones of the Clean School Bus (CSB) Program.
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Definition of "environment"
How is the term "environment" defined? CERCLA section 101(8) defines "environment" as "(A) the navigable waters, the waters of the contiguous zone, and the ocean waters of which the natural resources are under the exclusive management authority of the United States under the Fishery Conservation and Management Act of 1976…
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Choosing the chemical name to list on the List of Hazardous Substances
How does EPA choose the chemical name(s) to list for each substance on the List of Hazardous Substances at Table 302.4 of 40 CFR 302.4? A single chemical may often be known by several different names. To avoid confusion, the Agency has limited the chemical names listed in 40 CFR…
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Definition of "release"
How is the term "release" defined? CERCLA section 101(22) defines "release" as any "...spilling, leaking, pumping, pouring, emitting, emptying, discharging, injecting, escaping, leaching, dumping, or disposing into the environment (including the abandonment or discarding of barrels, containers, and other closed receptacles containing any hazardous substance or pollutant or contaminant)...."
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Determining quantities / concentrations of hazardous constituents released in waste stream
Are facilities required to determine the quantities or concentrations of hazardous constituents released within a waste stream that is listed under CERCLA? No. The determination of the exact quantities of hazardous substances released in a mixture, solution, or waste stream may be difficult; such a determination is not required by…
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Who must be notified of a release under EPCRA?
Who must be notified of a release under Emergency Planning and Community Right-to-Know Act (EPCRA)? The notice required by section 304 of EPCRA is to be given by the owner or operator of a facility (by telephone, radio, or in person) immediately after the release of a CERCLA hazardous substance…
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Who must be notified of a release under CERCLA?
Who must be notified of a release under CERCLA? One call to the NRC fulfills the requirement to report releases of hazardous substances under CERCLA and several other regulatory programs, including those under the Clean Water Act (CWA) section 311, Resource Conservation and Recovery Act (RCRA), and the U.S. Department…
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Who is the owner or operator for purposes of EPCRA 304 release reporting?
Who is the owner or operator? EPCRA section 304 allows either the owner or operator of a facility to give notice after a release. Owners and operators may make their own arrangements concerning which party is to provide release notification; however, under EPCRA section 304 both the owner and operator…
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What items are covered by the term "rolling stock"?
The definition of "facility" under EPCRA Section 329 states that "(f)or purposes of Section 304, term [i.e., facility] includes motor vehicles, rolling stock, and aircraft." The term "rolling stock" is not defined further. For purposes of EPCRA Section 304, what items are covered by the term "rolling stock"? The term…
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Waste streams and the mixture rule
Where there are several waste streams with the same identification number, is it sufficient to know the average quantities, or the maximum observed quantity, of hazardous constituents of the waste streams in order to apply the mixture rule to all of them? No. The mixture rule provision applies only to…
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Reportable release time period
Over what time period must a Reportable Quantity (RQ) of a hazardous substance be released for that release to be reportable? EPA has stated that the period during which the person in charge must measure whether an RQ or more has been released is 24 hours. Reporting must occur immediately…
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Tests to determine RCRA characteristic of toxicity
What tests can be used to determine whether a waste exhibits the Resource Conservation and Recovery Act (RCRA) characteristic of toxicity? In 1990, EPA replaced the extraction procedure test for determining whether wastes exhibit the toxicity characteristic with the toxicity characteristic leaching procedure (TCLP). Currently, a waste is considered toxic…