Learn the Issues
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Resources to Promote RRAs and ERPs for CWS that Serve Less than 3,301, non-CWS, and Wastewater Systems
Resources to promote risk and resilience assessments (RRAs) and emergency response plans (ERPs) for community drinking water systems (CWS) that serve less than 3,301, non-CWS, and wastewater systems.
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Hurricane Response
EPA information about preparation, response, and recovery after hurricanes.
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Resources on Public Participation in the Hazardous Waste Permitting and Corrective Action Processes
Guidance describing EPA development of the RCRA Expanded Public Participation Rule to empower communities to become more actively involved in local hazardous waste management
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How Can the Public Participate in the Hazardous Waste Permitting Process?
Overview of the role the public can play in the hazardous waste permitting process.
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Current Open Burning / Open Detonation Facilities
This webpage shows the locations of open burning and open detonation facilities across the United States.
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EPA Region 8 Polychlorinated Biphenyls (PCBs)
EPA Regional implementations and regulations for the processing, distribution, use, cleanup, storage and disposal of PCBs under the Toxic Substances Control Act (TSCA).
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EPA Region 4 Polychlorinated Biphenyls (PCBs)
EPA Regional implementations and regulations for the processing, distribution, use, cleanup, storage and disposal of PCBs under the Toxic Substances Control Act (TSCA).
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Do quantities in co-located vessels have to be aggregated for worst-case release scenarios?
Pursuant to the risk management program (RMP) regulations, a facility owner or operator must conduct an off-site consequence analysis that includes modeling of a worst-case release. If a single process is comprised of several co-located vessels, must the total quantity in all the vessels be aggregated to determine the worst-case…
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Ammonia (concentration 20% or greater) and Ammonia (anhydrous) Alternative Release Scenarios
Pursuant to the Risk Management Program regulations, the owner or operator shall identify and analyze at least one alternative release scenario for each regulated toxic substance held in a Program 2 or Program 3 process above its threshold (40 CFR §68.28). If a facility has both ammonia and ammonia (anhydrous)…
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For toxic endpoints, are milligrams per liter (mg / L) equivalent to parts per million (ppm)?
The endpoint concentrations for regulated toxic substances under the risk management program rule (40 CFR Part 68 Appendix A) are listed in units of milligrams per liter (mg/L). Is this equivalent to parts per million (ppm)? No, mg/L is not always equivalent to ppm. Whereas ppm is a volume-to-volume or…
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ICYMI: Across the Board Coverage of the Trump EPA’s Proposal to Save American Truckers Billions and Remove DEF Deratements Entirely
Last week, at the Great American State Fair on the National Mall, EPA Administrator Lee Zeldin unveiled a proposal to reverse the unattainable 2023 NOx emission reduction provisions created under the Biden Administration.
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Volunteer Monitoring Presentations and Recordings
Past presentations given for the Volunteer Monitoring Workgroup.
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Meaningful and Achievable Steps You Can Take to Reduce Your Risk
Discover meaningful steps you can take to reduce PFAS health risks.
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Increasing Our Understanding of the Health Risks from PFAS and How to Address Them
Learn how EPA is increasing understanding of the health risks from PFAS and how to address them.
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Our Current Understanding of the Human Health and Environmental Risks of PFAS
Learn about EPA's current understanding of the health risks of PFAS.
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PFAS Resources, Data and Tools
Review a list of EPA data and tools that include PFAS-related information.
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EPA's Coral Reef Partners
Coral reefs are among the most biologically diverse and valuable ecosystems on Earth. This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them.
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What EPA is Doing to Protect Coral Reefs
Coral reefs are among the most biologically diverse and valuable ecosystems on Earth. This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them.
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Water Quality Standards Regulations: Idaho
Information related to Water Quality Standards for Idaho.