Laws & Regulations
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Stationary Gas and Combustion Turbines: New Source Performance Standards (NSPS)
learn about the NSPS rules for stationary gas turbines by reading the rule summary, rule history, docket additional documents, and economic and regulatory impact analyses.
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Hazardous Waste Test Methods / SW-846
The Resource Conservation and Recovery Act Test Methods for Evaluating Solid Waste: Physical/Chemical Methods (SW-846) provide guidance to analytical scientists, enforcement officers and method developers across a variety of sectors.
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Risk Management Program (RMP) Reconsideration Final Rule Q&A
Risk management programs, which consist of a hazard assessment, a prevention program, and an emergency response program; must be periodically audited to assess whether the plans are adequate or need to be revised to comply with the regulation.
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Report: Evaluation of the U.S. Virgin Islands’ Capacity to Manage and Use Infrastructure Investment and Jobs Act Funds for Clean Water and Drinking Water Infrastructure Improvements
Evaluation of the U.S. Virgin Islands’ Capacity to Manage and Use Infrastructure Investment and Jobs Act Funds for Clean Water and Drinking Water Infrastructure Improvements
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Regulated MS4 in Massachusetts Communities
Information and documents for the Regulated MS4 in Massachusetts
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Final Action Project Aggregation
Final Action on project aggregation reconsideration
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Learn About Nitrogen Dioxide Designations
Basic information about Nitrogen Dioxide Designations
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Lead Designations - Kansas State Recommendations and EPA Responses
Lead Designations - 2008 Standards. Kansas State Recommendations and EPA Responses, Round 1 and 2
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2015 Ozone Standards - EPA Intended Area Designations for Other Tribes
EPA letters to tribes impacted by designations for the 2015 ozone standards
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Commonwealth of the Northern Mariana Islands National Pollutant Discharge Elimination System (NPDES) Permits
NPDES water permits pending and issued in the Pacific Island territory of the Commonwealth of Northern Mariana Islands (CNMI).
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Nevada National Pollutant Discharge Elimination System (NPDES) Permits
In Nevada, EPA’s Pacific Southwest (Region 9) issues all NPDES permits for any discharges on tribal lands. All other NPDES permits are issued by the Nevada Division of Environmental Protection (NDEP).
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Hawai'i National Pollutant Discharge Elimination System (NPDES) Permits
EPA's Pacific Southwest (Region 9) issues all NPDES permits for any discharges into federal ocean waters in Hawai'i. All other NPDES permits are issued by the Hawai'i Department of Health.
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California (Non-Tribal) National Pollutant Discharge Elimination System (NPDES) Permits
EPA’s Pacific Southwest (Region 9) issues NPDES permits for any discharges into federal ocean waters. All other permits are issued by the California Environmental Protection Agency (CalEPA).
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California Tribal Lands National Pollutant Discharge Elimination System (NPDES) Permits
EPA’s Pacific Southwest (Region 9) issues all NPDES permits on tribal lands in California and for any discharges into federal ocean waters (for these permits, see: California NPDES Permits).
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Guam National Pollutant Discharge Elimination System (NPDES) Permits
NPDES water permits issued in the Pacific Island territory of Guam.
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Navajo Nation National Pollutant Discharge Elimination System (NPDES) Permits
EPA’s Pacific Southwest (Region 9) issues all NPDES permits on Navajo Nation tribal lands.
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Arizona Tribal Lands National Pollutant Discharge Elimination System (NPDES) Permits (Excluding Navajo Nation)
In Arizona, EPA's Pacific Southwest (Region 9) issues all NPDES permits for discharges on tribal lands. All other permits are issued by the Arizona Department of Environmental Quality.
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Frequent Questions about e-Manifest
Frequently Asked Questions (FAQ) about e-Manifest covering these areas: scope, generators, receivers, manifest preparation & brokers, federal and state implementation, fee obligations, record retention, data policy, data correction, and user registration.
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Texas SIP Background Information
Texas SIP Background Information