Laws & Regulations
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Clean Air Act Permitting in Hawai'i and Pacific Islands
Information on EPA Pacific Southwest (Region 9) oversight of Clean Air Act (CAA) permitting in Hawai'i and the Pacific Islands.
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Air Permit Delegation and PSD SIP Approval Status in EPA's Pacific Southwest (Region 9)
Federal air regulations that have been delegated to state or local air pollution control agencies in EPA's Pacific Southwest, Region 9.
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About Title V Permitting in Region 9
Part 71 permits in progress or issued by EPA Pacific Southwest, Region 9.
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Six-Year Review of Drinking Water Standards
Learn about EPA's process and outcomes for identifying drinking water standards that may need revision to strengthen public health protection or improve efficiency of implementation.
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CAA Permitting in EPA's Pacific Southwest (Region 9)
Clean Air Act permitting in EPA's Pacific Southwest region, Region 9; serving Arizona, California, Hawaii, Nevada, Pacific Island Territories and 148 Tribal Nations.
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Midsize and Large Drinking Water System Infrastructure Resilience and Sustainability Program
The homepage for the: Midsize and Large Drinking Water System Infrastructure Resilience and Sustainability Program
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Affected States Notifications in EPA's Pacific Southwest
Information about Tribes approved for Treatment as a State (TAS) in EPA's Pacific Southwest (Region 9).
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Drinking Water System Infrastructure Resilience and Sustainability
The homepage for the: Drinking Water System Infrastructure Resilience and Sustainability Program
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Clean Air Act Permitting in California
Information on Clean Air Act Permitting in California and EPA's oversight.
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Good Samaritan Remediation of Abandoned Hardrock Mines Program
An overview of the new Good Samaritan Remediation of Abandoned Hardrock Mines Program
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Frequent Questions on the Phasedown of Hydrofluorocarbons
FAQ for HFC phasedown program
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UIC Permit: PAS2D041BBEA
Columbia Gas underground injection control permit
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HFC Data Hub
Production and consumption of hydrofluorocarbons (HFCs) are being phased down in the United States in accordance with the AIM Act and the Kigali Amendment to the Montreal Protocol.
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Reporting and Recordkeeping Resources
EPA has issued a final rule under the AIM Act to phase down the production and import of hydrofluorocarbons (HFCs).
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Enforcement Response Policy: EPCRA Sections 304, 311, 312, and CERCLA Section 103
The purpose of this Policy is to ensure that enforcement actions for violations of CERCLA 103(a) and EPCRA 304, 311 and 312 are uniform and consistent.
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BPPD Internal Application Checklists
EPA, Office of Pesticide Programs, BPPD internal application checklists for internal guidance to assist BPPD employees in their evaluation of applications submitted to BPPD by applicants and/or registrants.
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TSCA Section 5(a)(3)(C) Determination for Premanufacture Number (PMN) P-19-0134
This document describes EPA's pre-manufacture notice review determination under amended TSCA for P-119-0134.
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Inert Ingredients Approved for Use in Minimum Risk Pesticide Products
List of Inert Ingredients for use in minimum risk pesticide products.
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Envirofacts Privacy Policy
This website provides access to several EPA databases to provide information about environmental activities that may affect air, water, and land anywhere in the United States.
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Label Review Training: Module 4: Applying the Principles of Pesticide Label Review, Page 7
This module of the label review training goes into detail about the four core principles of pesticide label review: clarity, accuracy, consistency with EPA policy, and enforceability.