Laws & Regulations
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Revised Sediment TMDL for the Indian Creek Watershed in Montgomery County, Pennsylvania
Documents, files, and information regarding the revised sediment TMDL for the Indian Creek Watershed. Montgomery County, Pennsylvania.
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Listing Waters Impaired by Atmospheric Mercury: Voluntary Subcategory 5m for States with Comprehensive Mercury Reduction Programs
The document presents information regarding a voluntary approach for listing waters impaired by mercury predominantly from atmospheric sources pursuant to Clean Water Act Section 303(d), also known as “subcategory 5m.”
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Options for Expressing Daily Loads in TMDLs
The draft document provides technical options for developing daily load expressions in TMDLs calculated using time frames greater than daily allocations.
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Third Party TMDL Development Toolkit
Water Environment Federation's toolkit provides basic steps in which an organization or group other than the lead water quality agency takes responsibility for developing the TMDL document and supporting analysis.
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EPA’s Additions to Indiana’s 2020 Impaired Waters List
Documents related to EPA’s Decision on Indiana’s 2020 Section 303(d) list of impaired waters
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Washington SIP: EPA Approved Regulations (Table 8 - Southwest Clean Air Agency)
EPA approved regulations for the Southwest Clean Air Agency in Washington's air quality State Implementation Plan (SIP).
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Materials for June 2024 Webinar on Final Regulation of Methylene Chloride under TSCA
Meeting materials from the June 4, 2024 webinar on the final risk management rule for methylene chloride.
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TSCA Work Plan Chemical Problem Formulation and Initial Assessment 1,4-Dioxane
1,4-Dioxane Problem Formulation and Initial Assessment
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Methylene Chloride Scope Document and Supplemental Files
scope document and supplemental files for methylene chloride
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Trichloroethylene (TCE) Scope Document and Supplemental Files
Scope document and supplemental files for Trichloroethylene (TCE)
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Asbestos Scope Document and Supplemental Files
Scope document and supplemental files for asbestos
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1-Bromopropane (1-BP) Scope Document and Supplemental Files
scope document and supplemental files for 1-BP
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Materials for June 2023 Webinar on Proposed Regulation of Methylene Chloride under TSCA
Materials page for webinar on risk management for methylene chloride
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N-Methylpyrrolidone (NMP) Scope Document and Supplemental Files
scope document and supplemental files for NMP
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1,4-Dioxane Scope Document and Supplemental Files
Scope Document and supplemental files for 1,4-dioxane
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TSCA Section 8(a)(1) Reporting and Recordkeeping Requirements for Asbestos
Description of proposed rule under TSCA section 8(a)(1) to require reporting on asbestos.
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Washington SIP: EPA Approved Regulations (Table 9 - Spokane Regional Clean Air Agency)
EPA approved regulations for the Spokane Regional Clean Air Agency in Washington's air quality State Implementation Plan (SIP).
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Final NPDES Permit for Consejo de Condominios Costeros, Inc. in Río Grande, Puerto Rico
EPA's NPDES wastewater permit for the El Yunque Treatment Plant Corporation in Puerto Rico.
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Final PSD Permit Extension Letter - Energy Answers Arecibo, LLC/Energy Answers Arecibo Puerto Rico Renewable Energy Project, PR
This page contains the Final PSD Permit Extension Letter for Energy Answers Arecibo Puerto Rico Renewable Energy Project, issued on April 10, 2017 and the EPA Public Announcement for Final PSD Permit Extension for Energy Answers Arecibo, PR.
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SDWA-UIC-AOC-09-2025-003: Dorothy K. Awai Revocable Living Trust, Haleiwa, HI; Proposed Settlement of Safe Drinking Water Act Administrative Penalty
Consent Agreement and Proposed Final Order between EPA Region 9 and the Dorothy K. Awai Revocable Living Trust, Haleiwa, HI, Docket No. SDWA-UIC-AOC-09-2025-003.