United States
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AERSCREEN Released as the EPA Recommended Screening Model
This document is part of the NSR Policy & Guidance Database.
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Guidance for 1-Hour SO2 Nonattainment Area SIP Submissions
This document is part of the NSR Policy & Guidance Database.
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Interim VOC Measurement Protocol for the Wood Products Industry – July 2007
This document is part of the NSR Policy & Guidance Database.
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Effective Permitting Tools for Fine Particulate Matter under the Prevention of Significant Deterioration Permitting Program
This document is part of the NSR Policy & Guidance Database.
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Petition Requesting the Administrator to Object to Title V Operating Permit Issued to Noranda Alumina
This document may be of assistance in applying the Title V air operating permit regulations. This document is part of the Title V Petition Database available at www2.epa.gov/title-v-operating-permits/title-v-petition-database. Some documents in the databa
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Studies Related to the National Aquatic Resource Surveys
Access to information on tools and data that are related to the National Aquatic Resource Surveys (NARS).
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Proposed Redesignation of Unclassifiable Areas in Missouri, Nebraska, Ohio, and Texas
EPA is proposing to redesignate as “attainment/unclassifiable” certain “unclassifiable” areas in Missouri, Ohio, Nebraska, and Texas. When these areas were initially designated,
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Final Report: Oil and Gas Extraction Wastewater Management
EPA is conducting a study of the management of produced water from oil and gas extraction wells.
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Method 1694 - Frequent Questions
Questions and answers about EPA Method 1694, which covers 73 pharmaceuticals and personal care products (PPCPs)
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Industrial Wastewater Studies - Miscellaneous
Studies of industrial wastewater discharges from various industrial categories. The studies are used in the planning process for Effluent Guidelines regulations.
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Best Conventional Pollutant Control Technology Effluent Guidelines
Rules promulgating effluent limitations for industrial wastewater, based on Best Conventional Pollutant Control Technology (BCT), as defined at Clean Water Act section 304(b)(4). Covers multiple industrial categories.
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PCB Congeners by Low-Resolution GC-MS - Method 1628 (Not yet approved)
Clean Water Act Method 1628 measures polychlorinated biphenyls (PCBs) in wastewater (draft, July 2021)
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Approved CWA Test Methods: Organic Compounds
Analytical methods for organic compounds in water; promulgated under Clean Water Act section 304(h), published at 40 CFR Part 136
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CWA Analytical Methods: Contaminants of Emerging Concern
Test methods for pharmaceuticals and personal care products in wastewater and other contaminants of emerging concern
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Legal Authority for CWA Analytical Methods
Summary of legal authority for EPA issuance of Clean Water Act analytical methods (40 CFR Part 136)
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Approved CWA Test Methods for Pharmaceutical Pollutants
Chemical test methods for pharmaecutical pollutants in water. Approved for use with effluent guidelines regulations for the Pharmaceutical Manufacturing Category (40 CFR Part 439).
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Approved Industry-Specific CWA Test Methods
Approved analytical methods for wastewater from specific industries: Pharmceutical Manufacturing (40 CFR Part 439); Pesticide Chemicals Manufacturing (40 CFR Part 455)
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Alternate Test Procedure Documents
Documents supporting the Clean Water Act ATP program, described at 40 CFR 136.4 and 136.5.
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Other Clean Water Act Test Methods: Microbiological
Microbiological test methods for ambient water, wastewater and groundwater; and related publications. These methods are not approved under 40 CFR Part 136.
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EPA Publication Numbering System
Explanation of the EPA Publication Numbering System.