Laws & Regulations

Envirofacts Data Service API (V1)

Envirofacts is developing web services to facilitate the sharing of its functionality and information. Version 1 of the Envirofacts REST Service is detailed on this page.

State CO2 Emissions from Fossil Fuel Combustion

Find and download state carbon dioxide emission inventories by end-use sector from 1990 through 2015.

EPA Facility Stormwater Management

Stormwater is rainwater or melted snow that runs off streets, lawns, and other sites.

Supporting Documents for the Final Rule for UIC Class VI Wells

This webpage provides links to supporting documents for the UIC Class VI Final Rule

Supporting Documents for the UIC Class VI Proposed Rule

This webpage provide links to supporting documents for the UIC Class VI proposed rule for geologic sequestration.

Chronic Toxicity - Freshwater WET Methods

Whole effluent toxicity (WET) methods for testing chronic toxicity in freshwater organisms after exposure to wastewater.

Procedures for Detection and Quantitation - Documents

Documents pertaining to method detection limit (MDL) and quantitation procedures for CWA Analytical Methods

Procedures for Detection and Quantitation

Documents produced by a Federal Advistory Committee on detection and quantitation procedures, that operated during 2005 to 2007.

Alternate Test Procedures: Questions and Answers

Frequent questions about alternate test procedures for Clean Water Act analytical methods and the approval process

Approved CWA Test Methods for Pesticide Active Ingredients

Chemical test methods for pesticide pollutants in water. Approved for use with effluent guidelines regulations for the Pesticide Chemicals category (40 CFR Part 455).

Methods Update Rule - 2017

Description and documents for the 2017 Methods Update Rule, published 8/28/2017. Amends 40 CFR Part 136.

Guidance for Halon Emissions Reduction Rule (40 CFR Part 82, Subpart H)

Document provides guidance for technicians on compliance with EPA's halon emission reduction rule (40 CFR 82, Subpart H). Guidance covers technician training requirements and proper halon disposal and recycling.

Support Documents for the Phase III Cooling Water Intake Rule (2006)

Documents supporting the final Phase III rule for cooling water intakes (2006).

Support Documents for the Phase II Cooling Water Intake Rule (2004; withdrawn)

Documents supporting the Phase II cooling water intake rule (subsequently withdrawn)

Final Extension of Start Date for Revised Photochemical Assessment Monitoring Stations

Extension of Start Date for Revised Photochemical Assessment Monitoring Stations

Procedures for Processing Requests to Redesignate Areas to Attainment

Guidance for processing requests for redesignation of nonattainment areas to attainment for ozone (O3), carbon monoxide (CO), particulate matter (PM-10), sulfur dioxide (SO2), nitrogen dioxide (NO2), and lead (Pb).

Reasonable Further Progress, Attainment Demonstration, and Related Requirements for Ozone Nonattainment Areas Meeting the Ozone National Ambient Air Quality Standard

EPA interprets certain CAA provisions so as not to require areas meeting the ozone standard to make the SIP submissions to EPA described in the provisions as long as the areas continue to meet the standard, and has a process for determining that attainment