Laws & Regulations
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Method 313B - Residual Hydrocarbon in Solution Polymers by Capillary Gas Chromatography
Promulgated CFR Test Method 313B Determination of Residual Hydrocarbon in Solution Polymers by Capillary Gas Chromatography
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Perchlorate in Drinking Water
Perchlorate is a naturally occurring and manufactured chemical anion. On February 11, 2011, EPA determined that perchlorate meets the Safe Drinking Water Act criteria for regulation as a contaminant.
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Enforcement Policy, Guidance & Publications
EPA air, water, waste, chemical, cleanup and criminal policy, guidance and publications on environmental laws and regulations.
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Six-Year Review 2 of Drinking Water Standards
Read the summary of EPA's Six-Year Review 2 of existing drinking water standards and learn about the four regulatory revision candidates
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Underground Injection Control in Region 10 (AK, ID, OR, and WA)
Region specific UIC contact information is provided.
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Notices of Intent Archive: Publicly Owned Treatment Works General Permit (POTW GP) for Massachusetts & New Hampshire
Notices of Intent Archive for the Publicly Owned Treatment Works General Permit (POTW GP) in Massachusetts and New Hampshire
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Merrimack Station Administrative Record
Administrative Record documents for Merrimack Station, New Hampshire
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Where do I find information about aquaculture operations?
The Agency's NPDES Web site contains information on aquaculture operations.
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Operating Permit Timeline for New Mexico or Albuquerque
Part 70 Title V Operating Permit Timeline for New Mexico
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Approval of Request for Coverage under General Air Quality Permit; Costco Fuel Facility, Location No. 1834, Scottsdale, AZ
Notification of Coverage under the Air Quality Permit by Rule for New or Modified True Minor Source Gasoline Dispensing Facilities in Indian Country: Costco Fuel Facility, Location No. 1834. Source ID # 134; Application # 2026-007-PBR. EPA-R09-OAR-2026-637
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Drinking Water Requirements for States and Public Water Systems
Access information on implementing drinking water rules; as well as training materials and resources for small public water systems.
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Closure Letter for Administrative Complaint Nos. 03R-07-R9 and 11R-98-R9
On July 7, 2017, ECRCO issued a Closure Letter for Administrative Complaint Nos. 03R-07-R9 and 11R-98-R9, involving the Arizona Department of Environmental Quality (ADEQ).
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Complaints Filed with EPA under Title VI of the Civil Rights Act of 1964: Case #01R-11-R6
These documents are related to case #01r-11-r6
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Final Closure Letter for Administrative Complaint Numbers 03R-07-R9, 10R-07-R9 and 01R-11R9
On 6-7-2017, ECRCO issued a closure letter for Admin Complaint Numbers 03r-07-r9, 10r-07-r9 and 01r-11-r9 involving the Maricopa County Air Quality Department regarding alleged complaints that MCAQD violated Title 6 of the Civil Rights Act of 1964.
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Performance Specification 4 for Carbon Monoxide
Performance Specification 4 - Specifications and Test Procedures For Carbon Monoxide Continuous Emission Monitoring Systems In Stationary Sources
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Performance Specification 4A for Carbon Monoxide
Performance Specification 4A - Specifications and Test Procedures For Carbon Monoxide Continuous Emission Monitoring Systems In Stationary Sources
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Method 204 - Permanent (PTE) or Temporary Total Enclosure (TTE) for Determining Capture Efficiency
Promulgated CFR Test Method 204 Criteria for and Verification of a Permanent or Temporary Total Enclosure.
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Performance Specification 9 for Gas Chromatographic Continuous Emission Monitoring System
Performance Specification 9 - Specifications and Test Procedures for Gas Chromatographic Continuous Emission Monitoring System in Stationary Sources
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Method 326 Determination of Isocyanates in Stationary Source Emissions
Determination of Isocyanates in Stationary Source Emissions