Science & Technology
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WQX Detection Limits Best Practices Guide
The Water Quality eXchange (WQX) Detection Limits Best Practices Guide provides guidance for organizations to document censored data when submitting physical chemical and/or biological data to WQX.
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FIFRA Scientific Advisory Panel Formation Process
This document provides detailed information on how EPA selects members of the Scientific Review Board to assist permanent members of the FIFRA Scientific Advisory Panel.
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EPA Begins Hazardous Substances Removal from Former Omni Polymers Facility in Toledo, Ohio
The U.S. Environmental Protection Agency (EPA) has begun the cleanup of hazardous substances at the former Omni Polymers facility located at 1925 Nebraska Ave. in Toledo, Ohio. The cleanup is expected to be completed by spring 2026.
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Ambient Air Monitoring Quality Assurance
Ambient Monitoring Quality Assurance
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Model Clearinghouse - Documents
Model Clearinghouse Documents
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Air Quality Models - Clarification Memos for Dispersion Models
Memoranda issued by EPA as general clarifications for issues related to Appendix W and technical aspects of dispersion models, when necessary.
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Air Modeling - Meteorological Guidance
Meteorological guidance for the use of observational data in permit modeling, monitoring for modeling applications, and other related data procedures and quality assurance
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Summary of Oklahoma's Water Reuse Guideline or Regulation for Landscaping
Oklahoma (State Regulation) | Source water: Treated municipal wastewater | End use: Landscaping
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Summary of Nevada's Water Reuse Guideline or Regulation for Landscaping
Nevada (State Regulation) | Source water: Treated municipal wastewater | End use: Landscaping
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Summary of Utah's Water Reuse Guideline or Regulation for Landscaping
Utah (State Regulation) | Source water: Treated municipal wastewater | End use: Landscaping
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Summary of Arizona's Water Reuse Guideline or Regulation for Centralized Non-potable Reuse
Arizona (State Regulation) | Source water: Treated municipal wastewater | End use: Centralized non-potable water reuse
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Summary of Arizona's Water Reuse Guideline or Regulation for Consumption by Livestock
Arizona (State Regulation) | Source water: Treated municipal wastewater | End use: Consumption by livestock
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Summary of Arizona's Water Reuse Guideline or Regulation for Impoundments
Arizona (State Regulation) | Source water: Treated municipal wastewater | End use: Impoundments
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Summary of Arizona's Water Reuse Guideline or Regulation for Agriculture
Arizona (State Regulation) | Source water: Treated municipal wastewater | End use: Agriculture
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Summary of Arizona's Water Reuse Guideline or Regulation for Landscaping
Arizona (State Regulation) | Source water: Treated municipal wastewater | End use: Landscaping
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Summary of California's Water Reuse Guideline or Regulation for Centralized Non-potable Reuse
California (State Regulation) | Source water: Treated municipal wastewater | End use: Centralized non-potable water reuse
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Summary of California's Water Reuse Guideline or Regulation for Agriculture
California (State Regulation) | Source water: Treated municipal wastewater | End use: Agriculture
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Summary of California's Water Reuse Guideline or Regulation for Impoundments
California (State Regulation) | Source water: Treated municipal wastewater | End use: Impoundments
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Summary of California’s Water Reuse Guideline or Regulation for Rainwater Collected Onsite for Potable Water Reuse
California (State Regulation) | Source water: Onsite collected waters | End use: Potable water reuse
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Summary of California's Water Reuse Guideline or Regulation for Industry
California (State Regulation) | Source water: Treated municipal wastewater | End use: Water reuse for industry