Science & Technology

Alternative Wastewater Disinfectant Research

EPA's research on alternative wastewater disinfection and treatment including peracetic acid

Wastewater Contaminants Research

EPA's research on biological, chemical, and other contaminants in wastewater systems and biosolids

Managing the Quality of Environmental Data at EPA Region 10

Information from Region 10 about managing the quality of environmental information

Water Quality Standards Regulations: Tennessee

Information related to Water Quality Standards for Tennessee.

Regional Monitoring Networks Tools

The purpose of the site is to provide the regional, state, and tribal partners with the technical information that we've developed in order to participate in the regional monitoring networks (RMNs).

Safer Choice Guidance for Ingredient Disclosure Requirements

Guidance on how to meet the ingredient disclosure requirements for the Safer Choice Program

EPA Marks Major Milestone with Partial Deletion of NASA Marshall Space Flight Center from Superfund National Priorities List

EPA News Release: EPA Marks Major Milestone with Partial Deletion of NASA Marshall Space Flight Center from Superfund National Priorities List

• Release Date: March 6, 2025

What emissions data are available for 2018 and 2019?

EPA has NEI point source data for 2018 and 2019, available upon request by using the Contact Us form , and selecting "Point Sources." Note that some of these sources reuse 2017 data by carrying it forward, but many sources have updated values in these interim year datasets. Emissions inventories…

• Last published: March 6, 2025

Validated Test Method 3570: Microscale Solvent Extraction (MSE)

describes the procedure for extracting volatile, semivolatile, and nonvolatile organic compounds from solids such as soils, sludges, and wastes

Volume-to-Weight Conversion Factors for Solid Waste

EPA’s 1997 report, “Measuring Recycling: A Guide for State and Local Governments”, was a guide to facilitate standardization of MSW data collection at the local level. This document provides updates to the factors found in the report.

Validated Test Method 3571: Extraction of Solid and Aqueous Samples for Chemical Agents

describes the extraction of chemical agents from aqueous and solid samples using a microextraction technique applicable to concrete, charcoal, wood, water, brine, ash, coral, sand and soil

Validated Test Method 5030C: Purge-and-Trap for Aqueous Samples

This method describes a purge-and-trap procedure for the analysis of volatile organic compoundsin aqueous samples & water miscible liquid samples. It also describes the analysis of high concentration soil and waste sample extracts prepared in Method 5035.

Validated Test Method 5035A: Closed-System Purge-and-Trap And Extraction For Volatile Organics In Soil And Waste Samples

This method describes a closed-system purge-and-trap process for the analysis of volatile organic compounds (VOCs) in solid materials (e.g., soils, sediments, and solid waste).

Validated Test Method 6850: Perchlorate in Water, Soils and Solid Wastes Using High Performance Liquid Chromatography/Electrospray Ionization/Mass Spectrometry (HPLC/ESI/MS or HPLC/ESI/MS/MS)

method that uses HPLC coupled with ESI MS or MS/MS to determine perchlorate levels in surface water, groundwater, wastewater, salt water and soil

Validated Test Method 6860: Perchlorate in Water, Soils and Solid Wastes Using Ion Chromatography/Electrospray Ionization/Mass Spectrometry (IC/ESI/MS or IC/ESI/MS/MS)

method that uses IC coupled with ESI MS or MS/MS to determine the level of perchlorate in surface water, groundwater, salt water and soil

Validated Test Method 8015D: Nonhalogenated Organics Using Gas Chromatography/Flame Ionization Detection (GC/FID)

method that may be used to determine the concentrations of various nonhalogenated volatile organic compounds and semivolatile organic compounds by gas chromatography

Validated Test Method 8170: Assay of Chemical Agents in Solid and Aqueous Samples by Gas Chromatography/Flame Photometric Detection (GC/FPD)

this describes the analysis of chemical agents in aqueous and solid samples by GC/FPD and has been applied to concrete, charcoal, wood, water, brine, ash, coral, sand, and soil

Validated Test Method 3542A: Extraction of Semivolatile Analytes Collected Using Method 0010 (Modified Method 5 Sampling Train)

method that describes the extraction of semivolatile organic compounds from samples collected by Method 0010, replacing Sample Preparation section of Method 0010 (SemiVOST)

Validated Test Method 8265: Volatile Organic Compounds (VOCs) in Water, Soil, Soil Gas, and Air by Direct Sampling Ion Trap Mass Spectrometry (DSITMS)

method that uses DSITMS for the rapid measurement, continuous monitoring, and preliminary screening of VOCs in water, soil, soil gas, and air

Validated Test Method 8271: Assay of Chemical Agents in Solid and Aqueous Samples by Gas Chromatograph/Mass Spectrometry, Electron Impact (GC/MS/EI)

method for analysis of chemical agents in aqueous and solid samples by gas GC/MS and has been applied to concrete, charcoal, wood, water, brine, ash, coral, sand, and soil