Data and Tools
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Bioaccumulation and Aquatic System Simulator (BASS)
On Bioaccumulation and Aquatic System Simulator (BASS), a model that simulates the population and bioaccumulation dynamics of age-structured fish communities.
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DOE RESL Method P-2: 32P Fish, Vegetation, Dry Ash, Ion Exchange
This method uses Cerenkov counting and liquid to determine scintillation phosphorus in soil, sediment, wipes, air filters and vegetation.
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EPA Method 524.2: Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry
SAM lists this method for preparation and analysis of water samples to address carbon disulfide, 1,2-dichloroethane, acrylonitrile and methyl acrylonitrile, using GC-MS.
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Additional Areas Subject to Mitigation Plan Requirements Under the Exceptional Events Rule
This page contains letters and documents associated with mitigation plans under the Exceptional Events Rule.
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EPA Method 350.1: Determination of Ammonia Nitrogen by Semi-Automated Colorimetry
SAM lists this method for preparation and analysis of drinking water samples for ammonia, using visible spectrophotometry.
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EPA Method 335.4: Determination of Total Cyanide by Semi-Automated Colorimetry
SAM lists this method for preparation and analysis of drinking water samples to determine total cyanide, using semi-automated colorimetry.
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Method 200.7: Determination of Metals and Trace Elements in Water and Wastes by Inductively Coupled Plasma-Atomic Emission Spectrometry
SAM lists this method for preparation and analysis of drinking water samples for total arsenic, thallium and vanadium, using inductively coupled plasma-atomic emission spectrometry.
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NIOSH Method 3510: Monomethylhydrazine
Method 3510 describes procedures for analysis of monomethylhydrazine in air samples using visible spectrophotometry.
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Sensor Loan Application Form
form for receiving Air Sensor
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Visualizing Ecosystem Land Management Assets (VELMA) Training Webinar Archive
This training webinar provides an overview of Visualizing Ecosystem Land Management Assets (VELMA), a spatially explicit ecohydrological watershed model planners use to visualize the effects of different scenarios.
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Proctor Creek Watershed Story Map Webinar Archive
This EPA Tools & Resources webinar provides an overview of Story Maps and how they can be used to, featuring the Proctor Creek Watershed Story Map as an example.
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PFAS Disposal and Destruction Research
The presentation provides an update on disposal and destruction research for PFAS, which have many and varied pathways into waste streams.
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Overview of EPA PFAS R&D: Recent Accomplishments and Near-term Objectives
This presentation provides an overview of the different lines of R&D that EPA is conducting to address gaps and generate scientific information to enable decision makers to take action on PFAS.
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Preparing for Wildland Fire Smoke Webinar Archive
This EPA Tools & Resources webinar covers preparing for wildland fire smoke that can infiltrate indoors, highlighting the ASHRAE Planning Framework for Protecting Commercial Building Occupants from Smoke During Wildfires.
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Analytical Methods for PFAS in Environmental Media
his presentation provides a summary and update on EPA analytical methods for PFAS in drinking, ground, surface and wastewaters in addition to solid samples such as soils, sediments, biosolids and tissues.
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Contact HMS Helpdesk
Hydrologic Micro Services (HMS) request form. HMS Helpdesk
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Greenhouse Gas Subpart AA Model
Search the GHG data for individual facilities by name, or location or filter the data set by state or county, industrial sectors, annual facility emissions thresholds and greenhouse gases.
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Greenhouse Gas Subpart D Model
Search the GHG data for individual facilities by name, or location or filter the data set by state or county, industrial sectors, annual facility emissions thresholds and greenhouse gases.
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Greenhouse Gas Subpart DD Model
Search the GHG data for individual facilities by name, or location or filter the data set by state or county, industrial sectors, annual facility emissions thresholds and greenhouse gases.
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Risk-Screening Environmental Indicators (RSEI) Methodology
Document for Risk-Screening Environmental Indicators (RSEI) Methodology Version 2.3.12, March 2024.