Science & Technology

This page shows all of the pages at www.epa.gov that are tagged with Science & Technology.

  • TSCA Environmental Release Application (TERA) for Pseudomonas fluorescens strains HK44 and 5RL

    TERAs submitted by the University of Tennessee and Micro Systems Technologies, LLC and given the tracking designation of R-04-01 and R-04-02. The strain will be tested to examine its ability to detect and monitor naphthalene and methyl salicylate.

  • Two TSCA Environmental Release Applications (TERAs) for Bradyrhizobium japonicum (B. japonicum)

    TERAs pertaining to field trials of two mutant strains (Bj 5019 and TN 119(12)) of Bradyrhizobium japonicum (B. japonicum), a common soil bacterium which is used as a commercial seed inoculant.

  • Reduced Residue Chemistry Data Requirements for Seed-Treatment Uses

    EPA is publishing new guidance, including a tiered approach to help manufacturers and EPA determine when the number of field trials can be reduced to register seed treatment uses.

  • Learn About Data Standards

    This page contains basic information on data standards.

  • AQS Memos - Questions and Answers Related to the AMP-255 Report

    AQS Memos - Questions and Answers Related to the AMP-255 Report

  • EPA Metadata Style Guide Keywords and EPA Organization Names

    The following keywords and EPA organization names listed below, along with EPA’s Metadata Style Guide, are intended to provide suggestions and guidance to assist with the standardization of metadata records.

  • Obtaining AQS Data

    AQS Obtaining AQS Data

  • AQS NO2 and SO2 NAAQS Revisions

    AQS NO2 and SO2 NAAQS Revisions

  • AQS Memos - Lead monitors and the analyzing agency

    AQS Memos - Lead monitors and the analyzing agency

  • Indicators: Human Disturbance

    Human disturbance is a measure of the vulnerability of aquatic resources to a variety of harmful human activities such as tree removal, road building, construction near shorelines/streambanks, and artificial hardening of lakeshores with retaining walls.

  • Indicators: Lakeshore Habitat/Riparian Vegetative Cover

    Riparian and lakeshore vegetative cover consist of the vegetation corridor alongside streams, rivers, and lakes. Vegetative cover refers to overhanging or submerged tree limbs, shrubs, and other plants growing along the shore of the waterbody.

  • Indicators: Sediment Toxicity

    Phosphorus, like nitrogen, is a critical nutrient required for all life. Phosphate (PO4), which plays major roles in the formation of DNA, cellular energy, and cell membranes (and plant cell walls). Too much phosphorus can create water quality problems.

  • Indicators: Sediment Mercury

    Sediment mercury is mercury that has become embedded into the bottom substrates of aquatic ecosystems. Mercury is a common pollutant of aquatic ecosystems and it can have a substantial impact on both human and wildlife health.

  • Indicators: Phosphorus

    Phosphorus, like nitrogen, is a critical nutrient required for all life. Phosphate (PO4), which plays major roles in the formation of DNA, cellular energy, and cell membranes (and plant cell walls). Too much phosphorus can create water quality problems.

  • Indicators: Nitrogen

    Nitrogen, like phosphorus, is a critical nutrient required for all life. Nitrogen can occur in rivers and streams, lakes, and coastal waters in several forms including ammonia (NH3), nitrates (NO3), and nitrites (NO2).

  • Indicators: Conductivity

    Conductivity is a measure of the ability of water to pass an electrical current. Because dissolved salts and other inorganic chemicals conduct electrical current, conductivity increases as salinity increases.

  • Indicators: Atrazine

    Atrazine is an herbicide widely used for control of broadleaf and grassy weeds. It is sprayed on row crops such as corn, sorghum and sugarcane, and in some areas is used on residential lawns. It also been used on highway and railroad rights-of-way.

  • Indicators: Zooplankton

    Zooplankton are small, free-floating aquatic microorganisms including crustaceans, rotifers, open water insect larvae, and aquatic mites. The zooplankton community is composed of both primary consumers and secondary consumers.

  • Indicators: Sediment Diatoms

    Diatoms are a type of algae that are typically abundant in marine and freshwater ecosystems. They have inorganic cell walls made up of silica (glass). Diatoms most commonly grow suspended in water, although they can also attach to substrates.

  • Indicators: Phytoplankton

    Phytoplankton are free-floating, microscopic algae that inhabit the sunlit, upper layer of most freshwater and marine environments. They are usually responsible for the color and clarity of lakes, wetlands, rivers, streams and estuaries.

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