Science & Technology

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.

About EPA Digitization Centers

Purpose of the EPA Digitization Centers

Cutting-Edge Contracting Innovation Lab (CECIL)

EPA's Cutting-Edge Contracting Innovation Lab (CECIL) offers EPA's contracting professionals access to innovative acquisition concepts, techniques, and strategies with support. Inspired by the DHS PIL, this is the hub of EPA's innovation in acquisition.

Learn About Data Standards

This page contains basic information on data standards.

Coral Reefs

Coral reefs are among the most biologically diverse and valuable ecosystems on Earth. This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them.

Best Practices for Siting Solar Photovoltaics on Municipal Solid Waste Landfills

Information concerning reusing former landfills as large solar projects

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

Biological Agents

These chemicals or organisms increase the rate at which microorganisms break down complex compounds into simpler products (biodegredation). Two bioremediation technologies currently being used for oil spill cleanups are fertilization and seeding.

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 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: Dissolved Oxygen

Dissolved oxygen (DO) is the amount of oxygen that is present in water. It is an important measure of water quality as it indicates a water body's ability to support aquatic life. Water bodies receive oxygen from the atmosphere and from aquatic plants.

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.