Science & Technology

Nitrogen Dioxide (NO2) Air Quality Standards - Documents Prior to Review Completed in 1996

Nitrogen Dioxide (NO2 Primary) Air Quality Standards - Documents from Review Completed Prior to 1996

Outreach Materials from the National Aquatic Resource Surveys

Communication Materials associated with the National Aquatic Resource Surveys

Evaluating Analytical Method Improvements for Six-Year Review of Drinking Water Standards

Learn about how EPA considers analytical method improvements for evaluating contaminants in drinking water

Six-Year Review 1 Contaminant Occurrence Data (1993-1997)

EPA completed its first detailed contaminant occurrence analyses in 2003 for 69 regulated contaminants, using data provided by a national cross-section of 16 states.

Drinking Water Distribution Systems

Learn about an overview of drinking water distribution systems, the factors that degrade water quality in the distribution system, assessments of risk, future research about these risks, and how to reduce cross-connection control risk.

Small Nonroad Spark-Ignition Engines Interactive Data Report

This page provides more detailed data about certified locomotives Small Nonroad Spark-Ignition (NRSI) Engines.

Locomotive Engines Interactive Data Report

This page provides more detailed data about certified locomotives.

Large Nonroad Spark-Ignition Engines Interactive Data Report

This page provides more detailed data about certified locomotives Large Nonroad Spark-Ignition (NRSI) Engines.

Pollinator Projects at EPA Facilities

An image gallery showing pollinators and pollinator gardens at EPA facilities

Background Information on the South Platte Urban Waters Federal Partnership

Fact Sheet providing background information on the South Platte Urban Waters Location.

Sources of Greenhouse Gas Emissions

Sources of greenhouse gas emissions, inculding electricity production, tranportation, industry, agriculture, and forestry.

Project Profile: Ruckman Farm

This project profile for Ruckman Farm, located in Albany, Missouri, includes information about the farm's anaerobic digestion system, benefits, and recognition.

Project Planning and Financing

Designed to help evaluate if your technically feasible anaerobic digester system will work financially.

Report: OIG Report to the Office of Management and Budget on the EPA’s Semi-Annual Report on Purchase Card Violations

Children's Health Research regarding Prenatal and Early Life Exposure and Long-term Health Consequences

EPA is studying possible epigenetic modification resulting from exposures during critical windows of development.

Children's Health Research regarding Asthma

EPA is conducting research to investigate the causes of childhood asthma. Recent evidence implicates air pollution as a factor.

Beta SDAMs

Data-driven regionally specific beta methods were developed using the first year of field sampling data from each region. After additional data collection and analysis, agency and user feedback, the beta methods were replaced with final Regional SDAMs