Several highly publicized campaigns are taking place to save the data maintained by the US Environmental Protection Agency (EPA) from becoming inaccessible to the public under the Trump administration.

“There is no reason to think the data is safe,” says Gretchen Goldman, research director at the Center for Science and Democracy, a program at the Union of Concerned Scientists. “The administration, so far, hasn’t given any indication it will respect science and scientific data, especially when it’s inconvenient to its policy agendas.”

That data, kept in dozens of databases, represents decades of monitoring the American environment in fine detail. For example: the EPA collects data on the chemical composition of pollutants and their geographic distribution. Here is a list of data sets that gives an idea of the breadth of scientific knowledge that resides with the agency.

Emissions modeling

The database and web tool, designed for states and local agencies, calculate the emission-saving benefits of implementing policies and energy efficiency or renewable energy policies and programs.

https://www.epa.gov/statelocalclimate/avoided-emissions-and-generation-tool-avert

Air Markets Program

Incorporating interactive maps, this database allows you to gather information about specific air pollutants by industry.

https://ampd.epa.gov/ampd/

Clean Air Status and Trends Network

This site provides data from 95 air pollution sensors across the US as part of the effort to audit pollution reduction. It includes measurements on ozone, sulfur dioxide, nitrogen oxide, ammonium and other pollutants, along with a variety of meteorological data.

https://www.epa.gov/castnet

Emissions and Generation Resource Database

Electricity generation is one of the key industries that the EPA oversees. This database collects a variety of information about the industry, including emission rates of pollutants, the amount of electricity production and the types of fuels used to generate power.

https://www.epa.gov/energy/emissions-generation-resource-integrated-database-egrid

Clean air market modeling

This site contains data and analytics tools that allow state and local agencies to analyze the impact of policies designed to limit emissions from power plants.

https://www.epa.gov/airmarkets/clean-air-markets-power-sector-modeling

Enforcement status

This database keeps tabs on the inspection and enforcement work by federal and state agencies, including major civil or criminal cases and settlements on the violations of clean air, clean water and hazardous waste laws.

https://www.epa.gov/enforcement/data-and-results

Tracking acid rain

This portal gives access to the long term monitoring of pollution in streams and lakes caused by acid rain from industrial emissions.

https://www.epa.gov/airmarkets/clean-air-markets-monitoring-surface-water-chemistry

Greenhouse gas reporting

These depository and mapping tools let you search data on greenhouse gas emissions by facility, industry and location. Collected since 1990, the database collects information reported by more than 8000 facilities in oil and gas, mining, power generation, chemical production, pulp and paper and more.

https://www.epa.gov/ghgreporting

Greenhouse Gas Data Explorer

This site houses the annual inventory of greenhouse gas emissions and sinks and comes with interactive tools that enable you to create graphs and study trends over time.

https://www3.epa.gov/climatechange/ghgemissions/inventoryexplorer/

Beach health

The EPA collects data on pollutants that affect coastal water quality. This allows state and local officials to monitor water quality and decide whether to restrict swimming or close access to public beaches altogether.

https://www.epa.gov/beach-tech

National Aquatic Resource Surveys

This site gives access to many sets of data on water chemistry, habitat, land use, insects and fish species in and around streams, lakes and wetlands.

https://www.epa.gov/national-aquatic-resource-surveys/data-national-aquatic-resource-surveys

Watershed Index

The library of data focuses on various aspects of watersheds, including environmental traits, such as the types of trees and wildlife, and sources of stress that cause environmental damage. It comes with a tool to analyze and compare watersheds.

https://www.epa.gov/waterdata/watershed-index-online

Ambient Water Quality Tools

By pulling pollution data from states, reports on stormwater runoffs and public notice about health impact of eating certain types of fish, the EPA created a site for tracking water quality and its impact on the environment and public health.

https://www.epa.gov/waterdata/ambient-water-quality-tools

National hydrography data

This dataset and accompanying analytics tool allow you to estimate the volumes and velocity of streamflow, information that’s critical for researchers to understand issues such as erosion and the concentration and movement of pollutants.

https://www.epa.gov/waterdata/nhdplus-national-hydrography-dataset-plus

Hazardous waste facility monitoring

This portal has data on thousands of toxic sites – factories, mines, power plants, landfills. It includes the history and location of a facility, information on how pollution is monitored and the enforcement actions at each location.

https://www3.epa.gov/enviro/facts/rcrainfo/search.html

Envirofacts

This site is all about how to search for and download data. It’s a valuable tool for those looking guidance on where to find information in EPA’s vast archive.

https://www.epa.gov/enviro/data-downloads