Skip to Main Navigation
Skip to Page Content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it's official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Share This:
Two part image of water pouring from a faucet and an unlabeled plastic bottle in the sand

Peer Review

Draft Reports from the 2-Year Toxicity and Carcinogenicity Studies of HMB and PFOA
December 12, 2019

Meeting details

Person filling glass with water from a faucet


Final reports from the Per- and Polyfluoroalkyl Substances (PFAS) 28-Day toxicity studies are now available.

Read the Reports

Football player running on synthetic turf field

Crumb Rubber

Final reports from the Synthetic Turf/Recycled Tire Crumb Rubber studies are now available

Read the Reports

The text "Update Newsletter" on top of the NTP Logo

October NTP Update

Information about recent NTP activities and events.

Read Newsletter

Image of Mountain Tops with message Evaluating agents of public health concern through toxicology testing, research, and analysis

NTP Annual Report

NTP Annual Report for Fiscal Year 2018 now available.

Read the Report

Toxicology in the twenty first century


The Tox21 Program characterizes potential toxicity of chemicals using cells and isolated molecular targets instead of laboratory animals.

Learn About Tox21

person's hand on the grass holding a plant

About NTP

Science you can depend on for decisions that matter.

The National Toxicology Program provides the scientific basis for programs, activities, and policies that promote health or lead to the prevention of disease. Founded in 1978, NTP plays a critical role in generating, interpreting, and sharing toxicological information about potentially hazardous substances in our environment. NTP strives to remain at the cutting edge of scientific research and the development and application of new technologies for modern toxicology and molecular biology.

A world leader in toxicology research, NTP has evaluated more than 2800 environmental substances for potential human health effects.

Learn More About NTP