Pease Study

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CDC’s and ATSDR’s mission to protect public health requires that we pause the Pease Study to respond to the serious public health threat from the COVID-19 virus.

To protect the health of residents of Portsmouth, NH and surrounding communities and stop further spread of COVID-19, we are following CDC social distancing recommendations. Therefore, we will reschedule current appointments in the future and close the Pease Study office. We will continue to work on PFAS activities to address this important public health concern, including preparing for the time when we re-open the study.

We encourage everyone to do their part by limiting social gatherings and keeping a safe physical distance from others—staying at least six feet apart.

Please check our website periodically for PFAS updates.
If you would like to learn more about the virus, please click COVID-19.

Portsmouth, New Hampshire

The Pease Study is the first site of the national, Multi-site Study, which will look at the human health effects of PFAS exposure through drinking contaminated water. CDC and ATSDR will use the Pease Study to evaluate and improve procedures and methods for the Multi-site Study design.

The Pease Study is now enrolling participants who meet specific eligibility requirements. This study will expand our scientific understanding of PFAS by looking at the association between health outcomes and PFAS exposure from drinking water. 

If you would like to enroll in the study or if you are unsure about whether you qualify for the study, please call the Pease Study call center at 603-846-6192. The call center will screen you for eligibility and provide information on the next steps.

Contact Us

Phone the Pease Study call center at 603-846-6192 to be screened for eligibility.

For general information about PFAS or the Pease Study call, 800-CDC-INFO.

For general questions about the Pease Study, email

Recruitment progress for Pease Study: 21% of adult's goal of 1,100 and 10% of children's goal of 525.
FAQs about the Pease Study pause during CDC's and ATSDR's response to COVID-19

Q1: If I or my child have already scheduled an appointment for the Pease Study, what should I know?

We are contacting all participants who have appointments through June 2020 to inform them that they will be rescheduled after the COVID-19 virus outbreak is contained and the study can resume safely. If additional appointments need to be rescheduled  beyond June, we will be in touch.

Q2: Is the Pease Study call center or office in Portsmouth open?

For your safety, we are following agency guidelines on social distancing to slow the spread of the virus by temporarily closing the office. Since we do not have a date to resume the Study and cannot schedule future appointments at this time, we have closed the call center temporarily.

Q3: What do I do if I have questions about my or my child’s eligibility to participate in the study or have general questions about the study?

We invite you to read the eligibility section on our website to understand more about who can take part in the study. If you still have questions, please send us an email at and we will respond as quickly as possible.


Approximately 8,000 people work at or frequent the Pease International Tradeport. There are also two daycare centers located on the site. In May 2014, drinking water wells that supply the Pease International Tradeport were sampled. The Haven Well, one of three wells that serves the Pease International Tradeport and the New Hampshire Air National Guard base at Pease, showed elevated levels of the unregulated contaminant perfluorooctane sulfonic acid (PFOS). How long PFOS may have been present in this well is not clear. 

Because the level of PFOS exceeded the “provisional health advisory” set by the U.S. Environmental Protection Agency (EPA), the well was shut down by the City of Portsmouth on May 12, 2014, and since that time it has been physically disconnected from the system. The New Hampshire Department of Health and Human Services asked the Agency for Toxic Substances and Disease Registry (ATSDR) to help evaluate possible follow-up actions. 

Pease Feasibility Assessmentpdf icon [PDF -1MB]

Child Participation in the Pease Study: Question & Answer Sessions

On Tuesday, February 4, 2020 from 6:00 p.m. to 7:30 p.m., ATSDR held a community meeting at the New Hampshire Department of Environmental Services at the Pease Tradeport about child participation in the Pease Study. Child Life Specialist Jessica Laperle, CCLS, an expert in helping children with emotional needs in medical settings, gave a presentation and answered questions.

You can view the meeting, including the questions and answers segment, by following these links: 

On Wednesday, February 5, 2020 from 12:00 p.m. to 3:00 p.m., the Child Life Specialist was available for drop in discussions at the Pease Study Office.

See the Child Participation Questions & Answers Sessions Flyer

Get tips for preparing for your Pease Study Appointment, including the process for children and what to bring for each child.

For specific information on enrollment criteria, please view the Pease Study Community Fact Sheet, or phone the Pease Study call center at 603-846-6192

Pease Study Community Meeting

The Pease Study Community Meeting was held on October 24, 2019 in Portsmouth, NH. You can view the meeting, including the question and answer segment, by following the link provided here ( 

For specific information on enrollment criteria, please view the Pease Study Community Fact Sheet, or phone the Pease Study call center at 603-846-6192.

Additional Resources: 

Pease Community Assistance Panel (CAP) 

Interested in learning more about ATSDR activities at the Pease International Tradeport Site? Join us for the next CAP meeting.  Click here for more information about the Pease CAP 

Next CAP Meeting

The next CAP Meeting will be announced shortly.

Please check back periodically for more information.

March 2020 CAP transcript pdf icon[PDF – 206 KB]

ATSDR Information

Information from Other Agencies

Pease Study Process – Provide Information to Protect our Community 

Pease Study Process: Step 1 Community Engagement, Step 2 Recruitment, Step 3 Data Collection, Step 4 Analysis, Step 5 Individual Results, Set 6 Community Event, and Step 7 Study Results

Page last reviewed: June 25, 2020