PFAS at Waste Sites

Statewide sampling, tracking and monitoring of releases into the environment.

Waste sites that have found PFAS in the environment are located throughout the state of New Hampshire. Sources of PFAS at those sites have been analyzed by NHDES, with the findings communicated via public presentations to various audiences. Waste sites are identified at NHDES based on a Site Number (such as “199712055”); these site numbers can be identified using the Occurrence Report, the PFAS Sampling Map and/or NHDES OneStop, as described below. For information on the requirements for waste site investigations, management and remediation of PFAS contamination, see our Waste Site Remediation page.

Pursuant to the laws of the State of New Hampshire, January Session of 2018 Chapter 306:2 (HB 1766), NHDES prepares reports to satisfy the twice yearly reporting to the Legislature on the occurrence of PFAS in New Hampshire.

The waste sites where PFAS have been detected in groundwater are summarized in tables attached to the semi-annual Occurrence Report. These waste sites, along with their site numbers (such as “199712055”) and the maximum concentration in groundwater for those PFAS with AGQS are listed on Table 2 (Solid Waste Facilities [e.g., landfills and lined wastewater lagoons]), Table 3 (Hazardous Waste Remediation Sites), and Table 4 (Oil Remediation Sites). Site numbers for Groundwater Discharge Permit sites are shown on Table 5.

Waste sites where groundwater has been sampled for PFAS are visible on the PFAS Sampling Dashboard. The map uses different color symbols to indicate whether a site has sampled groundwater for PFAS and: 

  • (i) PFAS were not detected at levels greater than laboratory reporting limits; 
  • (ii) PFAS were detected, but at levels less than the applicable Ambient Groundwater Quality Standards (AGQS)(link); or 
  • (iii) PFAS were detected at levels greater than the applicable AGQS.   

This interactive map also allows the user to access PFAS water quality data that exist in the NHDES Environmental Monitoring Database (EMD). By zooming in and clicking on a point of interest, the user may observe the concentrations of PFOA, PFOS, PFHXS, PFNA and Total PFAS that were detected in a sample. Only a portion of New Hampshire waste sites have uploaded data to EMD – to view groundwater analytical data for a site that has not uploaded data to EMD, the user must use OneStop as described below to access a PDF of the site data. 

Please note that the sites and data presented are under constant revision as new sites and sampling data are added. The data may not contain all the potential or existing sites or facilities.

New Hampshire’s waste sites have primarily assessed for the presence of PFAS in groundwater; however, as part of site investigations, certain sites have also assessed other matrices, such as surface water, foam, sediment, soil, leachate, fish, wildlife, stormwater, rainwater and air emissions. Testing results for these other matrices can be accessed in the project files from NHDES OneStop.  

onestop database logoInvestigation and other related documents for a site are available in PDF format from the NHDES OneStop Data and Information webpage. To access site information: 

  • In the first fill-in field – "Any DES Interest Id" – enter the site number.
  • Click “Enter.”

If you don’t know the Site Number, you can also search by other identifying information, such as town, in the appropriate boxes.