Learn about how MassDEP is addressing the presence of per- and polyfluoroalkyl substances (PFAS) in drinking water.

A list of structures (and other identifiers) of possible per- and polyfluoroalkyl substances (PFAS). The data provided in the PFAS Suspect List has been aggregated from public sources and users, including peer-reviewed literature, patent literature, and public websites. Therefore, the quality and accuracy of the compound names, structures, and other properties have not been validated. The National Institute of Standards & Technology does not endorse or provide any assessment of confidence with the information provided.

PFAS Data for Municipal Impact from residential pump stations and septage. This dataset is associated with the following publication: Penrose, M., J. Deighton, S.T. Glassmeyer, A. Brougham, S.M. Bessler, T. McKnight, and M. Ateia. Elevated PFAS Precursors in Septage and Residential Pump Stations. Environmental Science & Technology Letters. American Chemical Society, Washington, DC, USA, 12(4): 454-460, (2025).

*The data for this dataset is updated daily. The date(s) displayed in the details section on our Open Data Portal is based on the last date the metadata was updated and not the refresh date of the data itself.*The Florida Department of Environmental Protection (DEP) is committed to the protection of the groundwater resources of the state and the public health and safety of our residents. As part of these efforts, DEP’s Division of Waste Management routinely investigates sites where there is known or suspected soil and groundwater contamination statewide.The Division of Waste Management has begun investigations to determine potential sources and environmental impacts related to per- and polyfluoroalkyl substances (PFAS). PFAS are a large class of complex man-made chemicals that have been used in a wide range of consumer and industrial products. Perfluorooctanoic acid (PFOA) and Perfluorooctane sulfonate (PFOS) are part of the larger group of PFAS chemicals. While no longer manufactured in the United States, PFOA and PFOS were extensively used and manufactured since the 1940’s. Common uses of PFAS included, stain and water repellents used in textile manufacturing, paper products, food packaging, and cookware. PFAS has also been used in numerous industrial processes, and in the formulation of fire suppressant foams. PFAS are stable chemicals that do not naturally degrade. When released to the environment, PFAS can cause contamination to soil, groundwater, and surface water and these impacts may pose a risk to public health and the environment.DEP will continue its efforts to investigate and understand PFAS in the environment and the ecological and human health risks associated with PFAS contamination. This web page will be dedicated to making PFAS information readily available and accessible to the public regarding DEP’s efforts. DEP is committed to providing timely information to the public regarding these efforts.The Florida Department of Environmental Protection (DEP) is committed to the protection of the groundwater resources of the state and the public health and safety of our residents. As part of these efforts, DEP’s Division of Waste Management routinely investigates sites where there is known or suspected soil and groundwater contamination statewide.The Division of Waste Management has begun investigations to determine potential sources and environmental impacts related to per- and polyfluoroalkyl substances (PFAS). PFAS are a large class of complex man-made chemicals that have been used in a wide range of consumer and industrial products. Perfluorooctanoic acid (PFOA) and Perfluorooctane sulfonate (PFOS) are part of the larger group of PFAS chemicals. While no longer manufactured in the United States, PFOA and PFOS were extensively used and manufactured since the 1940’s. Common uses of PFAS included, stain and water repellents used in textile manufacturing, paper products, food packaging, and cookware. PFAS has also been used in numerous industrial processes, and in the formulation of fire suppressant foams.PFAS are stable chemicals that do not naturally degrade. When released to the environment, PFAS can cause contamination to soil, groundwater, and surface water and these impacts may pose a risk to public health and the environment.DEP will continue its efforts to investigate and understand PFAS in the environment and the ecological and human health risks associated with PFAS contamination. This web page will be dedicated to making PFAS information readily available and accessible to the public regarding DEP’s efforts. DEP is committed to providing timely information to the public regarding these efforts.

ZeroPM partners are continuously building a database of alternatives to persistent, mobile and toxic (PMT) substances, and to per- and polyfluoroalkyl substances (PFAS). The current version available focuses on alternatives to PFAS. The ZeroPM alternative assessment database is currently available as a beta-version. It will be continuously updated as we obtain more information on alternatives to PFAS and other PMT substances.

For information about the database, please visit: https://zeropm.eu/alternative-assessment-database/

This dataset consists of summary data for potential landscape sources of per- and poly-fluoroalkyl substances (PFAS). These summary items include facilities from the Environmental Protection Agency (EPA) PFAS Analytics Tools, which were pulled from its Enforcement and Compliance History Online (ECHO), areas affected by fires (burned and urban burned areas) from Monitoring Trends in Burn Severity (MTBS), and landcover data from National Land Cover Dataset (NLCD) and Coastal Change Analysis Portal (C-CAP) around sites sampled as part of a National PFAS Tapwater Reconnaissance. These data are presented as a comma separated file, which includes summaries for all variables listed within a 5-kilometer buffer around each site, with an additional summary of burn areas within a 50-kilometer buffer. The purpose of this effort is to identify and quantify PFAS in drinking water sources at the point-of-use across the United States (US) and these data will be used to identify potential landscap ...

Concentrations of inorganic constituents, dissolved organic carbon (DOC), tritium, per- and polyfluoroalkyl substances (PFAS), volatile organic compounds (VOCs), and pharmaceuticals were measured in groundwater samples collected from 254 wells in 2019 and 2020. Concentrations of inorganic constituents, DOC, VOCs, and pharmaceuticals were measured at the U.S. Geological Survey (USGS) National Water Quality Laboratory in Lakewood, Colorado. Concentrations of tritium were measured at the USGS Tritium Laboratory in Menlo Park, California. Concentrations of PFAS were measured at SGS Laboratory in Orlando, Florida. In addition, several geospatial parameters were determined, including: percentages of selected land uses within 500-meter buffers around sampled wells, nitrogen loading from septic systems within 500-meter buffers around sampled wells, distance to nearest wastewater treatment plant, and distance to selected industry and other potential point sources that could be sources of PFAS to the environment. The data were collected as part of the USGS National Water-Quality (NAWQA) project. This data release contains 12 tables of well information, laboratory results, geospatial output, and a data dictionary, including: 1) PFAS_Data_Dictionary.csv – Parameters in each table are defined in this table. 2) PFAS_BLANK.csv – Concentrations of PFAS in equipment, field, and source-solution blank samples. 3) PFAS_ENV.csv – Concentrations of PFAS in environmental samples. 4) PFAS_GEOSPATIAL.csv – Percentages of selected land uses within 500-meter buffers around sampled wells; nitrogen loading from septic systems within 500-meter buffers around sampled wells; distance to nearest wastewater treatment plant; distance to selected industry and other potential point sources that could be sources of PFAS to the environment. 5) PFAS_INORGANICS_AND_OTHER.csv – Concentration of inorganic constituents, DOC, and tritium. 6) PFAS_LAB_BLANK.csv – Concentrations of PFAS in laboratory blank samples. 7) PFAS_PHARMA.csv – Concentrations of pharmaceutical compounds in environmental samples. 8) PFAS_REP.csv – Concentrations of PFAS in replicate samples. 9) PFAS_SPIKE_FIELD.csv – Percent recovery for PFAS in field matrix-spike samples. 10) PFAS_SPIKE_LAB.csv – Percent recovery for PFAS in laboratory reagent-spike and matrix-spike samples. 11) PFAS_VOCs.csv – Concentrations of VOCs in environmental samples. 12) PFAS_WELLS.csv – Site characteristics of the sampled wells.

Data here contain and describe an open-source structured query language (SQLite) portable database containing high resolution mass spectrometry data (MS1 and MS2) for per- and polyfluorinated alykl substances (PFAS) and associated metadata regarding their measurement techniques, quality assurance metrics, and the samples from which they were produced. These data are stored in a format adhering to the Database Infrastructure for Mass Spectrometry (DIMSpec) project. That project produces and uses databases like this one, providing a complete toolkit for non-targeted analysis. See more information about the full DIMSpec code base - as well as these data for demonstration purposes - at GitHub (https://github.com/usnistgov/dimspec) or view the full User Guide for DIMSpec (https://pages.nist.gov/dimspec/docs). Files of most interest contained here include the database file itself (dimspec_nist_pfas.sqlite) as well as an entity relationship diagram (ERD.png) and data dictionary (DIMSpec for PFAS_1.0.1.20230615_data_dictionary.json) to elucidate the database structure and assist in interpretation and use.

An extreme gradient boosting ensemble tree model predicting per- and polyfluoroalkyl substances (PFAS) occurrence in groundwater at the depths typical of the bottom of public and domestic drinking water supplies across the conterminous United States was developed. PFAS data used to train the model were collected between 2019 and 2022 by the U.S. Geological Survey National Water Quality Network, Groundwater and the California Groundwater Ambient Monitoring and Assessment Program – Priority Basin Project. This dataset contains concentrations of PFAS, volatile organic compounds (VOCs), pharmaceuticals, and tritium in groundwater, along with associated quality assurance and quality control data. Concentrations of VOCs and pharmaceuticals were measured at the U.S. Geological Survey (USGS) National Water Quality Laboratory in Lakewood, Colorado. Concentrations of PFAS were measured at SGS North America Inc. - Environment Health & Safety in Orlando, Florida. Concentrations of tritiu ...

The California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP) analyzed for per-and polyfluoroalkyl substances (PFAS) in groundwater samples collected from domestic and public drinking water supply wells in California. GAMA-PBP is a cooperative program between the U.S. Geological Survey and the California State Water Resources Control Board. This data release contains data for samples collected from May 2019 through December 2022 and includes revisions to earlier data (Kent, 2021) that were either screened or removed after analysis of quality-control data. Please see the quality-control and other descriptions of the data in the processing steps in the xml file. Subsequent updates will include data for samples collected after December 2022. Data are also publicly available for download from Jurgens and others (2018). The dataset consists of 4 tables. Table 1 lists the names and abbreviations of the twenty-eight PFAS constituents analyzed ...

Per- and polyfluoroalkyl substances (PFAS) are a class of man-made chemicals of global concern for many health and regulatory agencies due to their widespread use and persistence in the environment (in soil, air, and water), bioaccumulation, and toxicity. This concern has catalyzed a need to aggregate data to support research efforts that can, in turn, inform regulatory and statutory actions. An ongoing challenge regarding PFAS has been the shifting definition of what qualifies a substance to be a member of the PFAS class. There is no single definition for a PFAS, but various attempts have been made to utilize substructural definitions that either encompass broad working scopes or satisfy narrower regulatory guidelines. Depending on the size and specificity of PFAS substructural filters applied to the U.S. Environmental Protection Agency (EPA) DSSTox database, currently exceeding 900,000 unique substances, PFAS substructure-defined space can span hundreds to tens of thousands of compounds. This manuscript reports on the curation of PFAS chemicals and assembly of lists that have been made publicly available to the community via the EPA’s CompTox Chemicals Dashboard. Creation of these PFAS lists required the harvesting of data from EPA and online databases, peer-reviewed publications, and regulatory documents. These data have been extracted and manually curated, annotated with structures, and made available to the community in the form of lists defined by structure filters, as well as lists comprising non-structurable PFAS, such as polymers and complex mixtures. These lists, along with their associated linkages to predicted and measured data, are fueling PFAS research efforts within the EPA and are serving as a valuable resource to the international scientific community.

Analytical and field sampling data for each 2018-2019 NRSA Fish Tissue Study chemical contaminant are provided, along with a data dictionary that describes the contents of each data file. All results for the fillet tissue concentrations are reported on a wet weight basis. All the fish fillet samples analyzed contained detectable levels of mercury and PCBs, and PFAS were detected in 95% of the fillet samples. This dataset is associated with the following publication: Stahl, L., B.D. Snyder, H.B. McCarty, T. Kincaid, A. Olsen, T.R. Cohen, and J. Healey. Contaminants in Fish from U.S. Rivers: Probability-Based National Assessments. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier BV, AMSTERDAM, NETHERLANDS, 861(25): 160557, (2023).

Fish can be used to indicate the ecological status of a river. These data were produced from the same samples collected as part of the routine sampling and analysis undertaken by the Environment Agency as part of its “WFD Classification Status” in 2022 and these data may be considered in combination.

This dataset includes per-and polyfluoroalkyl substances (PFAS) and pharmaceuticals monitored at 62 sampling sites in tributaries of the Laurentian Great Lakes. Chemicals were evaluated in a sediment sample (PFAS only) and water concentrations were estimated using polar organic chemical integrative samplers (POCIS). Sediment samples were collected from the 62 sites in June and July 2018, which were analyzed for 23 PFAS compounds using liquid chromatography tandem mass spectrometry (LC/MS/MS). Duplicate sediment samples were collected at 23 sites. Overall, 22 of the 23 sediment PFAS compounds analyzed were detected in samples from at least one site. Pharmaceuticals and PFAS samples were collected instream by deploying two POCIS at each site for approximately 30 days during the period of May through October 2018. POCIS were compromised at two sites, so POCIS data are only included for 60 of the 62 sites. POCIS blanks and replicates were also collected at six sites. Replicate POCIS w ...

This data release includes concentrations of 24 per- and polyfluoroalkyl substances (PFAS) and physical properties of water-quality samples collected by the U.S. Geological Survey (USGS) at 64 selected sites in rivers and streams in Massachusetts over three rounds of sampling. The samples were collected from August to November 2020 when streamflow conditions were below normal (also considered to be base-flow conditions) at rivers and streams in urban areas that receive treated wastewater from municipal wastewater-treatment facilities, and in rural rivers and streams that are not associated with municipal wastewater discharges and may have other source inputs of PFAS. The measured physical properties include water temperature, specific conductance, pH, dissolved oxygen, and turbidity and the quality-control data from blanks, replicates, laboratory control samples, and laboratory spike samples are provided. The physical properties, along with all of the discrete water-quality PFAS d ...

We report the construction of a database of vetted infrared spectra specifically targeting volatile fluorocarbon gases that may be emitted during thermal treatment of per- and polyfluoroalkyl substances (PFAS) to assist understanding of treatment processes and improve quantification. To populate this database, protocols derived from the Pacific Northwest National Laboratory (PNNL) infrared spectral database are used, curtailing the species selection for this data set. Each spectrum in the database is a weighted average derived from 10 or more individual measurements at different partial pressures (static method) or flow rates (dissemination method) to yield good fidelity of both strong and weak infrared signatures, with each composite spectrum ranging from = 6500 cm-1 to = 600 cm-1 with an apodized resolution of 0.112 cm-1. This resolution was chosen to fully resolve all spectral features, recognizing that atmospheric pressure broadening results in nearly all ro-vibrational lines having linewidths = 0.1 cm-1. As an example case, application of the database is demonstrated via identification and quantification of dominant 1H-perfluoroheptane and perfluorohept-1-ene fluorocarbon products resulting from thermal decomposition of perfluorooctanoate (PFOA) below 450 °C.

This layer is intended for use in the Wisconsin PFAS Interactive Data Viewer GIS mapping application, use for any other purpose should be done with caution to avoid misuse or misinterpretation of information contained in this layer. Please seek appropriate DNR staff support.The sites shown here represent locations in Wisconsin where PFAS has been documented to be present. These are active Remediation & Redevelopment Program cleanup sites (NR700 sites). In some instances there maybe be multiple BRRTS cases associated with a single point in this layer. Consult the Bureau of Remediation and Redevelopment Tracking System (BRRTS on the Web) or DNR program staff for specific information.This layer includes only Open BRRTS cases, where action is required to address PFAS contamination.Most of the content shown in the Wisconsin PFAS Interactive Data Viewer's popup windows for this layer is additional information that does not exist in the BRRTS database and is manually added for these sites. As such, there may be a delay from PFAS sites being listed in BRRTS and shown on this map. Generally, this delay should be less than two weeks. For more information, contact the Remediation & Redevelopment Program.

The Michigan Publicly Owned Treatment Works PFAS data includes wastewater treatment plants (WWTPs) permitted by EGLE through the National Pollutant Discharge Elimination System (NPDES) or the Groundwater Discharge program where there is PFAS data for their respective discharge point to surface water or groundwater. The majority of the PFAS data is collected by the WWTPs and submitted via the MiEnviro Portal. There is also PFAS data for WWTPs collected by EGLE Water Resources Division (WRD) staff as part of routine compliance inspections. The data will be updated periodically as additional WWTPs obtain PFAS data for their permitted discharges.

For more information regarding this data, visit the PFAS Response-Wastewater Treatment Plants page and the Michigan Department of Environment, Great Lakes, and Energy IPP PFAS Initiative page. For content related questions, please reach out to Anne Tavalire, TavalireA@Michigan.gov.Field Descriptions

Field Name

Field Alias

Field Description

Name

Name

Wastewater Treatment Plant Designated Name

MiEnviroURL

MiEnviro URL

MiEnviro Site Map Explorer Link

PermitNumber

Permit Number

NPDES or Groundwater Discharge Permit Number

County

County

County

District

District

EGLE WRD District

DischargeType

Discharge Type

Surface Water or Groundwater Discharge

NPDESOutfall

Outfall (NPDES Only)

NPDES Permitted Discharge Outfall

ReceivingWaterbody

Receiving Waterbody

Receiving Waterbody

ApprovedIPP

Has Approved Industrial Pretreatment Program?

Has Approved Industrial Pretreatment Program?

EGLEContact

EGLE Contact

EGLE Contact Name

ContactPhone

Contact Phone

EGLE Contact Phone Number

ContactEmail

Contact Email

EGLE Contact Email Address

Longitude

Longitude

Longitude: Location of NPDES Permitted Outfall or Groundwater Discharge Wastewater Treatment Plant

Latitude

Latitude

Latitude: Location of NPDES Permitted Outfall or Groundwater Discharge Wastewater Treatment Plant

ExceedsGwCleanUpCriteria

Generic Groundwater Clean Up Criteria ExceedanceExceedance of Part 201 Groundwater Protective of Drinking Water Criteria (any analyte)

Datafiles in TXT file formats listing PFAS chemicals and a list of all PFAS Chemical Lists publicly available on the CompTox Chemicals Dashboard.

This dataset is associated with the following publication: Williams, A., L. Gaines, C. Grulke, C. Lowe, G. Sinclair, V. Samano, I. Thillainadarajah, B. Meyer, G. Patlewicz, and A. Richard. Assembly and Curation of Lists of Per- and Polyfluoroalkyl Substances (PFAS) to Support Environmental Science Research. Frontiers in Environmental Science. Frontiers, Lausanne, SWITZERLAND, 10: 850019, (2022).

Dataset Description This dataset was produced within the framework of Horizon 2020 Framework Programme, Project PROMISCES (Preventing Recalcitrant Organic Mobile Industrial chemicalS for Circular Economy in the Soil-sediment-water system). Project website: https://promisces.eu/ The dataset contains information on the environmental concentrations of Per- and Polyfluoroalkyl substances (PFASs) collected as part of the PROMISCES project's Case Study #2, Subtask 2.2.4 – Large catchment scale monitoring in different environmental compartments. It also includes data gathered from various external sources. Abstract PFASs are a group of synthetic chemicals widely used in various household and industrial applications (Glüge et al., 2020). Due to their high chemical stability, PFASs are resistant to natural degradation processes, leading to their accumulation in different environmental matrices and ultimately posing potential health risks to humans (Sunderland et al., 2019). PROMISCES CS#2 focused on understading the fate and transport of PFASs in the upper Danube catchment, covering the Danube from its source to the city of Budapest. Over approximately 1.5 years, a comprehensive monitoring campaign was conducted in this study area, across multiple environmental compartments: Atmopsheric Deposition: River water: including Danube mainstream and its tributaries. Groundwater: including bank-filtered water from the Danube, and groundwater directly influenced by the landfills Landfill leachate Surface Runoff Wastewater: Influent and effluent from municipal waterwater treatment plants (WWTPs) and direct industrial dischargers Particularly, the case study placed a special focus on the Danube and its bank filtration sites at two major cities in the Upper Danube, Vienna and Budapest. The dataset primarily consists results from targeted analysis of 32 individual PFAS substances. In addition, available data for these 32 PFASs in the study area were collected from various online resources or provided directly by project partners. For confidentiality reasons, some external data have been anonymized on names and locations. Partial of this dataset have already contributed to a 2023 publication (Liu et al.), which was based on preliminary data before the completion of the full monitoring campaign and external data collection. Technical Details This dataset includes: A Zip file containing .accdb Microsoft Access database A ZIP file containing .csv files structured to match the database Database structure One query is created to show most important information: Concentrations_PFAS: contains all PFAS concentration data. In addition, tables were provided with more infomation on the metadata: Table1_measurements: concentrations data with units, values, limit of quantifications (LOQs); keys indicating relationships with other tables. Table2_samplings: sample codes, sampling times (if available), sampling type, sampling techniques; key indiating relationships with Table7_analytical_methods. Table3_samples: sample names, sample sites, coordinates and coordinate systems (if available). Table4_compartments: sample matrices/compartments, more detailed sample types. Table5_compounds: CAS numbers, substance short names, Sus Dat IDs, substance names in NORMAN database, substance group short names and long names. Table6_datasources: data source names, organisations, countries, references, links. Table7_analytical_methods: laboratories, preparation methods, analytical methods, analytical method standards. References Glüge, J., Scheringer M., Cousins I., DeWitt J., Goldenman G., Herzke D., Lohmann R., Ng A., Trier X., Wang Z (2020) An Overview of the Uses of Per- and Polyfluoroalkyl Substances (PFAS). Environmental Science: Processes & Impacts 12. https://doi.org/10.1039/D0EM00291G Liu, M., Saracevic, E., Kittlaus, S., Oudega, T., Obeid, A., Nagy-Kovács, Z., László, B., Krlovic, N., Saracevic, Z., Lindner, G., Rab, R., Derx, J., Zoboli, O., Zessner, M. (2023) PFAS-Belastungen im Einzugsgebiet der oberen Donau. Österr Wasser- und Abfallw 75, 503–514 . https://doi.org/10.1007/s00506-023-00973-x Sunderland, Elsie M., Xindi C. Hu, Clifton Dassuncao, Andrea K. Tokranov, Charlotte C. Wagner, and Joseph G. Allen. (2019) A Review of the Pathways of Human Exposure to Poly- and Perfluoroalkyl Substances (PFASs) and Present Understanding of Health Effects. Journal of Exposure Science & Environmental Epidemiology 29, no. 2 : 131–47. https://doi.org/10.1038/s41370-018-0094-1