{"hq_id":"hq-c-org-000020","name":"PFOA (Perfluorooctanoic acid)","context":"human_adult","timestamp":"2026-10-27T20:56:07.981Z","derived_by":{"label":"ALETHEIA-derived","engine":{"commit":"a1c6e861599cc34c5db0318ea1a7ac13a327e074","commit_source":"vercel_env","tree_clean":null},"params":{"sha256":"88ae43137e58ed0cd65588409efefee0d90253da01ef4459bf9ee25f888ec9a0","files":["axes.json","context-specificity.json","regulatory-mappings.json","synthesis-params.json","thresholds.json"]},"clock":{"year":2026},"inputs":[{"id":"hq-c-org-000020","sha256":"0f1d525afd114940c25175b0fdf1a04084c8ed96a330c23210d9742d61d2607a"}]},"risk_level":"severe","risk_profile":{"magnitude":{"mean":0.790593,"weightedMean":0.790593,"std_dev":0.119909,"confidence_interval_95":[0.625,0.95],"source_positions":[{"source":"IARC","year":2023,"value":0.95,"weight":0.45018},{"source":"EPA CTX / CalEPA","year":2021,"value":0.8,"weight":0.30176},{"source":"US EPA","year":2016,"value":0.75,"weight":0.41},{"source":"HQ_DIRECT","year":2026,"value":0.625,"weight":0.35}]},"confidence":{"mean":0.745923,"weightedMean":0.745923,"std_dev":0.134971,"confidence_interval_95":[0.5,0.82],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.5,"weight":0.35},{"source":"IARC","year":2023,"value":0.82,"weight":0.45018},{"source":"US EPA","year":2016,"value":0.82,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":0.82,"weight":0.30176}]},"recency":{"mean":0.60399,"weightedMean":0.60399,"std_dev":0.226387,"confidence_interval_95":[0.368,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":1,"weight":0.35},{"source":"IARC","year":2023,"value":0.549,"weight":0.45018},{"source":"US EPA","year":2016,"value":0.5,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":0.368,"weight":0.30176}]},"methodology":{"mean":0.930553,"weightedMean":0.930553,"std_dev":0.126536,"confidence_interval_95":[0.7,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.7,"weight":0.35},{"source":"IARC","year":2023,"value":1,"weight":0.45018},{"source":"US EPA","year":2016,"value":1,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":1,"weight":0.30176}]},"specificity":{"mean":0.789353,"weightedMean":0.789353,"std_dev":0.071703,"confidence_interval_95":[0.75,0.92],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.92,"weight":0.35},{"source":"IARC","year":2023,"value":0.75,"weight":0.45018},{"source":"US EPA","year":2016,"value":0.75,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":0.75,"weight":0.30176}]},"consensus":{"exists":false,"strength":0.200607,"disagreement_magnitude":0.325677,"warning":null}},"interpretation":{"summary":"Regulatory agencies show substantial disagreement. IARC classifies as higher risk (95th percentile), while HQ_DIRECT concludes lower risk (63th percentile).","confidence_note":"Moderate-quality evidence base. Disagreement reflects methodological and interpretive differences, not data quality issues.","context_note":null,"warning":null},"sources":[{"id":"iarc_135","type":"regulatory","title":"IARC Monographs Volume 135: Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonic Acid (PFOS)","year":2023,"url":"https://www.ncbi.nlm.nih.gov/books/NBK614282/"},{"id":"epa_pfoa_2024","type":"regulatory","title":"US EPA: PFAS National Primary Drinking Water Regulation; PFOA MCL 4 ppt, MCLG zero","year":2024,"url":"https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas"},{"id":"r60-2026-09-30-d918-oehha-prop65-list-csv-own-url","type":"regulatory","title":"PROPOSITION 65 LIST OF CARCINOGENS OR REPRODUCTIVE TOXICANTS","year":2026,"url":"https://oehha.ca.gov/sites/default/files/media/2025-01/p65chemicalslist.csv"},{"id":"r60-2026-09-26-d867-cc1-iarc-list-of-classifications-loc-app","type":"regulatory","title":"IARC Monographs, List of Classifications","year":2026,"url":"https://monographs.iarc.who.int/list-of-classifications"},{"id":"r60-2026-10-01-echa-annex-vi-clp-table-atp23-xlsx","type":"regulatory","title":"ECHA Annex VI to CLP: the unofficial Excel table (up to and including the 23rd ATP) (secondary: unofficial by its own statement)","url":"https://echa.europa.eu/documents/10162/17218/annex_vi_clp_table_atp23_en.xlsx/b3816c13-81a3-816d-773a-62e88c4e2700?t=1761727004499"},{"id":"r60-2026-10-01-dd54-pops-all-pops","type":"regulatory","title":"Stockholm Convention: All POPs (the Convention's own list of listed chemicals, Annexes A, B and C)","url":"https://www.pops.int/TheConvention/ThePOPs/AllPOPs/tabid/2509/Default.aspx"},{"id":"r60-2026-10-01-dd54-pops-new-pops","type":"regulatory","title":"Stockholm Convention: The New POPs (the Convention's own index of listed chemicals)","url":"https://www.pops.int/TheConvention/ThePOPs/TheNewPOPs/tabid/2511/Default.aspx"},{"id":"src_pubchem_tox_9554","type":"pubchem","title":"PubChem: Toxicity section (CID 9554)","url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/9554/JSON?heading=Toxicity"},{"id":"r60-2026-10-08-d974-tedx-list-full-export","type":"reference_database","title":"TEDX List of Potential Endocrine Disruptors, full export (Excel from the publisher's own search, operator-saved 2026-10-08; list last updated September 2018)","url":"https://endocrinedisruption.org/interactive-tools/tedx-list-of-potential-endocrine-disruptors/search-the-tedx-list"},{"id":"ctx_pred_dtxsid8031865","type":"reference","title":"EPA CompTox CTX API: predicted properties for DTXSID8031865 (PFOA (Perfluorooctanoic acid))","url":"https://comptox.epa.gov/ctx-api/chemical/property/predicted/search/by-dtxsid/DTXSID8031865"}],"sources_scope":"context","derived_markers":[],"warnings":["year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:ECHA (CLP Annex VI):eye irritation: eye dam. 1","unmapped_classification:Australia, as recorded by ToxValDB:eye irritation: eye irritation - category 2a (scor","unmapped_classification:Japan, as recorded by ToxValDB:eye irritation: category 1 (score: very high)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: category 2 (score: high)","unmapped_classification:New Zealand, as recorded by ToxValDB:eye irritation: category 8.3a (category 1) (score:","unmapped_classification:New Zealand, as recorded by ToxValDB:skin irritation: category 8.2c (category 1c) (scor"],"meta":{"synthesis_version":"1.1.0","config_version":"1.1.0","n_sources":4,"db_version":53,"warnings":["year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:ECHA (CLP Annex VI):eye irritation: eye dam. 1","unmapped_classification:Australia, as recorded by ToxValDB:eye irritation: eye irritation - category 2a (scor","unmapped_classification:Japan, as recorded by ToxValDB:eye irritation: category 1 (score: very high)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: category 2 (score: high)","unmapped_classification:New Zealand, as recorded by ToxValDB:eye irritation: category 8.3a (category 1) (score:","unmapped_classification:New Zealand, as recorded by ToxValDB:skin irritation: category 8.2c (category 1c) (scor"]},"schema":"synthesis","_notice":"ALETHEIA output is reference data, not professional advice. Not a substitute for primary agency sources or qualified professionals. See https://aletheia.holisticquality.io/disclaimer.","_disclaimer_url":"https://aletheia.holisticquality.io/disclaimer","available_contexts":["human_adult","human_child","human_pregnant","aquatic_life","human_teen","human_elderly","human_infant","exposure_dermal","exposure_inhalation","exposure_ingestion","exposure_ocular","occupational_exposure"]}