{"hq_id":"hq-p-hom-000190","name":"House Dust (Integrated Chemical Exposure Biomarker)","category":{"primary":"household","secondary":"indoor_environment","tags":["house dust","PBDE","phthalate","lead","pesticide","flame retardant","biomarker"]},"product_tier":"HOM","overall_risk_level":"moderate","description":"Settled house dust is an integrated biomarker of indoor chemical exposure — it accumulates PBDE flame retardants (from furniture foam), phthalate plasticizers (from vinyl flooring, electronics), lead (from paint, soil track-in), pesticide residues, per/polyfluorinated substances (PFAS), and microplastics. Children ingest 50-100 mg of dust daily through hand-to-mouth behavior. House dust composition reflects all products and materials in the home — making it a whole-home chemical exposure indicator.","synthesis":{"derived_risk_level":"moderate_to_high","synthesis_confidence":0.737,"synthesis_method":"compound_composition","context_used":"human_infant","context_source":"product_users","exposure_modifier":1.4,"vulnerability_escalated":true,"escalation_reason":"Infant exposure group","compounds_resolved":4,"compounds_total":4,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"sensitive_populations":"infants and toddlers (50-100 mg dust ingestion daily)","overall_risk":"moderate","primary_concerns":["Average US house dust contains 45+ toxic chemicals (NRDC/Silent Spring)","Children ingest 50-100 mg dust daily via hand-to-mouth behavior","PBDEs from furniture foam: US dust levels 10-100x higher than European homes","House dust is an integrated marker of ALL indoor chemical exposures"],"exposure_routes":"Oral (hand-to-mouth, especially children); inhalation (resuspended dust); dermal"},"exposure":{"routes":["oral","inhalation","dermal"],"contact_types":["oral_direct","inhalation","skin_brief"],"users":["adult","child","infant"],"duration":"continuous","frequency":"daily","scenarios":["Children ingesting 50-100 mg dust daily via hand-to-mouth","Infant crawling on floor in maximum dust concentration zone","Dust resuspension during vacuuming, walking, HVAC operation","House dust reflecting cumulative chemical load of all home products"],"notes":"NRDC/Silent Spring Institute: US house dust contains an average of 45 different toxic chemicals. Wet mopping is more effective than dry sweeping (reduces resuspension). HEPA vacuum captures fine particles that pass through standard vacuum filters. Removing shoes at door reduces lead and pesticide track-in by 60%+. Replacing FR-treated furniture and PVC flooring is the most effective source reduction strategy."},"consumer_guidance":{"usage_warning":"Wet mop hard floors weekly (more effective than sweeping). Vacuum carpets 2x weekly with HEPA-filtered vacuum. Remove shoes at door (reduces lead and pesticide track-in 60%+). Wash hands before eating. Replace FR-treated furniture with FR-free alternatives. Choose hard flooring over carpet where practical.","safer_alternatives":["HEPA vacuum (captures fine particles standard vacuums exhaust)","Wet mopping (prevents dust resuspension during cleaning)","Shoes-off policy at door (60%+ reduction in tracked-in contaminants)","Source reduction: replace FR furniture, PVC flooring, lead paint"],"red_flags":[{"indicator":"Visible mold, persistent chemical odor, or symptoms when home","meaning":"Indoor air quality issue requiring investigation.","action":"Test air quality. Address moisture sources. Improve ventilation."}],"green_flags":[{"indicator":"GREENGUARD Gold, CRI Green Label Plus, or equivalent IAQ certification","meaning":"Product tested for low chemical emissions.","verification":"Check for IAQ certification marks on packaging or manufacturer website."}],"what_to_ask":[{"question":"What is the VOC emission profile of this product?","why_it_matters":"Indoor air quality is #1 modifiable environmental health factor — 90% of time spent indoors.","good_answer":"GREENGUARD Gold certified or emission testing data available.","bad_answer":"No emission testing or IAQ certification."}],"alternatives":[{"name":"HEPA vacuum","notes":"captures fine particles standard vacuums exhaust"},{"name":"Wet mopping","notes":"prevents dust resuspension during cleaning"},{"name":"Shoes-off policy at door","notes":"60%+ reduction in tracked-in contaminants"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"EPA Lead Dust Standards (40 CFR 745)","citation":"40 CFR 745","requirements":"Lead dust clearance levels: floors 10 μg/ft², windowsills 100 μg/ft². Updated 2024 from previous 40/250 levels.","compliance_status":null,"effective_date":"2024-07-01","enforcing_agency":"EPA","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":[],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":false,"disposal_guidance":"HEPA vacuum bag: sealed in plastic bag, regular waste.","hazardous_waste":false,"expected_lifespan":"continuous"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000223","name":"Decabromodiphenyl ether (DecaBDE / BDE-209)","role":"dust_contaminant","concentration_pct":"100-10000 ng/g"},{"hq_id":"hq-c-org-000007","name":"Di-2-ethylhexyl phthalate","role":"dust_contaminant","concentration_pct":"10-1000 ug/g"},{"hq_id":"hq-c-ino-000001","name":"Lead (Pb)","role":"dust_contaminant","concentration_pct":"10-1000 ug/g"},{"hq_id":"hq-c-org-000020","name":"PFOA (Perfluorooctanoic acid)","role":"dust_contaminant","concentration_pct":"1-100 ng/g"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000223","compound_name":null,"role":"dust_contaminant","typical_concentration":"100-10000 ng/g"},{"hq_id":"hq-c-org-000007","compound_name":null,"role":"dust_contaminant","typical_concentration":"10-1000 ug/g"},{"hq_id":"hq-c-ino-000001","compound_name":null,"role":"dust_contaminant","typical_concentration":"10-1000 ug/g"},{"hq_id":"hq-c-org-000020","compound_name":null,"role":"dust_contaminant","typical_concentration":"1-100 ng/g"}],"identifiers":{"common_names":["house dust (integrated chemical exposure biomarker)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Skip Hop","manufacturer":"Carter's Inc.","market_position":"mass_market","notable":"Designer play mat brand"},{"brand":"Baby Care","manufacturer":"Baby Care","market_position":"premium","notable":"Large foam play mats"},{"brand":"Lollaland","manufacturer":"Lollaland","market_position":"premium","notable":"Non-toxic play surface"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"EPA Lead Dust Standards (40 CFR 745)","jurisdiction":"USA","year":2024,"citation":"40 CFR 745","id":"src_a839b9e2"},{"id":"stockholm_decabde_2017","type":"regulatory","title":"Stockholm Convention: Decabromodiphenyl Ether (DecaBDE) Listed under Annex A (Elimination), COP-8 Decision SC-8/12, Debromination Concern, Arctic Contamination, RoHS Interaction, Aircraft Exemptions (2017)","year":2017,"inherited_from_compound":"hq-c-org-000223"},{"id":"eu_rohs_decabde","type":"regulatory","title":"EU Directive 2011/65/EU (RoHS Recast): DecaBDE Restricted in EEE; DecaBDE REACH SVHC Identification; Debromination Products BDE-47/BDE-99 Metabolite Pathway in Humans and Wildlife (2011)","year":2011,"inherited_from_compound":"hq-c-org-000223"},{"type":"report","citation":"Environmental Working Group. Polluted Pets: High Levels of Toxic Industrial Chemicals Contaminate Cats and Dogs. 2008.","url":"https://www.ewg.org/research/polluted-pets","id":"ewg_2008","inherited_from_compound":"hq-c-org-000007"},{"type":"report","citation":"Danish Ministry of the Environment. Survey of phthalates in dog toys. 2006.","id":"danish_study","inherited_from_compound":"hq-c-org-000007"},{"id":"src_001","type":"cdc","title":"CDC - Lead Poisoning Prevention","url":"https://www.cdc.gov/lead-prevention/","accessed":"2026-01-13","relevance":"Blood lead reference values, no safe level doctrine","inherited_from_compound":"hq-c-ino-000001"},{"id":"src_002","type":"who","title":"WHO - Lead Poisoning Fact Sheet","url":"https://www.who.int/news-room/fact-sheets/detail/lead-poisoning-and-health","year":2024,"accessed":"2026-01-13","relevance":"Global burden statistics, health effects","inherited_from_compound":"hq-c-ino-000001"},{"id":"iarc_135","type":"regulatory","title":"IARC Monographs Volume 135: Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonic Acid (PFOS)","year":2023,"inherited_from_compound":"hq-c-org-000020"},{"id":"epa_pfoa_2024","type":"regulatory","title":"US EPA: PFAS National Primary Drinking Water Regulation; PFOA MCL 4 ppt, MCLG zero","year":2024,"inherited_from_compound":"hq-c-org-000020"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:28:33.634Z"}}