{"hq_id":"hq-p-out-000046","name":"Fire Pit and Wood Smoke Exposure","category":{"primary":"outdoor","secondary":"recreation","tags":["fire pit","wood smoke","PM2.5","PAH","carbon monoxide","campfire"]},"product_tier":"OUT","overall_risk_level":"moderate","description":"Outdoor fire pits and campfires burning wood, producing fine particulate matter (PM2.5), PAHs, carbon monoxide, acrolein, and volatile organic compounds. Sitting around a fire pit for 2-4 hours exposes individuals to PM2.5 levels equivalent to living in heavily polluted cities. Wood smoke is classified as 'probably carcinogenic' by IARC for indoor use.","synthesis":{"derived_risk_level":"moderate","synthesis_confidence":0.874,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.1,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":4,"compounds_total":4,"synthesis_date":"2026-03-27","synthesis_version":"1.0.0"},"hazard_summary":{"sensitive_populations":"children, asthmatics, pregnant women","overall_risk":"moderate","primary_concerns":["Fine particulate matter (PM2.5) causing acute respiratory irritation and long-term cardiovascular risk","PAHs from incomplete combustion — IARC Group 1 and 2B carcinogens","Carbon monoxide in poorly ventilated or enclosed fire areas"],"exposure_routes":"Inhalation of smoke and particulate matter"},"exposure":{"routes":["inhalation"],"contact_types":["inhalation"],"users":["adult","child"],"duration":"hours","frequency":"weekly","scenarios":["Sitting around fire pit for 2-4 hours (recreational exposure)","Cooking over open wood fire (additional food contamination)","Wind shifts directing smoke plume toward seated individuals"],"notes":"A 2-hour campfire exposure can deliver PM2.5 equivalent to 1-2 cigarettes. Children sit lower and closer to the fire, increasing their exposure. Damp or treated wood produces more smoke and additional toxic compounds."},"consumer_guidance":{"usage_warning":"Sit upwind of fire when possible. Do not burn treated, painted, or pressure-treated wood. Keep children back from direct smoke exposure. Avoid fire pits if you have asthma or respiratory conditions. Use only dry, seasoned hardwood.","safer_alternatives":["Propane or natural gas fire pits (no wood smoke particulates)","Electric outdoor heaters","Bioethanol fire features (cleaner combustion)"],"alternatives":[{"name":"Propane or natural gas fire pits","notes":"no wood smoke particulates"},{"name":"Electric outdoor heaters","notes":"Safer alternative to conventional products"},{"name":"Bioethanol fire features","notes":"cleaner combustion"}],"red_flags":[{"indicator":"Product used in enclosed or poorly ventilated space","meaning":"Chemical exposure concentrations increase dramatically in enclosed spaces.","action":"Use only in well-ventilated outdoor areas as intended."}],"green_flags":[{"indicator":"Third-party safety certification visible on packaging","meaning":"Product has been independently tested to applicable safety standards.","verification":"Look for certification logos (CPSIA, ASTM, EN, NSF, UL, OEKO-TEX)."}],"what_to_ask":[{"question":"What materials is this product made from?","why_it_matters":"Material composition determines chemical exposure potential.","good_answer":"Full material disclosure with known safe materials.","bad_answer":"No material information or unspecified."}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"EPA FIFRA / TSCA (as applicable)","citation":null,"requirements":"Pesticide registration under FIFRA. Chemical substances under TSCA.","compliance_status":null,"effective_date":null,"enforcing_agency":"EPA","penalties":null,"source_ref":null},{"jurisdiction":"USA -- California","regulation":"California Proposition 65","citation":null,"requirements":"Products containing listed chemicals require warnings.","compliance_status":null,"effective_date":null,"enforcing_agency":"OEHHA","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":true,"disposal_guidance":"Metal fire pits recyclable as scrap. Cool ash before disposal in regular waste.","hazardous_waste":false,"expected_lifespan":"3-10_years"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000029","name":"Benzo[a]pyrene","role":"combustion_product","concentration_pct":"trace"},{"hq_id":"hq-c-org-000043","name":"Carbon monoxide","role":"combustion_product","concentration_pct":"trace"},{"hq_id":"hq-c-org-000035","name":"Acrolein","role":"combustion_product","concentration_pct":"trace"},{"hq_id":"hq-c-org-000011","name":"Formaldehyde","role":"combustion_product","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000029","compound_name":null,"role":"combustion_product","typical_concentration":"trace"},{"hq_id":"hq-c-org-000043","compound_name":null,"role":"combustion_product","typical_concentration":"25-200 ppm"},{"hq_id":"hq-c-org-000035","compound_name":null,"role":"combustion_product","typical_concentration":"trace"},{"hq_id":"hq-c-org-000011","compound_name":null,"role":"combustion_product","typical_concentration":"trace"}],"identifiers":{"common_names":["fire pit and wood smoke exposure"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Solo Stove","manufacturer":"Solo Brands","market_position":"premium","notable":"Smokeless fire pit brand"},{"brand":"Blue Rhino","manufacturer":"Ferrellgas","market_position":"mass_market","notable":"Propane fire pit fuel"},{"brand":"Breeo","manufacturer":"Breeo","market_position":"premium","notable":"Double-wall smokeless fire pits"}],"sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"EPA FIFRA / TSCA (as applicable)","jurisdiction":"USA","id":"src_70a4d79c"},{"type":"regulation","title":"California Proposition 65","jurisdiction":"USA -- California","id":"src_fe1d5adc"},{"id":"iarc_100f_bap","type":"regulatory","title":"IARC Monographs Volume 100F: Benzo[a]pyrene — Chemical Agents and Related Occupations","year":2012,"inherited_from_compound":"hq-c-org-000029"},{"id":"epa_bap_iris","type":"regulatory","title":"US EPA IRIS: Benzo[a]pyrene — Toxicological Review (Final)","year":2017,"inherited_from_compound":"hq-c-org-000029"},{"id":"cdc_co_poisoning","type":"report","title":"CDC: Carbon Monoxide Poisoning — Facts and Prevention","year":2023,"inherited_from_compound":"hq-c-org-000043"},{"id":"atsdr_co","type":"report","title":"ATSDR Toxicological Profile for Carbon Monoxide","year":2012,"inherited_from_compound":"hq-c-org-000043"},{"id":"iarc_63_acrolein","type":"regulatory","title":"IARC Monographs Volume 63: Acrolein","year":1995,"inherited_from_compound":"hq-c-org-000035"},{"id":"epa_acrolein_iris","type":"regulatory","title":"US EPA IRIS: Acrolein — Provisional Toxicological Review (External Review Draft)","year":2003,"inherited_from_compound":"hq-c-org-000035"},{"id":"iarc_100f_form","type":"regulatory","title":"IARC Monographs Volume 100F: Formaldehyde","year":2012,"inherited_from_compound":"hq-c-org-000011"},{"id":"epa_form_iris","type":"regulatory","title":"US EPA IRIS Assessment: Formaldehyde (draft)","year":2010,"inherited_from_compound":"hq-c-org-000011"},{"type":"monograph","title":"International Agency for Research on Cancer (IARC)","jurisdiction":"International","id":"src_d9ebbaf2","extraction":"description_reference"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-01T14:25:58.615Z"}}