{"hq_id":"hq-p-hom-000058","name":"Radon in Residential Basements, Energy-Efficient Homes, and New Construction","category":{"primary":"household","secondary":"","tags":[]},"product_tier":"HOM","overall_risk_level":"low","description":"Radon kills more Americans per year than drunk driving. The fix is a pipe and a fan.","synthesis":{"derived_risk_level":"severe","synthesis_confidence":0.744,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":0.935,"vulnerability_escalated":false,"escalation_reason":null,"compounds_resolved":1,"compounds_total":1,"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":"Residents of homes above 4 pCi/L action level; smokers (10–25× increased risk); occupants of energy-efficient homes without radon mitigation","overall_risk":"low","primary_concerns":["Radon kills ~21,000 Americans per year from lung cancer (second only to smoking). Mitigation is simple (sub-slab depressurization, 90%+ effective) and cheap ($50 new construction, $800–$2,500 retrofit). Only 7 states require mitigation in new construction. 43 states do not. Regulatory gap is policy choice, not technical limitation."],"exposure_routes":"Inhalation of radon and alpha-emitting daughters in indoor air"},"exposure":{"routes":["dermal"],"contact_types":["dermal","inhalation"],"users":["adult","child"],"duration":"minutes","frequency":"weekly","scenarios":["Incidental mouthing or hand-to-mouth transfer by children"],"notes":"Exposure to Radon in Residential Basements, Energy-Efficient Homes, and New Construction occurs via dermal. Children and infants face higher exposure per body weight due to developing detoxification systems, higher surface-area-to-weight ratio, and behavioral factors (mouthing, crawling)."},"consumer_guidance":{"red_flags":[{"indicator":"Identified safety concern","meaning":"Radon kills ~21,000 Americans per year from lung cancer (second only to smoking).","action":"Review safety data; follow use guidelines; consider alternatives"}],"green_flags":[{"indicator":"EPA Safer Choice certified","meaning":"Meets EPA criteria for safer chemical ingredients","verification":"Look for EPA Safer Choice label on packaging"}],"what_to_ask":[{"question":"Is this product safe for use around children and pets?","why_it_matters":"Many household chemicals are formulated for adult use; children and pets have higher exposure per body weight and developing organ systems"}],"alternatives":[{"name":"Sub-slab depressurization systems","notes":"Active radon reduction systems more effective than passive methods"},{"name":"Crawl space encapsulation and venting","notes":"Reduces radon entry for homes with crawl spaces instead of basements"},{"name":"Improved home ventilation and air sealing","notes":"Combined approach reduces radon infiltration in energy-efficient homes"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"Consumer Product Safety Act (CPSA) + FHSA","citation":null,"requirements":"Household products must not present unreasonable risk of injury. Federal Hazardous Substances Act requires labeling of hazardous household products (corrosive, flammable, toxic, irritant).","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"USA","regulation":"EPA Safer Choice / Design for the Environment","citation":null,"requirements":"Voluntary program. Products meeting Safer Choice criteria can display the label. Requires disclosure of all ingredients and safer chemical alternatives.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"CLP Regulation (EC) No 1272/2008","citation":null,"requirements":"Classification, labelling, and packaging of hazardous chemical products. GHS-aligned hazard communication. Signal words, pictograms, and precautionary statements required.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null}],"certifications":[{"name":"CPSC General Safety","issuer":"CPSC","standard":"Consumer Product Safety Act","scope":"General consumer product safety requirements"}],"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":null,"disposal_guidance":"Varies by material; check local recycling guidelines","hazardous_waste":false,"expected_lifespan":"1-3_years"},"formulation":{"form":"composite_material","key_ingredients":[{"hq_id":null,"name":"Primary component","role":"base_material","concentration_pct":"70-80"},{"hq_id":null,"name":"Secondary component","role":"additive","concentration_pct":"10-20"},{"hq_id":null,"name":"Filler or coating","role":"filler","concentration_pct":"5-10"}],"certifications":[]},"materials":{"common":[{"material_id":"hq-m-env-000028","material_name":"Residential Radon Gas (Alpha-Particle Inhalation, Radium-226 Decay Chain)","component":null,"prevalence":"common"}],"concerning":[{"material_id":"hq-m-env-000028","concern":"Radon kills ~21,000 Americans per year from lung cancer (EPA estimate); 1 in 15 homes above 4 pCi/L action level; 43 states do not require mitigation in new construction; 26 states require real estate disclosure but do not mandate testing or remediation","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-env-000028","concern":"Mitigation cost ($50–$200 new construction; $800–$2,500 existing) is minimal; effectiveness 90%+; yet 43 states do not require it in new construction; regulatory gap is policy choice, not technical feasibility","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-env-000028","concern":"Energy-efficient building sealing paradox: net-zero and passive houses reduce air exchange, increasing radon accumulation if active mitigation not installed; unintended consequence of efficiency improvements","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-env-000028","concern":"Renter populations: typically no legal right to test results or remediation; landlord discretion on radon mitigation; disclosure laws vary by state","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-env-000028","concern":"Potential contaminant: Radon progeny (Po-218, Pb-214, Bi-214, Po-214)","compounds_of_concern":[],"source_refs":[]}],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-ino-000004","compound_name":"Radon-222 (Rn-222)","role":"base","typical_concentration":null}],"identifiers":{"common_names":["residential radon","basement radon","radon gas","radon accumulation"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Generic Mass-Market Brand A","manufacturer":"Consumer Products Corporation","market_position":"mass_market","notable":"Widely available mass-market option"},{"brand":"Generic Mass-Market Brand B","manufacturer":"Consumer Goods Ltd","market_position":"mass_market","notable":"Popular budget alternative"},{"brand":"Premium Brand A","manufacturer":"Premium Consumer Inc","market_position":"premium","notable":"Upscale premium positioning"},{"brand":"Professional Brand","manufacturer":"Professional Products Co","market_position":"professional","notable":"Professional/salon-grade option"},{"brand":"Specialty Eco-Brand","manufacturer":"Natural Products Ltd","market_position":"premium","notable":"Sustainable/natural product line"}],"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":[{"id":"src_001","type":"regulatory","title":"EPA Radon: Health Effects and Action Level (4 pCi/L)","year":2023},{"id":"src_002","type":"regulatory","title":"EPA Radon Mitigation Methods (Sub-slab Depressurization, 90%+ effective)","year":2020},{"id":"src_003","type":"regulatory","title":"State-by-State Radon Mitigation Requirements (7 states mandate; 43 do not)","year":2023}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:27:45.134Z"}}