{"hq_id":"hq-p-out-000044","name":"Artificial Grass (Synthetic Turf with Crumb Rubber Infill)","category":{"primary":"outdoor","secondary":"landscaping","tags":["artificial grass","crumb rubber","tire infill","lead","PAH","microplastic"]},"product_tier":"OUT","overall_risk_level":"moderate_to_high","description":"Synthetic turf fields and lawns with crumb rubber infill made from recycled tires. Crumb rubber contains PAHs, heavy metals (lead, zinc, cadmium), volatile organic compounds, and benzothiazole. Athletes and children playing on crumb rubber fields have measurably elevated exposure. EPA/CDC 2019 study found limited but non-zero cancer risk.","synthesis":{"derived_risk_level":"moderate","synthesis_confidence":0.749,"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":"2026-07-30","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":"children, adolescent athletes","overall_risk":"moderate_to_high","primary_concerns":["PAHs from recycled tire crumb rubber — multiple IARC carcinogens","Lead and heavy metals in tire-derived infill","Extreme surface temperatures accelerating chemical off-gassing"],"exposure_routes":"Dermal contact; inhalation of heated off-gassing; oral ingestion of particles"},"exposure":{"routes":["dermal","inhalation","oral"],"contact_types":["skin_prolonged","inhalation","oral_direct"],"users":["child","adult"],"duration":"hours","frequency":"weekly","scenarios":["Soccer, football, and field sports on crumb rubber (2-4 hours)","Skin abrasions on turf embedding crumb rubber in wounds","Inhalation of heated crumb rubber off-gassing on hot days","Accidental ingestion of crumb rubber particles (children)"],"notes":"Surface temperatures on synthetic turf reach 60-80C (140-180F) on hot days — 30-40C hotter than natural grass. Heat dramatically increases VOC off-gassing from crumb rubber. EPA/CDC FCRRS study (2019) found measurable but low cancer risk at typical exposure levels."},"consumer_guidance":{"usage_warning":"Shower and change clothes after playing on crumb rubber fields. Do not eat or drink on the field. Avoid play during peak heat when surface temperatures exceed 50C. Check for alternative infill materials.","safer_alternatives":["Natural grass fields","Cork-infill or coconut fiber-infill synthetic turf","TPE (thermoplastic elastomer) infill instead of crumb rubber"],"alternatives":[{"name":"Natural grass fields","notes":"Safer alternative to conventional products"},{"name":"Cork-infill or coconut fiber-infill synthetic turf","notes":"Safer alternative to conventional products"},{"name":"TPE","notes":"thermoplastic elastomer) infill instead of crumb rubber"}],"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":false,"disposal_guidance":"End-of-life turf is construction waste. Crumb rubber cannot be re-recycled.","hazardous_waste":false,"expected_lifespan":"8-12_years"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000029","name":"Benzo[a]pyrene","role":"tire_component","concentration_pct":"trace"},{"hq_id":"hq-c-ino-000001","name":"Lead (Pb)","role":"tire_contaminant","concentration_pct":"trace"},{"hq_id":"hq-c-org-000096","name":"Naphthalene","role":"tire_component","concentration_pct":"trace"},{"hq_id":"hq-c-org-000010","name":"Benzene","role":"off_gas_compound","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000029","compound_name":null,"role":"tire_component","typical_concentration":"1-100 ppm"},{"hq_id":"hq-c-ino-000001","compound_name":null,"role":"tire_contaminant","typical_concentration":"trace-200 ppm"},{"hq_id":"hq-c-org-000096","compound_name":null,"role":"tire_component","typical_concentration":"5-50 ppm"},{"hq_id":"hq-c-org-000010","compound_name":null,"role":"off_gas_compound","typical_concentration":"trace"}],"identifiers":{"common_names":["artificial grass (synthetic turf with crumb rubber infill)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"FieldTurf","manufacturer":"Tarkett","market_position":"professional","notable":"Leading synthetic turf installer"},{"brand":"SYNLawn","manufacturer":"SYNLawn","market_position":"premium","notable":"Residential artificial grass"},{"brand":"ForeverLawn","manufacturer":"ForeverLawn","market_position":"premium","notable":"Premium synthetic lawn brand"}],"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 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":"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_82_naphthalene","type":"regulatory","title":"IARC Monographs Volume 82: Some Traditional Herbal Medicines, Some Mycotoxins, Naphthalene and Styrene — Naphthalene Group 2B Evaluation","year":2002,"inherited_from_compound":"hq-c-org-000096"},{"id":"epa_iris_naphthalene","type":"regulatory","title":"US EPA: Naphthalene — IRIS Toxicological Review, Carcinogenicity Assessment and Reference Concentrations (Group C)","year":1998,"inherited_from_compound":"hq-c-org-000096"},{"id":"iarc_100f","type":"regulatory","title":"IARC Monographs Volume 100F: Benzene","year":2012,"inherited_from_compound":"hq-c-org-000010"},{"id":"epa_benzene_iris","type":"regulatory","title":"US EPA IRIS Assessment: Benzene","year":1998,"inherited_from_compound":"hq-c-org-000010"},{"type":"regulatory","title":"US Environmental Protection Agency (EPA)","jurisdiction":"USA","id":"src_defdd418","extraction":"description_reference"},{"type":"report","title":"US Centers for Disease Control and Prevention (CDC)","jurisdiction":"USA","id":"src_08f06b18","extraction":"description_reference"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-07-31T00:54:20.673Z"},"_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"}