{"hq_id":"hq-p-out-000016","name":"Synthetic Lawn Fertilizer and Weed-and-Feed","category":{"primary":"outdoor","secondary":"lawn_care","tags":["herbicide","2,4-D","lawn","pet_safety","aquatic_toxicity"]},"product_tier":"OUT","overall_risk_level":"high","description":"Granular synthetic lawn fertilizer and weed-and-feed products (Scotts, TruGreen, etc.). Contains nitrogen (ammonium nitrate/urea), phosphorus, potassium, plus herbicide (2,4-D, dicamba, MCPP). 2,4-D is IARC 2B and linked to non-Hodgkin lymphoma in epidemiological studies. Children and pets re-enter treated lawns; no federal re-entry interval for residential use. Runoff contributes to algal blooms and aquatic dead zones. Over 80 million pounds of lawn pesticides applied annually in US.","synthesis":{"derived_risk_level":"high","synthesis_confidence":0.538,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users_fallback","exposure_modifier":1,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":1,"compounds_total":1,"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":{"overall_risk":"high","primary_concerns":["2,4-D exposure (IARC 2B, NHL risk)","No residential re-entry interval (children/pets immediate access)","Aquatic runoff → algal blooms → dead zones","Dog cancer association (bladder cancer, NHL) with lawn pesticide exposure","80M+ lbs lawn pesticides/year in US"],"sensitive_populations":"Children (hand-to-mouth on lawns), dogs (grass ingestion, paw licking), pregnant women, aquatic ecosystems","exposure_routes":"Dermal (walking/playing on treated lawn), ingestion (hand-to-mouth, pets eating grass), inhalation (application)"},"exposure":{"routes":["dermal","ingestion","inhalation"],"contact_types":[],"users":["child","pets"],"duration":"","frequency":"seasonal","scenarios":["Dermal contact during handling of Synthetic Lawn Fertilizer and Weed-and-Feed","Inhalation exposure during use of Synthetic Lawn Fertilizer and Weed-and-Feed"],"notes":"Children play on treated lawn; dogs eat grass; no residential re-entry interval"},"consumer_guidance":{"red_flags":["Children/pets on lawn immediately after application","Application before rain (runoff)","Weed-and-feed on windy days (drift)"],"green_flags":["Fertilizer-only (no herbicide)","Organic/natural fertilizer","72-hour re-entry after herbicide application","Targeted spot treatment instead of broadcast"],"what_to_ask":["Does this contain 2,4-D or other herbicides?","What is the recommended re-entry interval?"],"alternatives":["Organic lawn fertilizer (compost, bone meal)","Manual weed removal","Clover lawn (nitrogen-fixing, no fertilizer needed)","Corn gluten meal (natural pre-emergent)"],"notes":null},"regulatory":{"applicable_regulations":["EPA FIFRA registration","State pesticide applicator laws","Clean Water Act (runoff)","Some municipalities ban cosmetic pesticides (Canada)"],"certifications":[],"labeling":{},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":"bag typically not","disposal_guidance":"Hazardous waste collection for unused herbicide products","hazardous_waste":true,"expected_lifespan":"seasonal; use within 2 years"},"formulation":{"form":"granular","key_ingredients":[{"hq_id":null,"name":"Ammonium nitrate / Urea","role":"nitrogen_source","concentration_pct":"20-30"},{"hq_id":"hq-c-org-000130","name":"2,4-D","role":"herbicide","concentration_pct":"1-5","match_status":"repaired-D391","match_date":"2026-07-14","_d391_repair":{"was":"hq-c-org-000449","now":"hq-c-org-000130","basis":"compound_name match (CAS/name-verified)"}},{"hq_id":"hq-c-org-000131","name":"Dicamba","role":"herbicide","concentration_pct":"0.5-2"},{"hq_id":null,"name":"Potassium chloride","role":"potassium_source","concentration_pct":"5-10"}],"certifications":["EPA registered (herbicide products)"]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000130","compound_name":"2,4-D","role":"herbicide","typical_concentration":null}],"identifiers":{"manufacturer":"","common_names":[],"aliases":[],"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":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-23"},{"type":"regulation","title":"EPA FIFRA registration","jurisdiction":"","id":"src_a49741d8"},{"type":"regulation","title":"State pesticide applicator laws","jurisdiction":"","id":"src_330c54b2"},{"type":"regulation","title":"Clean Water Act (runoff)","jurisdiction":"","id":"src_8b24c91d"},{"type":"regulation","title":"Some municipalities ban cosmetic pesticides (Canada)","jurisdiction":"","id":"src_f78d5f0a"},{"type":"monograph","title":"International Agency for Research on Cancer (IARC)","jurisdiction":"International","id":"src_d9ebbaf2","extraction":"description_reference"},{"id":"iarc_113_herbicides","type":"regulatory","title":"IARC Monographs Volume 113: Some Organophosphate Insecticides and Herbicides — 2,4-D Group 2B Classification, NHL Epidemiology, Glyphosate Group 2A, and Agricultural Worker Cohort Studies (2015)","year":2015,"inherited_from_compound":"hq-c-org-000130"},{"id":"epa_2_4_d_registration","type":"regulatory","title":"US EPA: 2,4-D Registration Review (2005/2012) — Group D Carcinogenicity Classification, Dietary Residue Tolerances, Lawn Re-Entry Exposure Assessment, and Aquatic Life Risk Assessment","year":2012,"inherited_from_compound":"hq-c-org-000130"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-07-31T00:56:38.312Z"},"_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"}