{"hq_id":"hq-p-out-000056","name":"Lawn Fertilizer (Nitrogen Runoff, Algal Bloom, Phosphorus Restrictions)","category":{"primary":"outdoor","secondary":"gardening","tags":["fertilizer","nitrogen","phosphorus","runoff","algal bloom","eutrophication","dead zone"]},"product_tier":"OUT","overall_risk_level":"moderate","description":"Synthetic lawn fertilizers containing nitrogen (N), phosphorus (P), and potassium (K). Excess nitrogen and phosphorus runoff into waterways causes eutrophication — algal blooms that create hypoxic 'dead zones.' Gulf of Mexico dead zone: 6,000-8,000 sq mi annually, primarily from agricultural fertilizer but residential contributes. 11+ states have restricted or banned phosphorus in lawn fertilizer. Slow-release nitrogen reduces runoff 50-70% vs quick-release.","synthesis":{"derived_risk_level":"insufficient_data","synthesis_confidence":0,"synthesis_method":"none","context_source":null,"compounds_resolved":1,"compounds_total":1,"synthesis_date":"2026-03-27","synthesis_version":"1.0.0"},"hazard_summary":{"sensitive_populations":"aquatic ecosystems, children on treated lawns, drinking water","overall_risk":"moderate","primary_concerns":["Nitrogen and phosphorus runoff causing eutrophication and algal blooms","Gulf of Mexico dead zone 6,000-8,000 sq mi annually (partially residential)","11+ states restricting phosphorus in lawn fertilizer","Children and pet contact with freshly applied fertilizer"],"exposure_routes":"Environmental (runoff to waterways); dermal (lawn contact); oral (child hand-to-mouth)"},"exposure":{"routes":["dermal","oral"],"contact_types":["skin_brief","oral_direct"],"users":["adult","child"],"duration":"minutes","frequency":"monthly","scenarios":["Nitrogen runoff into storm drains and waterways after rain","Children and pets contacting recently fertilized lawn","Algal bloom in local waterways from cumulative residential fertilizer","Over-application: wasting product while increasing environmental damage"],"notes":"EPA: residential fertilizer is a significant non-point source of nutrient pollution. Soil test before fertilizing — most lawns need far less fertilizer than homeowners apply. 11+ states ban or restrict phosphorus in lawn fertilizer (P only needed for new lawns). Slow-release (coated) nitrogen reduces runoff 50-70%. Leave grass clippings on lawn (natural nitrogen recycling). Organic fertilizers (compost, corn gluten) release nutrients slowly with minimal runoff."},"consumer_guidance":{"usage_warning":"Soil test before fertilizing — most lawns need less than you think. Use slow-release nitrogen (50-70% less runoff). Do not fertilize before rain. Keep fertilizer off hard surfaces (sweep back onto lawn). Leave grass clippings on lawn (free nitrogen). Do not apply phosphorus unless soil test shows deficiency.","safer_alternatives":["Soil test first (many lawns need zero additional fertilizer)","Organic fertilizer (compost, corn gluten — slow release, minimal runoff)","Leave grass clippings on lawn (natural nitrogen cycling)","Reduce lawn area (native plants, clover lawn — no fertilizer needed)"],"red_flags":[{"indicator":"Product causing documented ecological damage","meaning":"Consumer choice directly impacts environmental health.","action":"Choose verified lower-impact alternatives."}],"green_flags":[{"indicator":"Third-party environmental certification or verified lower impact","meaning":"Product evaluated for ecological footprint.","verification":"Check for relevant environmental certifications."}],"what_to_ask":[{"question":"What is the environmental impact of this product beyond my personal use?","why_it_matters":"Consumer products aggregate to ecosystem-level effects.","good_answer":"Documented lower-impact formulation with environmental testing.","bad_answer":"No environmental impact assessment."}],"alternatives":[{"name":"Soil test first","notes":"many lawns need zero additional fertilizer"},{"name":"Organic fertilizer","notes":"compost, corn gluten — slow release, minimal runoff"},{"name":"Leave grass clippings on lawn","notes":"natural nitrogen cycling"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA -- multiple states","regulation":"State phosphorus fertilizer restrictions","citation":"Various state laws","requirements":"11+ states ban or restrict phosphorus in lawn fertilizer unless soil test shows deficiency or for new lawn establishment.","compliance_status":null,"effective_date":null,"enforcing_agency":"State departments of agriculture","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":"Use according to label — do not over-apply. Recycle bag.","hazardous_waste":false,"expected_lifespan":"single_use"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-ino-000153","name":"Nitrate","role":"nutrient","concentration_pct":"10-30 N"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-ino-000153","compound_name":null,"role":"nutrient","typical_concentration":"10-30% N"}],"identifiers":{"common_names":["lawn fertilizer (nitrogen runoff, algal bloom, phosphorus restrictions)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Scotts","manufacturer":"ScottsMiracle-Gro","market_position":"mass_market","notable":"Market-leading lawn fertilizer"},{"brand":"Miracle-Gro","manufacturer":"ScottsMiracle-Gro","market_position":"mass_market","notable":"Plant food brand leader"},{"brand":"Espoma","manufacturer":"Espoma","market_position":"premium","notable":"Organic fertilizer brand"}],"sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"State phosphorus fertilizer restrictions (Various state laws)","jurisdiction":"USA -- multiple states","citation":"Various state laws","id":"src_23ddae39"},{"id":"src_001","type":"reference","title":"ATSDR Toxicological Profile — CAS 14797-55-8","url":"https://www.atsdr.cdc.gov/toxprofiledocs/index.html","notes":"Toxicological profile and health effects summary","inherited_from_compound":"hq-c-ino-000153"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-01T14:21:42.266Z"}}