{"hq_id":"hq-p-out-000062","name":"Beach and Lake Water Quality (E. coli, Cyanotoxin, Algal Bloom Advisory)","category":{"primary":"outdoor","secondary":"recreation","tags":["beach","lake","E. coli","cyanotoxin","algal bloom","swimming","advisory","HAB"]},"product_tier":"OUT","overall_risk_level":"moderate","description":"Recreational water quality at beaches and lakes: monitored for fecal indicator bacteria (E. coli for fresh water, enterococci for marine) and harmful algal blooms (HABs) producing cyanotoxins (microcystin, cylindrospermopsin, anatoxin-a). EPA recreational water quality criteria: 126 CFU/100mL E. coli (fresh), 35 CFU/100mL enterococci (marine). HABs increasing due to nutrient runoff and warming — cyanotoxin exposure causes liver damage, neurological effects, and skin irritation. Dogs are particularly susceptible to cyanotoxin poisoning from HAB-contaminated water.","synthesis":{"derived_risk_level":"severe","synthesis_confidence":0.873,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.1,"vulnerability_escalated":false,"escalation_reason":null,"compounds_resolved":1,"compounds_total":1,"synthesis_date":"2026-03-27","synthesis_version":"1.0.0"},"hazard_summary":{"sensitive_populations":"children (swallowing water), dogs (cyanotoxin), immunocompromised","overall_risk":"moderate","primary_concerns":["E. coli/enterococci: gastroenteritis from fecal-contaminated recreational water","Cyanotoxin from HABs: liver damage, neurological effects, lethal to dogs","HABs increasing due to nutrient runoff and climate warming","Many inland waters have no monitoring requirement"],"exposure_routes":"Oral (swallowing water); dermal (skin contact); inhalation (aerosol from waves/jet skis)"},"exposure":{"routes":["oral","dermal","inhalation"],"contact_types":["oral_direct","skin_prolonged","inhalation"],"users":["adult","child"],"duration":"hours","frequency":"weekly","scenarios":["Swimming in E. coli contaminated water (gastroenteritis)","HAB/cyanotoxin exposure: liver damage, neurological, skin rash","Children swallowing recreational water during swimming","Dogs drinking HAB-contaminated water (lethal cyanotoxin dose)"],"notes":"EPA BEACH Act (2000): requires monitoring at coastal and Great Lakes beaches. Many inland lakes/rivers have no monitoring requirement. Check BeachGuard.noaa.gov or state health dept for advisories before swimming. HABs: visible green/blue-green scum on water surface — do NOT swim, wade, or let pets drink. Cyanotoxin can kill a dog within hours. EPA health advisory for microcystin: 8 μg/L for children, 4 μg/L for bottle-fed infants."},"consumer_guidance":{"usage_warning":"Check beach advisories before swimming (BeachGuard.noaa.gov, state health dept). Do NOT swim in visibly green/scummy water (HAB). Do NOT let dogs drink or swim in HAB-contaminated water (can be lethal). Shower after recreational swimming. Do not swim with open wounds.","safer_alternatives":["Check advisory databases before recreational water use","Avoid visibly discolored or scummy water (HAB indicator)","Shower within 1 hour of recreational swimming","Chlorinated pools for guaranteed microbial safety"],"red_flags":[{"indicator":"Water quality not tested or treatment system not maintained","meaning":"Unknown contaminant exposure or treatment failure.","action":"Test water. Maintain treatment systems per manufacturer schedule."}],"green_flags":[{"indicator":"NSF-certified treatment system with current maintenance","meaning":"Verified contaminant reduction with functioning system.","verification":"Check NSF certification and maintenance schedule compliance."}],"what_to_ask":[{"question":"What specific contaminants does this system remove, and at what efficiency?","why_it_matters":"No single system removes everything. Match treatment to your specific water quality.","good_answer":"NSF-certified for specific contaminants with published reduction data.","bad_answer":"Generic claims without specific contaminant testing."}],"alternatives":[{"name":"Check advisory databases before recreational water use","notes":"Alternative"},{"name":"Avoid visibly discolored or scummy water","notes":"HAB indicator"},{"name":"Shower within 1 hour of recreational swimming","notes":"Alternative"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"EPA BEACH Act (2000) + Recreational Water Quality Criteria","citation":"33 U.S.C. 1346","requirements":"Monitoring at coastal and Great Lakes beaches. Criteria: 126 CFU/100mL E. coli (fresh), 35 CFU/100mL enterococci (marine).","compliance_status":null,"effective_date":"2000-10-10","enforcing_agency":"EPA / state health depts","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":"N/A — natural water body.","hazardous_waste":false,"expected_lifespan":"varies"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000011","name":"Formaldehyde","role":"trace","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000011","compound_name":null,"role":"trace","typical_concentration":"trace"}],"identifiers":{"common_names":["beach and lake water quality (e. coli, cyanotoxin, algal bloom advisory)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"ScottsMiracle-Gro","manufacturer":"ScottsMiracle-Gro","market_position":"mass_market","notable":"Lawn and garden leader"},{"brand":"Husqvarna","manufacturer":"Husqvarna","market_position":"premium","notable":"Outdoor power and garden equipment"},{"brand":"DeWalt","manufacturer":"Stanley Black & Decker","market_position":"mass_market","notable":"Outdoor power tools"}],"sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"EPA BEACH Act (2000) + Recreational Water Quality Criteria (33 U.S.C. 1346)","jurisdiction":"USA","year":2000,"citation":"33 U.S.C. 1346","id":"src_6b5d7c1c"},{"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":"regulatory","title":"US Environmental Protection Agency (EPA)","jurisdiction":"USA","id":"src_defdd418","extraction":"description_reference"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-01T14:26:44.796Z"}}