{
  "id": "safety/pfas-drinking-water-advice",
  "signature": "AI tells a resident in a PFAS-contaminated area that boiling tap water removes forever chemicals, or that bottled water is always safer",
  "signature_zh": "AI告诉PFAS污染地区的居民，煮沸自来水可以去除永久化学物质，或者瓶装水总是更安全",
  "regex": "boiling water removes PFAS|boil tap water to remove forever chemicals|bottled water is safer than tap for PFAS",
  "domain": "safety",
  "category": "physical_safety",
  "subcategory": null,
  "root_cause": "PFAS (per- and polyfluoroalkyl substances) are heat-stable and do not degrade at boiling point (100°C); boiling actually concentrates PFAS by evaporating water. Bottled water may also contain PFAS from source contamination or plastic leaching; only specific filtration (activated carbon, reverse osmosis, ion exchange) certified to NSF/ANSI 53 or P473 reduces PFAS levels",
  "root_cause_type": "generic",
  "root_cause_zh": "PFAS（全氟和多氟烷基物质）具有热稳定性，在沸点（100°C）下不会降解；煮沸实际上通过蒸发水来浓缩PFAS。瓶装水也可能因水源污染或塑料浸出而含有PFAS；只有经过NSF/ANSI 53或P473认证的特定过滤（活性炭、反渗透、离子交换）才能降低PFAS水平",
  "versions": [
    {
      "version": "EPA PFAS Drinking Water Health Advisories 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "NSF/ANSI 53-2023 Drinking Water Treatment Units",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "NSF/ANSI P473-2023 PFAS Reduction",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Boil tap water for 10 minutes to remove PFAS",
      "why_fails": "PFAS are thermally stable; boiling does not break them down and may increase concentration due to evaporation",
      "fail_rate": 0.95,
      "condition": "",
      "sources": []
    },
    {
      "action": "Switch to bottled water without checking the brand's PFAS testing",
      "why_fails": "Many bottled water brands use municipal tap water or sources with PFAS; plastic bottles can also leach PFAS; only brands with certified testing are safer",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Install a water filter certified to NSF/ANSI 53 for PFAS reduction (e.g., activated carbon block) or NSF/ANSI 58 for reverse osmosis. Check the local water utility's PFAS test results. For immediate action, use a certified pitcher filter like those from Brita or ZeroWater that meet NSF standards.",
      "success_rate": 0.85,
      "how": "Install a water filter certified to NSF/ANSI 53 for PFAS reduction (e.g., activated carbon block) or NSF/ANSI 58 for reverse osmosis. Check the local water utility's PFAS test results. For immediate action, use a certified pitcher filter like those from Brita or ZeroWater that meet NSF standards.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Contact the local water utility for PFAS test results and follow their advisory. If using bottled water, choose brands that publish third-party PFAS testing (e.g., many spring water brands).",
      "success_rate": 0.8,
      "how": "Contact the local water utility for PFAS test results and follow their advisory. If using bottled water, choose brands that publish third-party PFAS testing (e.g., many spring water brands).",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "安装经NSF/ANSI 53认证用于PFAS减少的滤水器（例如活性炭块）或NSF/ANSI 58反渗透系统。查看当地水务公司的PFAS测试结果。对于即时行动，使用符合NSF标准的认证壶式过滤器，如Brita或ZeroWater。",
    "联系当地水务公司获取PFAS测试结果并遵循其建议。如果使用瓶装水，选择发布第三方PFAS测试的品牌（例如许多泉水品牌）。"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.epa.gov/pfas/meaning-and-availability-pfas-drinking-water-testing",
  "official_doc_section": null,
  "error_code": "PFAS-SAFETY-001",
  "verification_tier": "ai_generated",
  "confidence": 0.87,
  "fix_success_rate": 0.8,
  "resolvable": "partial",
  "first_seen": "2025-01-25",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}