{
  "schema_version": "1.1.0",
  "@context": "https://schema.org",
  "@type": "DataCatalog",
  "@id": "https://heavymetalindex.com/data#catalog",
  "name": "Heavy Metal Index — open data catalog",
  "url": "https://heavymetalindex.com/data",
  "description": "Machine-readable open data from the Heavy Metal Index: measured heavy-metal occurrence distributions and the cross-jurisdiction regulatory-limit corpus. Literature-native; contains no HMTc certification thresholds.",
  "generated_at": "2026-09-14T11:17:37.985Z",
  "generated_commit": null,
  "license": {
    "prose": "CC BY 4.0",
    "structured_data": "EU sui generis database rights reserved (Directive 96/9/EC). Free to read and cite single records; systematic/bulk extraction or commercial re-utilisation requires a licence — see https://heavymetalindex.com/licensing",
    "contact": "karen@paleofoundation.com"
  },
  "attribution": "Heavy Metal Index (heavymetalindex.com), operated by the Institute of Contaminant Standards. Cite the page_url or wiki_doi carrying each value.",
  "publisher": "Institute of Contaminant Standards",
  "datasets": [
    {
      "id": "hmi-occurrence",
      "name": "Heavy Metal Index — food & ingredient occurrence data",
      "description": "Measured heavy-metal occurrence distributions per ingredient and analyte (typical range, 95th percentile, study count, confidence, contributing sources), compiled from the peer-reviewed and regulatory literature. Values are in ppb (µg/kg) on the basis each source reported.",
      "landing_page": "https://heavymetalindex.com/data",
      "version": "2026-09-14",
      "date_modified": "2026-09-14",
      "record_count": 230,
      "unit": "ppb (µg/kg)",
      "analyte_panel": [
        "Pb",
        "Cd",
        "iAs",
        "tAs",
        "tHg",
        "Ni",
        "Al",
        "Cr",
        "Sn",
        "U"
      ],
      "distributions": [
        {
          "format": "application/json",
          "content_url": "https://heavymetalindex.com/static/data/occurrence.json",
          "content_size": 1598157
        },
        {
          "format": "text/csv",
          "content_url": "https://heavymetalindex.com/static/data/occurrence.csv",
          "content_size": 733617
        }
      ]
    },
    {
      "id": "hmi-regulations",
      "name": "Heavy Metal Index — regulatory limit corpus",
      "description": "Published maximum-level / regulatory-limit records for heavy metals in food and consumer-product matrices across jurisdictions, with agency, program, matrix, effective and sunset dates, and the source page carrying each rule.",
      "landing_page": "https://heavymetalindex.com/data",
      "version": "2026-09-14",
      "date_modified": "2026-09-14",
      "record_count": 179,
      "distributions": [
        {
          "format": "application/json",
          "content_url": "https://heavymetalindex.com/static/data/regulations.json",
          "content_size": 216988
        },
        {
          "format": "text/csv",
          "content_url": "https://heavymetalindex.com/static/data/regulations.csv",
          "content_size": 64004
        }
      ]
    },
    {
      "id": "hmi-sources",
      "name": "Heavy Metal Index — source corpus DOI locator",
      "description": "A DOI → source-page map for the Heavy Metal Index corpus: every peer-reviewed and regulatory document with a resolvable DOI that has a live source page, keyed by bare lowercased DOI, with the page slug, public evidence tier, and year. Lets any client resolve a DOI to its record on heavymetalindex.com/sources/{slug}. Document titles are carried in the companion sources.csv.",
      "landing_page": "https://heavymetalindex.com/data",
      "version": "2026-09-14",
      "date_modified": "2026-09-14",
      "record_count": 2636,
      "distributions": [
        {
          "format": "application/json",
          "content_url": "https://heavymetalindex.com/static/data/sources.json",
          "content_size": 383926
        },
        {
          "format": "text/csv",
          "content_url": "https://heavymetalindex.com/static/data/sources.csv",
          "content_size": 687909
        }
      ]
    }
  ]
}