{
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 "constitutionVersion": "1.0.0",
 "createdAt": "2026-08-12T00:00:00Z",
 "description": "Append-only Evidence Passport records. Old revisions are immutable; corrections create a new revision and preserve the previous permalink.",
 "entity": {
  "type": "project",
  "id": "accra-air-quality-monitoring",
  "title": "Breathe Accra: One Air Sensor per Municipal Assembly",
  "canonicalUrl": "https://1001smartcities.org/projects/accra-air-quality-monitoring/"
 },
 "currentRevisionId": "2026-08-20-source-dates",
 "revisions": [
  {
   "id": "2026-08-20-source-dates",
   "createdAt": "2026-08-20T19:16:27Z",
   "effectiveAt": "2026-08-01",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 1 claim and 6 source dossiers.",
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    "label": "AI-assisted evidence preparation",
    "humanApproved": false
   },
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    "by": null,
    "date": null,
    "note": "Awaiting operator and domain-expert review; publication of this revision implies neither."
   },
   "changes": [
    {
     "operation": "add",
     "path": "/evidencePassport",
     "summary": "Added claim-level evidence mapping and source dossiers."
    },
    {
     "operation": "add",
     "path": "/revisionHistory",
     "summary": "Established a permanent, hash-addressed baseline revision."
    }
   ],
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   "snapshot": {
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    "assurance": {
     "status": "unreviewed",
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      "schema",
      "publication-diff-contract",
      "material-project-fingerprint",
      "claim-text-drift",
      "source-reference-resolution",
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      "snapshot-hash"
     ]
    },
    "projectState": {
     "status": "live",
     "outcome": "ongoing",
     "evidenceGrade": "peer-reviewed",
     "timeline": {
      "started": 2022,
      "ended": null
     }
    },
    "governance": {
     "operator": "Breathe Accra / GhanaAQ (University of Cape Coast) with Greater Accra municipal assemblies and Ghana EPA",
     "actorTypes": [
      "research",
      "city-government",
      "national-government"
     ],
     "fundingModel": "grant",
     "fundingDescription": "Clean Air Fund; Breathe Cities",
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-bb9cf60f5b32d41f",
      "field": "impact",
      "text": "A peer-reviewed colocation study in Accra put the EPA's low-cost network at a daily average PM2.5 of 23.4 ug/m3 over 2018-2021, 1.6 times the WHO daily guideline of 15, across 11,001 valid days.",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-6e8331f3522a8530"
      ],
      "supportNote": "The entry names this colocation study as the peer-reviewed source that measured the network average against a reference Teledyne T640 instrument.",
      "caveat": "The same study found the Clarity Node-S used here the least accurate of three brands, with a mean absolute error of 13.68 ug/m3 before correction.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
    "sources": [
     {
      "id": "src-44e8f0ee0e95937f",
      "title": "Clarity - Breathe Accra: continuous urban air quality monitoring",
      "url": "https://www.clarity.io/customer-stories/empowering-communities-in-accra-ghana-with-continuous-urban-air-quality-monitoring",
      "publisher": {
       "name": null,
       "domain": "clarity.io",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
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      "temporal": {
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       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-01",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Vendor and operator account: led by Prof. Kofi Amegah's team at the University of Cape Coast under the GhanaAQ project (started 2019), network deployed early 2022, 15 Clarity Node-S sensors, one per municipal assembly, partners include Ghana EPA and Ghana Health Service, funded by the Clean Air Fund.",
       "exact": false
      },
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     {
      "id": "src-c0978da74d4ce317",
      "title": "MyJoyOnline - Municipal assemblies gain real-time pollution data as Breathe Accra expands (30 May 2026)",
      "url": "https://www.myjoyonline.com/municipal-assemblies-gain-real-time-pollution-data-as-breathe-accra-expands-air-quality-monitoring-network/",
      "publisher": {
       "name": null,
       "domain": "myjoyonline.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2026-05-30",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-01",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Phase two: thirteen municipal assemblies each get three more sensors, taking Accra past fifty; funding from Breathe Cities. An assembly officer names the intended lever - open-burning bylaws, prosecuted in court. The article's claim to be the sub-region's largest such network is not independently verified and is not repeated here.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
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      "id": "src-6e8331f3522a8530",
      "title": "Environ. Sci. Technol. (2023) - Low-cost sensor intercomparison, correction factors and 2+ years of PM2.5 monitoring in Accra",
      "url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC10373484/",
      "publisher": {
       "name": null,
       "domain": "pmc.ncbi.nlm.nih.gov",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
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      "role": "claim-evidence",
      "claimRefs": [
       "clm-bb9cf60f5b32d41f"
      ],
      "temporal": {
       "publishedAt": "2023-03-22",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-01",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Peer-reviewed. Ghana EPA deployed 17 Clarity Node-S Gen I across Accra from May 2018; network daily mean PM2.5 23.4 ug/m3 (1.6x the WHO daily guideline) over 11,001 valid days; colocation against a reference Teledyne T640 found Clarity Node-S the least accurate of three brands (MAE 13.68 ug/m3) before correction.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": "https://web.archive.org/web/20250204115700/https://pmc.ncbi.nlm.nih.gov/articles/PMC10373484/",
       "archivedAt": "2025-02-04",
       "contentHash": null,
       "status": "archive-linked"
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     },
     {
      "id": "src-cb1fd0a135cb9ebc",
      "title": "EPA Ghana - Air Quality Portal",
      "url": "https://aqi-gh.org/",
      "publisher": {
       "name": null,
       "domain": "aqi-gh.org",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
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       "recordLastVerifiedAt": "2026-08-01",
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       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The regulator's public real-time portal (Accra station shown: Achimota Interchange), with a six-band AQI scale and Ghana's standards of 35 ug/m3 PM2.5 and 70 ug/m3 PM10. Verified loading 1 Aug 2026. Compliance standards, not automatic triggers.",
       "exact": false
      },
      "preservation": {
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       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-1024a67d2d38d818",
      "title": "Ghana News Agency - Air quality management regulations passed into law (Sept 2025)",
      "url": "https://gna.org.gh/2025/09/air-quality-management-regulations-passed-into-law-epa/",
      "publisher": {
       "name": null,
       "domain": "gna.org.gh",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2025-09-06",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-01",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Environmental Protection (Air Quality Management) Regulations, 2025 (LI 2507): industry must install pollution controls and monitor emissions, and an Air Quality Information Management System is required. No ambient index threshold with an automatic consequence is described.",
       "exact": false
      },
      "preservation": {
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       "status": "not-captured"
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     },
     {
      "id": "src-bec5f21f40e9235d",
      "title": "EPIC / University of Chicago - How air quality data is driving policy action in Ghana",
      "url": "https://climate.uchicago.edu/news/air-quality-fund-impact-how-air-quality-data-is-driving-policy-action-in-ghana/",
      "publisher": {
       "name": null,
       "domain": "climate.uchicago.edu",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2026-04-09",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-01",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Funder account, independent of Breathe Accra. Confirms LI 2507 and the revision of national standards; its own monitoring grant built a hybrid network in Tema, not Accra - kept out of this entry.",
       "exact": false
      },
      "preservation": {
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    ],
    "coverage": {
     "claimsTotal": 1,
     "claimsMapped": 1,
     "sourcesTotal": 6,
     "sourcesUsedByClaims": 1,
     "sourcesWithPublicationDate": 4,
     "sourcesWithArchive": 1,
     "sourcesWithExactLocator": 0,
     "sourcesWithContentHash": 0
    },
    "limits": [
     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
    ]
   }
  }
 ]
}