clm-443d1fd1025e612e
quantitative
a 2022 annual PM2.5 average of 36.11 µg/m³ — more than double the WHO guideline of 15 µg/m³
Permanent project revision
Tehran Air Quality Monitoring Network & Pollution Emergency Closures
Revision 2026-08-20-source-dates · effective 2026-08-07
Current revision. This is the snapshot used by the live entity page.
unreviewed
Created the first structured Evidence Passport with 1 claim and 4 source dossiers.
sha256:1910d615b68c6058e2a170b91a424dc6b2742f77b2b791e03893274e419ff7b6
Change set
add/evidencePassport— Added claim-level evidence mapping and source dossiers.add/revisionHistory— Established a permanent, hash-addressed baseline revision.
- 1
- of 1 claims mapped
- 4
- source dossiers
- 3
- publication dates recorded
- 0
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Claims, one by one
The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.
Source dossiers and revision state
This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.
unreviewed
Revision 2026-08-20-source-dates
effective 2026-08-07 · created 2026-08-20
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:1910d615b68c6058e2a170b91a424dc6b2742f77b2b791e03893274e419ff7b6
- 1
- of 1 claims mapped
- 4
- source dossiers
- 3
- publication dates recorded
- 0
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Governance facts carried by the record
- Operator
- Tehran Air Quality Control Company (Tehran Municipality) with Iran's Department of Environment
- Actor types
- city-government
- Funding model
- Not recorded
- Funding description
- Not recorded
- Cost
- Not recorded
- Ownership
- Not recorded
- Decision rights
- Not recorded
- Exit conditions
- Not recorded
4 source dossiers
Scientific Reports (Nature) — 'Spatial and temporal patterns of urban air pollution in Tehran' (2024)
- Stable source ID
src-8ae6d70ebfbe7418- Publisher
- Name not classified · nature.com
- Type / language
- web-page · language not classified
- Published
- 2024-10-24
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-07
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Carries the station count ('In Tehran, 37 AQMSs are operational, with 24 monitored by the Air Quality Control Company (AQCC) and 13 under the supervision of the Department of Environment'), the hourly 2019–2022 dataset and the 36.11 µg/m³ 2022 PM2.5 average vs the 15 µg/m³ WHO guideline. Fetched and quoted.
- Claims linked
aqicn.org — Tehran real-time AQI (World Air Quality Index project)
- Stable source ID
src-7b0ea6b8254a3c08- Publisher
- Name not classified · aqicn.org
- Type / language
- web-page · language not classified
- Published
- Not recorded
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-07
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Station-before-number check: confirms named ground stations (Imam Khomeini, Poonak, Pasdaran, Region 19, Shahid Beheshti University) feeding live data via Iran's national monitoring system aqms.doe.ir — not a satellite model. Fetched.
- Claims linked
- Background source; no baseline claim points here
RFE/RL — 'Tehran Suffocates As Air Pollution Reaches Crisis Levels' (1 Dec 2025)
- Stable source ID
src-1e4fdf85df55cd48- Publisher
- Name not classified · rferl.org
- Type / language
- web-page · language not classified
- Published
- 2025-12-01
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-07
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Carries the November–December 2025 emergency response — schools closed, truck travel banned — and the line that official statistics attribute tens of thousands of deaths across Iran each year to unsafe air. Fetched.
- Claims linked
- Background source; no baseline claim points here
RFE/RL — 'Tehran Pollution Reaches Alarming Level In Latest Environmental Crisis' (29 Nov 2025)
- Stable source ID
src-4837b7ce933e751a- Publisher
- Name not classified · rferl.org
- Type / language
- web-page · language not classified
- Published
- 2025-11-29
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-07
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Carries the closure of educational institutions and universities in the capital as air quality deteriorated. Verified via RFE/RL site-search summary; article body itself is a video piece.
- Claims linked
- Background source; no baseline claim points here
Known limits of this passport
- 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.