1001 Smart Cities
🇨🇱 Santiago

Critical Episode Management: A Next-Day Forecast With Legal Force

🤖 AI-generated summary · ◆ 9 sourced claims · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

9 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

Restrictions follow a forecast of tomorrow, not a reading of today, and an appointed regional delegate signs them. The industrial lever has emptied: for 2026, one plant of 55 had to stop.

Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run bySeremi del Medio Ambiente Region Metropolitana (station monitoring, next-day forecast, recommendation); declarations issued by the Delegacion Presidencial Regional Metropolitana; enforcement split between the Superintendencia del Medio Ambiente (large industrial establishments), the Seremi de Salud RM (heaters and health inspections), transport authorities and Carabineros (vehicle restriction) and CONAF (agricultural burning)
Scale🗺️ Regional

Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 9 more in Santiago · 🌫️ Air quality guide · 🌱 Environment projects

Every winter from 1 May to 31 August, Santiago manages its air by forecast rather than by reading. The Seremi del Medio Ambiente for the Region Metropolitana watches ten automatic MACAM stations and runs the Cassmassi model — a multiple linear regression proposed in 1999 — to predict the next day's maximum 24-hour particulate average. If the prediction crosses a threshold fixed in the decontamination plan, the Delegacion Presidencial Regional declares an Alerta, Preemergencia or Emergencia for the following day, and legal duties follow: wood-burning heaters barred across the whole region, pellet heaters too from Preemergencia upward, additional number plates taken off the road, listed industrial plants halted, school sport moved indoors. So the threshold binds but the day is judged — the declaration is an act of an appointed regional authority on the environment secretariat's recommendation, not an automatic consequence of a measured value. Chile's environment ministry dates the regime to the first plan in 1997; the current instrument, Supreme Decree 31/2016, has been in force since 2018, and Fundacion Terram points out it was meant to be revised in 2022. The industrial lever has quietly emptied itself: for the 2026 season the environmental regulator listed one of 55 affected large establishments as obliged to stop.

Live 📅 since 1997

📊 Impact

The environment ministry counts 314 hours in fine-particulate episodes in the Region Metropolitana in 2025 against 915 in 2015, a 66% fall over the decade, and 23 declared episodes in 2025 — 20 alerts and 3 pre-emergencies — the third-best winter since the plan began operating (MMA balance, 2025). The same balance reports vehicle-restriction violations down 23% on 2024, wood-heater violations down 88%, illegal agricultural burns down 23.8% in number and 77.6% in area burnt, and 98% of large industrial facilities meeting their particulate reduction goals; every one of these is ministry self-reporting. Meteorology still dominates the annual count: by 16 June 2026 the region had recorded 16 episodes (13 alerts, 3 pre-emergencies) against one at the same date in 2025 and none in 2024, in a season running a 79.2% rainfall deficit (Fundacion Terram, 16 June 2026). No peer-reviewed study isolates the episode regime itself. Jorquera (Urban Climate, 2021) finds a meteorologically adjusted downward PM2.5 trend across Chilean cities that have management plans, but that is the plan as a whole, not its episode days. Barraza et al. (Atmospheric Chemistry and Physics, 2017) found wood burning at 12.3% of downtown PM2.5 and, unlike four other sources, showing no significant change between 1998 and 2012.

🎓 Lesson

A threshold can be fixed in law and still leave the decision human: Santiago acts on a prediction of tomorrow, signed by a presidentially appointed regional authority. And the lever that looks hardest is the emptiest — meeting the plan's emission targets releases a plant from the shutdown list, so by 2026 only one of 55 remained on it.

🌱 EnvironmentAir qualitySensors & IoTHealth & care

Sources

↗ MMA — Autoridades lanzan Gestion de Episodios Criticos (GEC) 2026 para la Region MetropolitanaPublished 30 April 2026Fetched 2026-07-26. Ministry launch of the 2026 season: the GEC runs 1 May to 31 August; permanent wood-heater ban in the Provincia de Santiago plus San Bernardo and Puente Alto; region-wide heater ban from Alerta; pellet ban, extra plate restriction and industrial halts from Preemergencia; indoor-only school activity at Emergencia.
↗ Aire Region Metropolitana (MMA) — Nuevas Medidas del PPDAFetched 2026-07-26. Official measure table by level (Bueno, Regular, Alerta, Preemergencia, Emergencia). Confirms the halt of grandes establecimientos applies only at Preemergencia and Emergencia and that the list is held by the Superintendencia del Medio Ambiente. Does not name the declaring authority.
↗ Aire Region Metropolitana (MMA) — Calidad del AireFetched 2026-07-26. Source for the network size and the thresholds: RED MACAM with 10 monitoring stations, and ICAP bands of 200 / 300 / 500 corresponding to 24-hour PM2.5 of 80 / 110 / 170 micrograms per cubic metre for Alerta, Preemergencia and Emergencia.
↗ T13 — Declaran la tercera Preemergencia Ambiental del ano en la RM (13 June 2026)Fetched 2026-07-26. The load-bearing source for who declares: the Delegacion Presidencial Metropolitana declared the episode for Saturday 14 June 2026 on the recommendation of the Seremi de Medio Ambiente, citing the forecast anticyclonic regime. Also gives the plate digits restricted inside and outside the Americo Vespucio ring.
↗ SMA — GEC 2026: publica listado de paralizacion de grandes establecimientos (Res. Ex. 1258/2026)Published 30 April 2026Fetched 2026-07-26. The opening 2026 shutdown list: five named establishments obliged to halt during Preemergencia or Emergencia from 1 May 2026, and the sanction range of 1 to 10,000 UTA for non-compliance.
Show 8 more sourcesShow fewer
↗ SMA — GEC 2026: actualiza listado de paralizacion de grandes establecimientos (Res. Ex. 1365/2026)Published 20 May 2026Fetched 2026-07-26. The updated list of 20 May 2026: only one of the 55 affected large establishments must suspend operations, the remaining 54 having demonstrated compliance with their emission reduction targets; the single remaining plant is listed for failing to report activity levels and particulate sampling.
↗ MMA — Mejora la calidad del aire en la RM: en una decada disminuye 66% la exposicionPublished 29 August 2025Fetched 2026-07-26. Ministry self-reported balance and the origin of every figure in the impact paragraph's first half: 314 hours in 2025 against 915 in 2015, 23 episodes (20 alerts, 3 pre-emergencies), first PPDA dated to 1997, and the enforcement deltas for vehicle restriction, heaters, agricultural burning and industrial compliance.
↗ Fundacion Terram — Region Metropolitana supera los episodios ambientales criticos de ultimos dos anos (16 June 2026)Fetched 2026-07-26. The independent counterweight: 16 episodes by mid-June 2026 against one in 2025 and none in 2024, a 79.2% rainfall deficit, and criticism from former environment minister Marcelo Mena that the plan has not been updated since 2018 despite a revision designed for 2022, plus Zoe Fleming's view that current restrictions are insufficient.
↗ Barraza, Lambert, Jorquera, Villalobos & Gallardo — Temporal evolution of main ambient PM2.5 sources in Santiago, Chile, from 1998 to 2012, Atmos. Chem. Phys. 17, 10093-10107 (2017)Published 29 August 2017Fetched 2026-07-26, abstract read in full. Peer-reviewed source apportionment of 1,243 filter samples: wood burning 12.3 +/- 1.0% of PM2.5 and the only major source that did not significantly change, while motor vehicles, industry, copper smelters and coastal sources all fell significantly. Note the period ends in 2012, six years before the permanent heater ban, so it does not evaluate today's prohibition.
↗ Alvarado, Silva & Caceres — Modelacion de episodios criticos de contaminacion por material particulado (PM10) en Santiago de Chile, Gac Sanit 2010;24(6):480-487Published December 2010Fetched 2026-07-26. Peer-reviewed description of the official forecasting method: the Cassmassi model proposed in 1999, a multiple linear regression forecasting the next day's maximum 24-hour mean concentration, and the PM10 bands then used to classify the day as bueno, alerta, preemergencia or emergencia.
↗ Jorquera — Air quality management in Chile: Effectiveness of PM2.5 regulations, Urban Climate 35, 100764 (2021)Published January 2021Fetched 2026-07-26 via the university's publication record, since the article itself is paywalled at the publisher. Peer-reviewed, meteorologically adjusted trends across 33 stations in 23 cities: a significant downward PM2.5 trend in cities with a management plan, Santiago among them. Cited as plan-level evidence only; it does not isolate the episode regime.
↗ SINCA (MMA) — Region Metropolitana de SantiagoFetched 2026-07-26. National air quality information system page for the region: the MACAM network has had systematic measurements since 1987 (Santiago Centro, Las Condes, Independencia) and was expanded in 1997 (La Florida, El Bosque, Pudahuel, Cerrillos). Also notes that additional networks installed under project environmental permits are not carried in SINCA.
↗ MMA / Aire RM — Plan Operacional de Gestion de Episodios Criticos (GEC) 2026FETCH FAILED — the 2.8 MB PDF returned as undecodable binary and local PDF rendering was unavailable, so nothing in this entry rests on it. Listed because it is the primary operational document for the season and the editor may want to extract the declaration procedure and station list from it directly.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 1997. 9 of 13 sources carry a publication date, from December 2010 to 16 June 2026.

When the sources were published

  1. SciELO España (Instituto de Salud Carlos III) · researchAlvarado, Silva & Caceres — Modelacion de episodios criticos de contaminacion por material particulado (PM10) en Santiago de Chile, Gac Sanit 2010;24(6):480-487
  2. Copernicus Publications · researchBarraza, Lambert, Jorquera, Villalobos & Gallardo — Temporal evolution of main ambient PM2.5 sources in Santiago, Chile, from 1998 to 2012, Atmos. Chem. Phys. 17, 10093-10107 (2017)
  3. Pontificia Universidad Católica de Chile — Escuela de Ingeniería · researchJorquera — Air quality management in Chile: Effectiveness of PM2.5 regulations, Urban Climate 35, 100764 (2021)
  4. Ministerio del Medio Ambiente (Chile) · national governmentMMA — Mejora la calidad del aire en la RM: en una decada disminuye 66% la exposicion
  5. Ministerio del Medio Ambiente (Chile) · national governmentMMA — Autoridades lanzan Gestion de Episodios Criticos (GEC) 2026 para la Region Metropolitana
  6. Superintendencia del Medio Ambiente (SMA), Chile · oversight bodySMA — GEC 2026: publica listado de paralizacion de grandes establecimientos (Res. Ex. 1258/2026)
  7. Superintendencia del Medio Ambiente (SMA), Chile · oversight bodySMA — GEC 2026: actualiza listado de paralizacion de grandes establecimientos (Res. Ex. 1365/2026)
  8. T13 (Canal 13) · pressT13 — Declaran la tercera Preemergencia Ambiental del ano en la RM (13 June 2026)
Show 1 more dated sourcesShow fewer
  1. Fundación Terram · ngoFundacion Terram — Region Metropolitana supera los episodios ambientales criticos de ultimos dos anos (16 June 2026)

Every source, with links ↑

What happened to this record

  1. Sources last read
  2. Entered the record

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 9 claims with their sources · the forensic record

Evidence Passport · public beta 9 addressable claims, 13 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 9

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.

Claim 1 clm-be48f3ac2b864247 descriptive
The Seremi del Medio Ambiente for the Region Metropolitana watches ten automatic MACAM stations
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The environment ministry's regional air portal states that the map carries the ten MACAM monitoring stations, updated live during the episode-management season.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Aire Region Metropolitana (MMA) — Calidad del Aire
Claim 2 clm-c48b5c4d12b4f335 quantitative
runs the Cassmassi model — a multiple linear regression proposed in 1999 — to predict the next day's maximum 24-hour particulate average
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The peer-reviewed paper names the model, its author, the year it was proposed, its multiple-linear-regression form and that it forecasts the next day's maximum 24-hour PM10 average.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Alvarado, Silva & Caceres — Modelacion de episodios criticos de contaminacion por material particulado (PM10) en Santiago de Chile, Gac Sanit 2010;24(6):480-487
Claim 3 clm-93376672a8eb34d0 quantitative
Every winter from 1 May to 31 August, Santiago manages its air by forecast rather than by reading
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The ministry's launch notice gives the season's end date and describes the annual episode-management period set by the decontamination plan.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. MMA — Autoridades lanzan Gestion de Episodios Criticos (GEC) 2026 para la Region Metropolitana
Claim 4 clm-8a68dc25174a1735 quantitative
for the 2026 season the environmental regulator listed one of 55 affected large establishments as obliged to stop
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The regulator's updated resolution states that one of the 55 affected large establishments must halt its stationary sources in a critical episode.
Caveat
The regulator's earlier list for the same season (Res. Ex. 1258/2026) named five of 55; the entry uses the updated list.

Sources carrying this claim

  1. SMA — GEC 2026: actualiza listado de paralizacion de grandes establecimientos (Res. Ex. 1365/2026)
Claim 5 clm-c2ac3d0d4371c710 quantitative
a 66% fall over the decade
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The ministry's balance states the ten-year fall in hours of exposure to high pollution.
Caveat
Ministry self-reporting; no independent recomputation of the hour counts exists.

Sources carrying this claim

  1. MMA — Mejora la calidad del aire en la RM: en una decada disminuye 66% la exposicion
Claim 6 clm-4801932431603b24 quantitative
the third-best winter since the plan began operating (MMA balance, 2025)
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same balance ranks 2025 as the third year with the fewest hours in critical episodes since the first plan started operating.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. MMA — Mejora la calidad del aire en la RM: en una decada disminuye 66% la exposicion
Claim 7 clm-3776a774f71d0e9d quantitative
by 16 June 2026 the region had recorded 16 episodes (13 alerts, 3 pre-emergencies) against one at the same date in 2025 and none in 2024, in a season running a 79.2% rainfall deficit (Fundacion Terram, 16 June 2026)
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The NGO's 16 June 2026 piece gives the season's episode count, the comparison with the two previous years and the 79.2% rainfall deficit.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Fundacion Terram — Region Metropolitana supera los episodios ambientales criticos de ultimos dos anos (16 June 2026)
Claim 8 clm-75d4c84a117b884f quantitative
Barraza et al. (Atmospheric Chemistry and Physics, 2017) found wood burning at 12.3% of downtown PM2.5
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The peer-reviewed source-apportionment study resolves the downtown PM2.5 sources over 1998-2012, wood burning among them, using two receptor models on 1,243 filter samples.
Caveat
The abstract as fetched gives the method and the source set; the 12.3% share sits in the paper's results table.

Sources carrying this claim

  1. Barraza, Lambert, Jorquera, Villalobos & Gallardo — Temporal evolution of main ambient PM2.5 sources in Santiago, Chile, from 1998 to 2012, Atmos. Chem. Phys. 17, 10093-10107 (2017)
Claim 9 clm-3b2bd3faea2b577b quantitative
meeting the plan's emission targets releases a plant from the shutdown list, so by 2026 only one of 55 remained on it
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The regulator's list is the count: one of 55 affected establishments remains obliged to stop, the rest having met the plan's requirements.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. SMA — GEC 2026: actualiza listado de paralizacion de grandes establecimientos (Res. Ex. 1365/2026)
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

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-evidence-baseline effective 2026-07-26 · created 2026-08-20

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:a9bcf350d3042581aa995762b79c08acfa1944a51a36195fb12d843804433ea1
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
9
of 9 claims mapped
13
source dossiers
7
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Seremi del Medio Ambiente Region Metropolitana (station monitoring, next-day forecast, recommendation); declarations issued by the Delegacion Presidencial Regional Metropolitana; enforcement split between the Superintendencia del Medio Ambiente (large industrial establishments), the Seremi de Salud RM (heaters and health inspections), transport authorities and Carabineros (vehicle restriction) and CONAF (agricultural burning)
Actor types
national-government, regional-government
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

13 source dossiers

MMA — Autoridades lanzan Gestion de Episodios Criticos (GEC) 2026 para la Region Metropolitana mma.gob.cl · 1 linked claim

Open original source ↗

Stable source ID
src-4a961397ed94dc15
Publisher
Name not classified · mma.gob.cl
Type / language
web-page · language not classified
Published
2026-04-30
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. Ministry launch of the 2026 season: the GEC runs 1 May to 31 August; permanent wood-heater ban in the Provincia de Santiago plus San Bernardo and Puente Alto; region-wide heater ban from Alerta; pellet ban, extra plate restriction and industrial halts from Preemergencia; indoor-only school activity at Emergencia.

Descriptive only — not page/paragraph exact
Claims linked
Aire Region Metropolitana (MMA) — Nuevas Medidas del PPDA airerm.mma.gob.cl · background

Open original source ↗

Stable source ID
src-9727c8740f565cff
Publisher
Name not classified · airerm.mma.gob.cl
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. Official measure table by level (Bueno, Regular, Alerta, Preemergencia, Emergencia). Confirms the halt of grandes establecimientos applies only at Preemergencia and Emergencia and that the list is held by the Superintendencia del Medio Ambiente. Does not name the declaring authority.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Aire Region Metropolitana (MMA) — Calidad del Aire airerm.mma.gob.cl · 1 linked claim

Open original source ↗

Stable source ID
src-1c172766522c6104
Publisher
Name not classified · airerm.mma.gob.cl
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. Source for the network size and the thresholds: RED MACAM with 10 monitoring stations, and ICAP bands of 200 / 300 / 500 corresponding to 24-hour PM2.5 of 80 / 110 / 170 micrograms per cubic metre for Alerta, Preemergencia and Emergencia.

Descriptive only — not page/paragraph exact
Claims linked
T13 — Declaran la tercera Preemergencia Ambiental del ano en la RM (13 June 2026) t13.cl · background

Open original source ↗

Stable source ID
src-83a6963af3efa538
Publisher
Name not classified · t13.cl
Type / language
web-page · language not classified
Published
2026-06-13
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. The load-bearing source for who declares: the Delegacion Presidencial Metropolitana declared the episode for Saturday 14 June 2026 on the recommendation of the Seremi de Medio Ambiente, citing the forecast anticyclonic regime. Also gives the plate digits restricted inside and outside the Americo Vespucio ring.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
SMA — GEC 2026: publica listado de paralizacion de grandes establecimientos (Res. Ex. 1258/2026) portal.sma.gob.cl · background

Open original source ↗

Stable source ID
src-0e9b6b49c70d06e0
Publisher
Name not classified · portal.sma.gob.cl
Type / language
web-page · language not classified
Published
2026-04-30
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. The opening 2026 shutdown list: five named establishments obliged to halt during Preemergencia or Emergencia from 1 May 2026, and the sanction range of 1 to 10,000 UTA for non-compliance.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
SMA — GEC 2026: actualiza listado de paralizacion de grandes establecimientos (Res. Ex. 1365/2026) portal.sma.gob.cl · 2 linked claims

Open original source ↗

Stable source ID
src-bfe942212a6c9692
Publisher
Name not classified · portal.sma.gob.cl
Type / language
web-page · language not classified
Published
2026-05-20
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. The updated list of 20 May 2026: only one of the 55 affected large establishments must suspend operations, the remaining 54 having demonstrated compliance with their emission reduction targets; the single remaining plant is listed for failing to report activity levels and particulate sampling.

Descriptive only — not page/paragraph exact
Claims linked
MMA — Mejora la calidad del aire en la RM: en una decada disminuye 66% la exposicion mma.gob.cl · 2 linked claims

Open original source ↗

Stable source ID
src-9240d6c73a64ff05
Publisher
Name not classified · mma.gob.cl
Type / language
web-page · language not classified
Published
2025-08-29
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. Ministry self-reported balance and the origin of every figure in the impact paragraph's first half: 314 hours in 2025 against 915 in 2015, 23 episodes (20 alerts, 3 pre-emergencies), first PPDA dated to 1997, and the enforcement deltas for vehicle restriction, heaters, agricultural burning and industrial compliance.

Descriptive only — not page/paragraph exact
Claims linked
Fundacion Terram — Region Metropolitana supera los episodios ambientales criticos de ultimos dos anos (16 June 2026) terram.cl · 1 linked claim

Open original source ↗

Stable source ID
src-9ebe6bf6c28f85ed
Publisher
Name not classified · terram.cl
Type / language
web-page · language not classified
Published
2026-06-16
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. The independent counterweight: 16 episodes by mid-June 2026 against one in 2025 and none in 2024, a 79.2% rainfall deficit, and criticism from former environment minister Marcelo Mena that the plan has not been updated since 2018 despite a revision designed for 2022, plus Zoe Fleming's view that current restrictions are insufficient.

Descriptive only — not page/paragraph exact
Claims linked
Barraza, Lambert, Jorquera, Villalobos & Gallardo — Temporal evolution of main ambient PM2.5 sources in Santiago, Chile, from 1998 to 2012, Atmos. Chem. Phys. 17, 10093-10107 (2017) acp.copernicus.org · 1 linked claim

Open original source ↗

Stable source ID
src-b17e0384807db1cb
Publisher
Name not classified · acp.copernicus.org
Type / language
web-page · language not classified
Published
2017-08-29
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26, abstract read in full. Peer-reviewed source apportionment of 1,243 filter samples: wood burning 12.3 +/- 1.0% of PM2.5 and the only major source that did not significantly change, while motor vehicles, industry, copper smelters and coastal sources all fell significantly. Note the period ends in 2012, six years before the permanent heater ban, so it does not evaluate today's prohibition.

Descriptive only — not page/paragraph exact
Claims linked
Alvarado, Silva & Caceres — Modelacion de episodios criticos de contaminacion por material particulado (PM10) en Santiago de Chile, Gac Sanit 2010;24(6):480-487 scielo.isciii.es · 1 linked claim

Open original source ↗

Stable source ID
src-7cfe7cce9926eb86
Publisher
Name not classified · scielo.isciii.es
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-07-26. Peer-reviewed description of the official forecasting method: the Cassmassi model proposed in 1999, a multiple linear regression forecasting the next day's maximum 24-hour mean concentration, and the PM10 bands then used to classify the day as bueno, alerta, preemergencia or emergencia.

Descriptive only — not page/paragraph exact
Claims linked
Jorquera — Air quality management in Chile: Effectiveness of PM2.5 regulations, Urban Climate 35, 100764 (2021) ing.uc.cl · background

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Stable source ID
src-886d54d0f807f94d
Publisher
Name not classified · ing.uc.cl
Type / language
web-page · language not classified
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No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
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No local capture recorded
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No archived copy linked
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Fetched 2026-07-26 via the university's publication record, since the article itself is paywalled at the publisher. Peer-reviewed, meteorologically adjusted trends across 33 stations in 23 cities: a significant downward PM2.5 trend in cities with a management plan, Santiago among them. Cited as plan-level evidence only; it does not isolate the episode regime.

Descriptive only — not page/paragraph exact
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Background source; no baseline claim points here
SINCA (MMA) — Region Metropolitana de Santiago sinca.mma.gob.cl · background

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Stable source ID
src-2a1c4524645e4b24
Publisher
Name not classified · sinca.mma.gob.cl
Type / language
web-page · language not classified
Published
Not recorded
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Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
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No archived copy linked
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Fetched 2026-07-26. National air quality information system page for the region: the MACAM network has had systematic measurements since 1987 (Santiago Centro, Las Condes, Independencia) and was expanded in 1997 (La Florida, El Bosque, Pudahuel, Cerrillos). Also notes that additional networks installed under project environmental permits are not carried in SINCA.

Descriptive only — not page/paragraph exact
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Background source; no baseline claim points here
MMA / Aire RM — Plan Operacional de Gestion de Episodios Criticos (GEC) 2026 airerm.mma.gob.cl · background

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Stable source ID
src-5f18ed3e302bb108
Publisher
Name not classified · airerm.mma.gob.cl
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-20
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

FETCH FAILED — the 2.8 MB PDF returned as undecodable binary and local PDF rendering was unavailable, so nothing in this entry rests on it. Listed because it is the primary operational document for the season and the editor may want to extract the declaration procedure and station list from it directly.

Descriptive only — not page/paragraph exact
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.

Continue exploring

Compare this project

🇨🇱 Restriccion Vehicular: Santiago's Vintage-Tiered Plate Rationing · Santiago The lever the forecast pulls: each step up to Alerta or Preemergencia takes further plate digits off the road for the next day. 🇲🇽 SIMAT Air Monitoring and the Valley of Mexico Contingency Programme · Mexico City Mexico City's 155 ppb reading binds by itself; Santiago acts on tomorrow's forecast, signed by an appointed regional delegate. 🇨🇴 RMCAB Air Quality Network & IBOCA Alert Phases · Bogotá Same shape: Bogotá's validation panel and Santiago's regional delegate each stand between the number and the restriction it triggers.

Does the air reading have a consequence?

The same ladder that organises the flood systems in this atlas, applied to air. All four cities measure well. What separates them is whether a number is allowed to oblige anyone to do anything.

ProjectSinceStatusOutcomeEvidenceRun byCostWhat follows from the reading
GRAP: Air Quality Readings as a Legal TriggerNew Delhi, 🇮🇳 2017 Live Ongoing Independent National government, City government, Research institution not public The measurement obliges: an index crossing a fixed step brings legal duties into force by itself, from construction bans to school closures.
Critical Episode Management: A Next-Day Forecast With Legal ForceSantiago, 🇨🇱 1997 Live Ongoing Official National government, Regional government not public The threshold binds but the day is judged — an appointed regional authority signs the declaration, and it acts on a forecast of tomorrow rather than a reading of today.
Bangkok PM2.5 Monitoring & Graduated ResponseBangkok, 🇹🇭 2023 Live Ongoing Official City government not public The city can close its own schools on a reading, must borrow the disaster act to keep trucks out, and can only ask employers.
Court-Ordered Air Quality MonitoringJakarta, 🇮🇩 2021 Live Ongoing Independent City government not public A court ordered the network and the network was built — but no index value triggers anything at all.

Explore the wider context

📟 A Reading Is Not a Decision📖 Air quality index (AQI)📖 Low-emission zone📖 Urban sensor network
📎 Cite this project

1001 Smart Cities (2026). “Critical Episode Management: A Next-Day Forecast With Legal Force” — Santiago, Chile. The Smart City Atlas. https://1001smartcities.org/projects/santiago-air-quality-episodes/ (last verified 2026-07-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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