Permanent project revision

Warsaw's Low-Cost Air Sensor Network and Municipal Smog Alerts

Revision 2026-10-17-baseline · effective 2026-10-17

Current revision. This is the snapshot used by the live entity page.

unreviewed

Created the first structured Evidence Passport with 23 claims and 10 source dossiers.

sha256:01b417562f1eef5ac80b7ffeb2151c52b43c50297ed83715d5b843c340af3497

All revisions → Current entity page →

Change set

add /evidencePassport — Added claim-level evidence mapping and source dossiers.
add /revisionHistory — Established a permanent, hash-addressed baseline revision.

23: of 23 claims mapped
10: source dossiers
6: 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.

Claim 1 clm-a73099011cadd292 descriptive

Warsaw runs its own network of low-cost air sensors next to the state's reference stations

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The city lists its measuring points as the state monitoring stations of GIOŚ plus the devices of its own Warsaw air-quality information network; the supplier describes it as a dense network of low-cost devices supplementing the state stations.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Warszawa 19115 — Warszawski Indeks Powietrza (city knowledge base)
Airly — Warsaw City Council case study (supplier)

Claim 2 clm-e5f4dcf35c536213 quantitative

Switched on in 2022

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The auditor records the system of non-reference sensors as launched in 2022.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 3 clm-995e9b146c71f974 quantitative

108 devices across all 18 districts and 56 more in 17 partner municipalities

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit counts 164 sensors, 108 installed in Warsaw and 56 in 17 partner municipalities, located in all 18 districts.
Caveat: The city's tender in 2021 was for 165 sensors (57 outside Warsaw); the audit's count of 164 is the installed figure.

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 4 clm-aff3b1c95fdc2166 descriptive

supplied and serviced under contract by Airly Public

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The supplier reports the contract signed on 30 December 2021 with Warsaw City Hall for the supply of the complete monitoring system, covered by Airly Public's technical service.
Caveat: This is the supplier's own announcement.

Sources carrying this claim

Airly — Warsaw Set to Have Europe's Largest Air Quality Monitoring Coverage (supplier's announcement of the city contract)

Claim 5 clm-7111e355b3d86b4d quantitative

They measure particulate matter (PM1, PM2.5, PM10) and nitrogen dioxide

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The city states that the sensors measure PM10, PM2.5 and PM1, and that all of them also measure nitrogen dioxide (some also ozone).
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Warszawa 19115 — Warszawski Indeks Powietrza (city knowledge base)

Claim 6 clm-c78257ec8b4fae16 descriptive

but not with the EU directive's reference methods

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit defines the non-reference sensors as devices that did not use the measurement methods set out in EU Directive 2008/50/EC on ambient air quality.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 7 clm-87fdf641074dec7e quantitative

in 2020 the city also built two roadside stations to the state inspectorate's standard

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit says the two city stations built in 2020 were planned and built to the Chief Inspectorate's requirements as traffic stations; the city names them at Grochowska street and Solidarności avenue.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)
Warszawa 19115 — Warszawski Indeks Powietrza (city knowledge base)

Claim 8 clm-4d88c2c6f0738014 quantitative

Since 14 September 2022 all readings appear on the city's IoT map and in the Warszawa 19115 app

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit says results from the city's stations, the state monitoring network and the non-reference sensors were made available in real time on the city's web platform from 14 September 2022 and in the Warszawa 19115 app.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 9 clm-748860cb357c84c7 descriptive

with a four-level Warsaw Air Index and advice for residents

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The city defines the Warsaw Air Index as an approximate pollution indicator on a four-level scale, with recommendations for residents.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Warszawa 19115 — Warszawski Indeks Powietrza (city knowledge base)

Claim 10 clm-a015a36c3bdc1f4e descriptive

a municipal police duty officer works them out from the state's data

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit describes the city procedure: after GIOŚ publishes its 6:00 and 15:00 readings, the duty officer in the municipal police calculates the average PM10 concentration and, if an alert applies, sends the message by 7:00 or 16:00.
Caveat: The procedure is described as it stood at the 2023 audit.

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 11 clm-c66546e35c4b2d61 quantitative

at PM10 levels below the national thresholds

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit says Warsaw developed and launched its own procedure for informing about elevated PM10 at thresholds lower than the national standards (yellow, orange and red alerts).
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 12 clm-c6956d297f39172a quantitative

auditing the city's measures against traffic pollution from 2018 onward

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit P/23/064 covers actions to limit traffic pollution in cities, for the period from 1 January 2018 to the end of the audit.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 13 clm-d3e82c7216f19ebf quantitative

assessed them positively in August 2023

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The overall assessment, signed on 30 August 2023, finds that the city took correct and effective action to limit traffic pollution.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 14 clm-2836ceee56d58fef descriptive

Warsaw identified the problem reliably, measured air quality including breaches of the standards, and made the readings available to residents in real time

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit states that the city reliably identified traffic-pollution problems, measured pollution levels including breaches of the standards, and made them available to residents in real time via the city web platform and the Warszawa 19115 app.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 15 clm-dd147f289db60855 descriptive

When the state inspectorate warned of a breach, the city passed it on through its website, app notices and SMS, also to schools and preschools

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit says that when GIOŚ notified a risk or occurrence of a breach of air-quality standards, residents were informed on the city website, through a notice in the Warszawa 19115 app and by SMS for those who opted in, and schools and preschools were informed the same way.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 16 clm-fac27b6b598f9903 quantitative

The state and city stations recorded 43 to 62 days above the daily PM10 limit in 2018 and none from 2019 to 2022

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit lists, for the measuring stations in the city, between 43 and 62 days with PM10 daily-limit exceedances in 2018 and none recorded in 2019–2022.
Caveat: These are station readings, not sensor readings, and the range spans the different stations.

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 17 clm-480db2e0fe4a3183 descriptive

A dense sensor network can show where the air is bad

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The contract announcement gives the project's aim, beyond informing residents, as designating areas with increased concentrations of pollutants from low-level emissions.
Caveat: The aim is stated in the supplier's announcement.

Sources carrying this claim

Airly — Warsaw Set to Have Europe's Largest Air Quality Monitoring Coverage (supplier's announcement of the city contract)

Claim 18 clm-6af651a1efaf21ed descriptive

Warsaw's own alerts are worked out from the state's reference data and end in a text or app message

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit describes the duty officer calculating PM10 averages from GIOŚ data and, when an alert applies, the message going to educational institutions and residents through the Warszawa 19115 contact centre by SMS and app notification.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 19 clm-5ff099a4c545c544 quantitative

orange above 80 µg/m³ of PM10, where the national information level is 100

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The audit's footnote gives the city's information level (orange alert) at a PM10 concentration above 80 µg/m³ and its alarm level above 100 µg/m³, against national standards of 100 and 150 µg/m³ under the 2019 regulation.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)

Claim 20 clm-3d752e35bf63373d quantitative

a ban on burning coal in Warsaw's stoves and fireplaces since 1 October 2023, written into the regional anti-smog resolution

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The city states that since 1 October 2023 hard coal and coal-based solid fuels may not be used within Warsaw's boundaries, in stoves or fireplaces, a ban introduced by the Masovian regional assembly in its amended anti-smog resolution.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Warszawa 19115 — Zakaz spalania węgla w Warszawie (city knowledge base)

Claim 21 clm-514cd253ee8e272d quantitative

municipal police inspections, which in January 2026 followed 370 reports of air pollution and ended in 25 fines

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The report says the municipal police received 370 notifications about air pollution in January 2026 and, as a result of the interventions, issued 25 fines and closed seven cases with a caution.
Caveat: Press report of one month; the fines include the burning of waste, not only coal.

Sources carrying this claim

elektromobilni.pl — Elektryczny smogowóz tropi trucicieli. 370 zgłoszeń w styczniu (19 Feb 2026)

Claim 22 clm-a9420a183fbed03b quantitative

free public transport on forecast smog days in December 2016 and January 2017

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: Radio Kraków reports Warsaw's first smog-related free transport in December 2016, decided on forecasts; PAP reports free transport on 9 January 2017 because of smog.
Caveat: No source located says whether the measure was used again after January 2017.

Sources carrying this claim

Radio Kraków — Smog nad Warszawą. Stolica podąża śladami Krakowa i... idzie o krok dalej (15 Dec 2016)
Forsal.pl (PAP) — Smog dusi warszawiaków. W poniedziałek darmowa komunikacja miejska (8 Jan 2017)

Claim 23 clm-36fe7b3677585d45 descriptive

was a mayoral decision, not a rule

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this file
What the mapping says: The report explains that in Warsaw free transport is introduced at discretion: the decision is taken by the mayor.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Radio Kraków — Smog nad Warszawą. Stolica podąża śladami Krakowa i... idzie o krok dalej (15 Dec 2016)

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 2026-10-17-baseline effective 2026-10-17 · created 2026-10-17

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

sha256:01b417562f1eef5ac80b7ffeb2151c52b43c50297ed83715d5b843c340af3497

Revision history → Permanent version link → Machine-readable record → Evidence Constitution →

23: of 23 claims mapped
10: source dossiers
6: publication dates recorded
0: archives linked
0: exact locators
0: content captures hashed

Governance facts carried by the record

Operator: City of Warsaw (Air Protection and Climate Policy Office), with sensors supplied and serviced under contract by Airly Public; alerts worked out by a municipal police (Straż Miejska) duty officer and sent through the Warszawa 19115 contact centre; state reference stations run by the Chief Inspectorate of Environmental Protection (GIOŚ)
Actor types: city-government, private
Funding model: mixed
Funding description: Bought within the 'Virtual Warsaw Functional Area' (Virtual WOF) project, 80% co-financed by the European Regional Development Fund under the Masovian Regional Operational Programme 2014–2020; in 2021 the city put the network's cost at around 4–5 million zł.
Cost: Not recorded
Ownership: Not recorded
Decision rights: Not recorded
Exit conditions: Not recorded

10 source dossiers

Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023) nik.gov.pl · 14 linked claims

Open original source ↗

Stable source ID: src-1eb924567e4ed7f6
Publisher: Name not classified · nik.gov.pl
Type / language: pdf · language not classified
Published: 2023-08-30
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
The Supreme Audit Office's post-audit statement to the Mayor of Warsaw (audit period from 1 January 2018). It records 10 measuring stations and 164 air-quality sensors (108 in Warsaw, 56 in 17 partner municipalities), the non-reference sensor system launched in 2022, two city stations built in 2020 to the Chief Inspectorate's standard, real-time publication on the city IoT platform from 14 September 2022 and in the Warszawa 19115 app, the city's own PM10 alert procedure with thresholds below the national ones, PM10 exceedance days for 2018–2022, and an overall positive assessment.
Descriptive only — not page/paragraph exact
Claims linked: clm-e5f4dcf35c536213
clm-995e9b146c71f974
clm-c78257ec8b4fae16
clm-87fdf641074dec7e
clm-4d88c2c6f0738014
clm-a015a36c3bdc1f4e
clm-c66546e35c4b2d61
clm-c6956d297f39172a
clm-d3e82c7216f19ebf
clm-2836ceee56d58fef
clm-dd147f289db60855
clm-fac27b6b598f9903
clm-6af651a1efaf21ed
clm-5ff099a4c545c544

Warszawa 19115 — Warszawski Indeks Powietrza (city knowledge base) warszawa19115.pl · 4 linked claims

Open original source ↗

Stable source ID: src-9cdba975b054b6a8
Publisher: Name not classified · warszawa19115.pl
Type / language: web-page · language not classified
Published: Not recorded
Updated: 2024-11-12
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
The city's description of the Warsaw Air Index (a four-level scale with advice for residents), of its measuring points (GIOŚ state stations plus the city's devices), of the two roadside stations built in 2020 at Grochowska street and Solidarności avenue, of the more than 160 sensors installed by 2022 (108 in the districts, the rest in 17 neighbouring municipalities), of what they measure, and of the 80% EU co-financing under the Virtual WOF project.
Descriptive only — not page/paragraph exact
Claims linked: clm-a73099011cadd292
clm-7111e355b3d86b4d
clm-87fdf641074dec7e
clm-748860cb357c84c7

TVN24 — Warsaw plans to install a network of air quality sensors (28 Apr 2021) tvn24.pl · background

Open original source ↗

Stable source ID: src-de39c06206963056
Publisher: Name not classified · tvn24.pl
Type / language: web-page · language not classified
Published: 2021-04-28
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Report on the city's tender for 165 sensors (108 in Warsaw, 57 in 17 neighbouring municipalities), with locations chosen by Warsaw University of Technology experts and an estimated cost of 4–5 million zł, partly EU-financed.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Airly — Warsaw Set to Have Europe's Largest Air Quality Monitoring Coverage (supplier's announcement of the city contract) airly.org · 2 linked claims

Open original source ↗

Stable source ID: src-18694aa8c355d559
Publisher: Name not classified · airly.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: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
The supplier's announcement of the contract signed on 30 December 2021 between Warsaw City Hall and Airly Public for a monitoring system at 165 locations, covered by Airly Public's technical service, with an option for 100 more sensors; it states the project's aim of designating areas of high pollutant concentrations, for example to inform low-emission zones or subsidy outreach.
Descriptive only — not page/paragraph exact
Claims linked: clm-aff3b1c95fdc2166
clm-480db2e0fe4a3183

Airly — Warsaw City Council case study (supplier) airly.org · 1 linked claim

Open original source ↗

Stable source ID: src-3054ba05270f5ab2
Publisher: Name not classified · airly.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: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
The supplier's case study of the Warsaw network; it describes maintenance as including verification of sensor measurements and random comparative tests against state reference stations, and argues that dense low-cost networks supplement but depend on the state stations.
Descriptive only — not page/paragraph exact
Claims linked: clm-a73099011cadd292

Super Express — Czujników smogu jak nie było, tak nie ma. Znów opóźnia się ich budowa (25 Sep 2019) se.pl · background

Open original source ↗

Stable source ID: src-cc3964661d48475c
Publisher: Name not classified · se.pl
Type / language: web-page · language not classified
Published: 2019-09-25
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Report that the planned 170 small sensors and the large stations were delayed and would miss the 2019 heating season; the director of the city's Air Protection and Climate Policy Office expected first results around the turn of 2019/2020.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Radio Kraków — Smog nad Warszawą. Stolica podąża śladami Krakowa i... idzie o krok dalej (15 Dec 2016) radiokrakow.pl · 2 linked claims

Open original source ↗

Stable source ID: src-0c6e82038094b4d1
Publisher: Name not classified · radiokrakow.pl
Type / language: web-page · language not classified
Published: 2016-12-15
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Report on Warsaw's first smog-related free public transport, with ticket validators switched off; it explains that Warsaw decides on forecasts and at the mayor's discretion, unlike Kraków's rule based on the previous day's measurements.
Descriptive only — not page/paragraph exact
Claims linked: clm-a9420a183fbed03b
clm-36fe7b3677585d45

Forsal.pl (PAP) — Smog dusi warszawiaków. W poniedziałek darmowa komunikacja miejska (8 Jan 2017) forsal.pl · 1 linked claim

Open original source ↗

Stable source ID: src-dc93eb1d4c69f57d
Publisher: Name not classified · forsal.pl
Type / language: web-page · language not classified
Published: 2017-01-08
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
PAP report that city transport in Warsaw would be free on Monday 9 January 2017 because of smog, quoting the city hall: validators switched off.
Descriptive only — not page/paragraph exact
Claims linked: clm-a9420a183fbed03b

Warszawa 19115 — Zakaz spalania węgla w Warszawie (city knowledge base) warszawa19115.pl · 1 linked claim

Open original source ↗

Stable source ID: src-03c02d552368689d
Publisher: Name not classified · warszawa19115.pl
Type / language: web-page · language not classified
Published: Not recorded
Updated: 2026-01-23
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
The city's explanation that since 1 October 2023 hard coal and coal-based solid fuels may not be burned within Warsaw's boundaries, a ban introduced by the Masovian regional assembly in its amended anti-smog resolution, with a list of city and national grants for replacing heating.
Descriptive only — not page/paragraph exact
Claims linked: clm-3d752e35bf63373d

elektromobilni.pl — Elektryczny smogowóz tropi trucicieli. 370 zgłoszeń w styczniu (19 Feb 2026) elektromobilni.pl · 1 linked claim

Open original source ↗

Stable source ID: src-dbb40056d745d60a
Publisher: Name not classified · elektromobilni.pl
Type / language: web-page · language not classified
Published: 2026-02-19
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-10-17
Dossier created: 2026-10-17
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Report on the municipal police's electric 'smog van' in service since December 2025: 370 air-pollution reports in January 2026, 25 fines and seven cautions; about 500 inspections a month; and air quality monitored by city stations, GIOŚ stations and 108 additional sensors in the city.
Descriptive only — not page/paragraph exact
Claims linked: clm-514cd253ee8e272d

Known limits of this file

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.