1001 Smart Cities
🇵🇱 Warsaw

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

🤖 AI-generated summary · ◆ 23 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.

23 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

Warsaw runs 108 of its own air sensors and warns earlier than the law requires. A reading still triggers only a message; the fines come from a coal ban and reports to the municipal police.

Outcome🔄 Ongoing
Evidence📊 Independent
what does this mean?The strongest source is an independent non-academic evaluation: an audit office, a government or EU review, or an NGO. It grades who did the looking — not how well the project went. All four grades →
Run byCity 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)
Scale🏙️ City-wide
FundingBought 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.

Part of 1001 Smart Cities — 1,216 documented projects · 🏙️ 8 more in Warsaw · 🌫️ Air quality guide · 🌱 Environment projects

Warsaw runs its own network of low-cost air sensors next to the state's reference stations. Switched on in 2022, it has 108 devices across all 18 districts and 56 more in 17 partner municipalities, supplied and serviced under contract by Airly Public. They measure particulate matter (PM1, PM2.5, PM10) and nitrogen dioxide, but not with the EU directive's reference methods; in 2020 the city also built two roadside stations to the state inspectorate's standard. Since 14 September 2022 all readings appear on the city's IoT map and in the Warszawa 19115 app, with a four-level Warsaw Air Index and advice for residents. Smog alerts are a separate track: a municipal police duty officer works them out from the state's data, at PM10 levels below the national thresholds.

Live 📅 since 2022

📊 Impact

The Supreme Audit Office (NIK), auditing the city's measures against traffic pollution from 2018 onward, assessed them positively in August 2023: Warsaw identified the problem reliably, measured air quality including breaches of the standards, and made the readings available to residents in real time. 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. The state and city stations recorded 43 to 62 days above the daily PM10 limit in 2018 and none from 2019 to 2022. No source located credits the sensor network with that change, and no independent check of the sensors' accuracy was found.

🎓 Lesson

A dense sensor network can show where the air is bad without deciding what happens next. Warsaw's own alerts are worked out from the state's reference data and end in a text or app message, at stricter levels than the law: orange above 80 µg/m³ of PM10, where the national information level is 100. The levers sit elsewhere: a ban on burning coal in Warsaw's stoves and fireplaces since 1 October 2023, written into the regional anti-smog resolution, and municipal police inspections, which in January 2026 followed 370 reports of air pollution and ended in 25 fines. Before the network, the one smog measure with a lever, free public transport on forecast smog days in December 2016 and January 2017, was a mayoral decision, not a rule.

🌱 EnvironmentAir qualitySensors & IoT

Sources

↗ Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)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.
↗ Warszawa 19115 — Warszawski Indeks Powietrza (city knowledge base)Updated 12 November 2024The 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.
↗ TVN24 — Warsaw plans to install a network of air quality sensors (28 Apr 2021)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.
↗ Airly — Warsaw Set to Have Europe's Largest Air Quality Monitoring Coverage (supplier's announcement of the city contract)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.
↗ Airly — Warsaw City Council case study (supplier)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.
Show 5 more sourcesShow fewer
↗ Super Express — Czujników smogu jak nie było, tak nie ma. Znów opóźnia się ich budowa (25 Sep 2019)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.
↗ Radio Kraków — Smog nad Warszawą. Stolica podąża śladami Krakowa i... idzie o krok dalej (15 Dec 2016)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.
↗ Forsal.pl (PAP) — Smog dusi warszawiaków. W poniedziałek darmowa komunikacja miejska (8 Jan 2017)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.
↗ Warszawa 19115 — Zakaz spalania węgla w Warszawie (city knowledge base)Updated 23 January 2026The 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.
↗ elektromobilni.pl — Elektryczny smogowóz tropi trucicieli. 370 zgłoszeń w styczniu (19 Feb 2026)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.

📅 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 2022. 6 of 10 sources carry a publication date, from 15 December 2016 to 19 February 2026.

When the sources were published

  1. Radio Kraków · pressRadio Kraków — Smog nad Warszawą. Stolica podąża śladami Krakowa i... idzie o krok dalej (15 Dec 2016)
  2. Forsal.pl (INFOR PL) · pressForsal.pl (PAP) — Smog dusi warszawiaków. W poniedziałek darmowa komunikacja miejska (8 Jan 2017)
  3. Super Express · pressSuper Express — Czujników smogu jak nie było, tak nie ma. Znów opóźnia się ich budowa (25 Sep 2019)
  4. TVN24 · pressTVN24 — Warsaw plans to install a network of air quality sensors (28 Apr 2021)
  5. Najwyższa Izba Kontroli (NIK) · oversight bodyNajwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)
  6. elektromobilni.pl · presselektromobilni.pl — Elektryczny smogowóz tropi trucicieli. 370 zgłoszeń w styczniu (19 Feb 2026)

Every source, with links ↑

What happened to this record

  1. Entered the record
  2. Sources last read

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 23 claims with their sources · the forensic record

Evidence file · public beta 23 addressable claims, 10 source dossiers, one permanent baseline. The file 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 23

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

  1. Warszawa 19115 — Warszawski Indeks Powietrza (city knowledge base)
  2. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. Najwyższa Izba Kontroli (NIK) — Wystąpienie pokontrolne P/23/064: Urząd m.st. Warszawy, działania na rzecz ograniczenia zanieczyszczeń komunikacyjnych (30 Aug 2023)
  2. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. Radio Kraków — Smog nad Warszawą. Stolica podąża śladami Krakowa i... idzie o krok dalej (15 Dec 2016)
  2. Forsal.pl (PAP) — Smog dusi warszawiaków. W poniedziałek darmowa komunikacja miejska (8 Jan 2017)
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 2026-10-17-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
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
TVN24 — Warsaw plans to install a network of air quality sensors (28 Apr 2021) tvn24.pl · background

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src-de39c06206963056
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Name not classified · tvn24.pl
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web-page · language not classified
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2021-04-28
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2026-10-17
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2026-10-17
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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.

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

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src-18694aa8c355d559
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Name not classified · airly.org
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web-page · language not classified
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Record last verified
2026-10-17
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2026-10-17
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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.

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

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src-3054ba05270f5ab2
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Name not classified · airly.org
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web-page · language not classified
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Record last verified
2026-10-17
Dossier created
2026-10-17
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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.

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

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src-cc3964661d48475c
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Name not classified · se.pl
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web-page · language not classified
Published
2019-09-25
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Record last verified
2026-10-17
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2026-10-17
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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.

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

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src-0c6e82038094b4d1
Publisher
Name not classified · radiokrakow.pl
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web-page · language not classified
Published
2016-12-15
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Record last verified
2026-10-17
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2026-10-17
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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.

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

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src-dc93eb1d4c69f57d
Publisher
Name not classified · forsal.pl
Type / language
web-page · language not classified
Published
2017-01-08
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Record last verified
2026-10-17
Dossier created
2026-10-17
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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.

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

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src-03c02d552368689d
Publisher
Name not classified · warszawa19115.pl
Type / language
web-page · language not classified
Published
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Updated
2026-01-23
Source last checked
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Record last verified
2026-10-17
Dossier created
2026-10-17
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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.

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

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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
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Record last verified
2026-10-17
Dossier created
2026-10-17
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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.

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Known limits of this file
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  • 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.

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Compare this project

🇶🇦 Doha Air Quality Monitoring Network: Measured, Published, Answered with Advice · Doha Both publish readings with an index: Doha's from a national ministry's stations, Warsaw's also from 108 city-owned low-cost sensors. 🇵🇱 Warszawa 19115: Warsaw's Single Contact Centre for Reports and Questions · Warsaw Readings and smog alerts reach residents through the Warszawa 19115 app. 🇵🇱 Warsaw's Clean Transport Zone and Its Plate-Reading Patrols · Warsaw The clean transport zone is a lever the sensors do not pull: no reading triggers it.

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). “Warsaw's Low-Cost Air Sensor Network and Municipal Smog Alerts” — Warsaw, Poland. The Smart City Atlas. https://1001smartcities.org/projects/warsaw-air-quality-monitoring/ (last verified 2026-10-17). Data: CC BY 4.0.

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

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