1001 Smart Cities
🇮🇳 Bengaluru

Hyperlocal Air Mapping: Sensor Network and Mobile Monitoring

🤖 AI-generated summary · ◆ 7 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.

7 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

✎ Updated 26 Aug 2026 7 claims added. What changed →

About 14 regulatory stations serve 14 million people, so a think tank built its own. Its monitors found black carbon at 56 micrograms per cubic metre on highways, 10 on residential roads.

Outcome🔄 Ongoing
Evidence🔬 Peer-reviewed
what does this mean?The strongest source behind this entry is an independent peer-reviewed or academic study. It grades who did the looking — not how well the project went. All four grades →
Run byCenter for Study of Science, Technology and Policy (CSTEP), with ILK Labs
Scale🏙️ City-wide

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

Bengaluru has about 14 regulatory air-quality stations for some 14 million people, so the think tank CSTEP has spent years filling the gaps: a low-cost PM2.5 sensor network of roughly 40 to 55 nodes on a 1 km grid, run with ILK Labs. A CNG car carrying research-grade monitors drove about 10% of the city's roads between November 2021 and June 2022, and the resulting on-road pollution maps were published through Google's Environmental Insights Explorer in July 2023. Since December 2023 CSTEP also runs Indi-SET, which it calls India's first facility for calibrating low-cost air sensors against reference instruments.

Live 📅 since 2021

📊 Impact

Peer-reviewed mobile mapping found mean on-road black carbon of roughly 10 micrograms per cubic metre on residential roads, 22 on arterials and 56 on highways, at 30 m resolution (Science of the Total Environment, 2024).

🎓 Lesson

The instrument is not the finding; the resolution is. Regulatory stations measure ambient air at a handful of fixed points, and a station three kilometres away cannot see a neighbourhood's waste fire. Driving the same 150 kilometres of road about twenty-two times each produced a 30-metre map on which residential roads, arterials and highways separate by a factor of five — a gradient no station network of this size can resolve, and one that exists inside the distance most people walk. What the think tank built next says what is still missing: a calibration facility, because a cheap sensor is only worth what its reference check is worth.

🌱 EnvironmentAir qualitySensors & IoT

Sources

↗ Google Earth Outreach — Air Quality (partner)Confirms the Bengaluru partnership with CSTEP, the custom-fit CNG car with research-grade monitors, the Nov 2021 to June 2022 measurement window, the pollutants measured and the July 2023 launch of the maps. Bengaluru is the only non-Western city listed on the page.
↗ CSTEP — Mapping Bengaluru's air pollution using hybrid monitoring methods (27 July 2023)Operator source for the hybrid design: a CNG vehicle covering about 10% of the city's roads plus a city-wide network of 55 low-cost PM2.5 sensors; states that on-road levels consistently exceeded ambient levels.
↗ Science of the Total Environment (peer-reviewed) — Multi-season mobile monitoring of on-road air pollution in Bengaluru (2024)Published 9 January 2024 archived copyCarries the impact figures sentence-level: a roughly 150 km route with about 22 repeat measurements per road segment, 30 m resolution maps, and mean black carbon by road type. Authors from ILK Labs and CSTEP with three universities.
↗ CSTEP — Indi-SET sensor evaluation facility project pagePublished 24 October 2025Establishes the facility at CSTEP's Bengaluru campus in December 2023 with reference-grade instruments; 150+ low-cost sensors collocated to date. The 'India's first' framing is CSTEP's own claim and is attributed as such.
↗ Citizen Matters — Why Bengaluru needs hyperlocal air monitoring (25 Feb 2026)Currency check and honest counterweight: 14 regulatory stations citywide, CSTEP currently running about 40 multi-pollutant low-cost sensors on a 1 km grid, and the example of a regulatory station 3 km away missing local waste-burning spikes.

📅 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 2021. 4 of 5 sources carry a publication date, from 27 July 2023 to 25 February 2026.

When the sources were published

  1. Center for Study of Science, Technology and Policy (CSTEP) · researchCSTEP — Mapping Bengaluru's air pollution using hybrid monitoring methods (27 July 2023)
  2. PubMed (U.S. National Library of Medicine) · researchScience of the Total Environment (peer-reviewed) — Multi-season mobile monitoring of on-road air pollution in Bengaluru (2024)
  3. Center for Study of Science, Technology and Policy (CSTEP) · researchCSTEP — Indi-SET sensor evaluation facility project page
  4. Citizen Matters · pressCitizen Matters — Why Bengaluru needs hyperlocal air monitoring (25 Feb 2026)

Every source, with links ↑

What happened to this record

  1. Sources last read
  2. Entered the record
  3. 7 claims added

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 7 claims with their sources · the forensic record

Evidence Passport · public beta 7 addressable claims, 5 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 7

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-60d13b244b951c8c quantitative
Bengaluru has about 14 regulatory air-quality stations for some 14 million people
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The interview states that Bengaluru currently has 14 continuous ambient air-quality monitoring stations tracking air quality across the city.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Citizen Matters — Why Bengaluru needs hyperlocal air monitoring (25 Feb 2026)
Claim 2 clm-11d82f6e28bf065e quantitative
a low-cost PM2.5 sensor network of roughly 40 to 55 nodes on a 1 km grid, run with ILK Labs
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 2023 publication describes a citywide network of 55 low-cost sensors; the 2026 interview describes 40 multi-pollutant low-cost sensors placed on a 1 km by 1 km grid.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Citizen Matters — Why Bengaluru needs hyperlocal air monitoring (25 Feb 2026)
  2. CSTEP — Mapping Bengaluru's air pollution using hybrid monitoring methods (27 July 2023)
Claim 3 clm-bb96b80edfad3604 quantitative
A CNG car carrying research-grade monitors drove about 10% of the city's roads between November 2021 and June 2022, and the resulting on-road pollution maps were published through Google's Environmental Insights Explorer in July 2023
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The partner page describes the custom-fitted CNG car, the measurement window and the July 2023 publication of the maps; the think tank describes the vehicle covering about 10 per cent of the city's roads.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Google Earth Outreach — Air Quality (partner)
  2. CSTEP — Mapping Bengaluru's air pollution using hybrid monitoring methods (27 July 2023)
Claim 4 clm-99de981a7ce2d9e5 quantitative
Since December 2023 CSTEP also runs Indi-SET, which it calls India's first facility for calibrating low-cost air sensors against reference instruments
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The project page establishes the facility at the think tank's Bengaluru campus in December 2023 with reference-grade instruments; the 'India's first' framing is the operator's own.
Caveat
The 'first in India' framing is the operator's own claim, not an independent finding.

Sources carrying this claim

  1. CSTEP — Indi-SET sensor evaluation facility project page
Claim 5 clm-8e76f9cfe802b114 quantitative
Peer-reviewed mobile mapping found mean on-road black carbon of roughly 10 micrograms per cubic metre on residential roads, 22 on arterials and 56 on highways, at 30 m resolution (Science of the Total Environment, 2024)
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The published abstract states the mean black-carbon levels by road type for urban residential areas and the 30 m resolution of the maps.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Science of the Total Environment (peer-reviewed) — Multi-season mobile monitoring of on-road air pollution in Bengaluru (2024)
Claim 6 clm-9f315d0ee288f566 quantitative
Driving the same 150 kilometres of road about twenty-two times each produced a 30-metre map
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The study route included 150 unique kilometres with an average of about 22 repeat measurements per monitored road segment, from which 30 m resolution maps were generated.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Science of the Total Environment (peer-reviewed) — Multi-season mobile monitoring of on-road air pollution in Bengaluru (2024)
Claim 7 clm-43831b81325b0069 descriptive
a station three kilometres away cannot see a neighbourhood's waste fire
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The interview gives exactly this example: a regulatory station three kilometres away missing local waste-burning spikes.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Citizen Matters — Why Bengaluru needs hyperlocal air monitoring (25 Feb 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 2026-08-26-claim-mapping effective 2026-07-26 · created 2026-08-26

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

sha256:8a7264d2c5d6bb9bc927ac97b9043cb4b54908d9dd755079bd9ca151eeadd88d
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
7
of 7 claims mapped
5
source dossiers
4
publication dates recorded
1
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Center for Study of Science, Technology and Policy (CSTEP), with ILK Labs
Actor types
research
Funding model
Not recorded
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

5 source dossiers

Google Earth Outreach — Air Quality (partner) google.com · 1 linked claim

Open original source ↗

Stable source ID
src-e95dae75a0003890
Publisher
Name not classified · google.com
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
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Confirms the Bengaluru partnership with CSTEP, the custom-fit CNG car with research-grade monitors, the Nov 2021 to June 2022 measurement window, the pollutants measured and the July 2023 launch of the maps. Bengaluru is the only non-Western city listed on the page.

Descriptive only — not page/paragraph exact
Claims linked
CSTEP — Mapping Bengaluru's air pollution using hybrid monitoring methods (27 July 2023) web.cstep.in · 2 linked claims

Open original source ↗

Stable source ID
src-7b153779ed388e93
Publisher
Name not classified · web.cstep.in
Type / language
web-page · language not classified
Published
2023-07-27
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Operator source for the hybrid design: a CNG vehicle covering about 10% of the city's roads plus a city-wide network of 55 low-cost PM2.5 sensors; states that on-road levels consistently exceeded ambient levels.

Descriptive only — not page/paragraph exact
Claims linked
Science of the Total Environment (peer-reviewed) — Multi-season mobile monitoring of on-road air pollution in Bengaluru (2024) pubmed.ncbi.nlm.nih.gov · 2 linked claims

Open original source ↗

Stable source ID
src-1f7f8b17c1e8ca0d
Publisher
Name not classified · pubmed.ncbi.nlm.nih.gov
Type / language
web-page · language not classified
Published
2024-01-09
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
Open archived copy ↗ · 2025-02-06
Content hash
No captured content hash
Locator
Open the recorded source note

Carries the impact figures sentence-level: a roughly 150 km route with about 22 repeat measurements per road segment, 30 m resolution maps, and mean black carbon by road type. Authors from ILK Labs and CSTEP with three universities.

Descriptive only — not page/paragraph exact
Claims linked
CSTEP — Indi-SET sensor evaluation facility project page cstep.in · 1 linked claim

Open original source ↗

Stable source ID
src-2583f26b3cdcfe24
Publisher
Name not classified · cstep.in
Type / language
web-page · language not classified
Published
2025-10-24
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Establishes the facility at CSTEP's Bengaluru campus in December 2023 with reference-grade instruments; 150+ low-cost sensors collocated to date. The 'India's first' framing is CSTEP's own claim and is attributed as such.

Descriptive only — not page/paragraph exact
Claims linked
Citizen Matters — Why Bengaluru needs hyperlocal air monitoring (25 Feb 2026) citizenmatters.in · 3 linked claims

Open original source ↗

Stable source ID
src-6e58e67189cc0e0d
Publisher
Name not classified · citizenmatters.in
Type / language
web-page · language not classified
Published
2026-02-25
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Currency check and honest counterweight: 14 regulatory stations citywide, CSTEP currently running about 40 multi-pollutant low-cost sensors on a 1 km grid, and the example of a regulatory station 3 km away missing local waste-burning spikes.

Descriptive only — not page/paragraph exact
Claims linked
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

🇩🇪 BLUME Air-Quality Monitoring Network · Berlin Berlin runs about 15 reference stations and publishes the data openly; Bengaluru has about 14 for 14 million people. 🇮🇳 Mandatory Air Quality Sensors at Mumbai Construction Sites · Mumbai Mumbai forces builders to measure their own dust and struggles with compliance; Bengaluru's gap-filling sensors are run by a think tank. 🇬🇧 Breathe London Air-Quality Sensor Network · London Breathe London put 400+ low-cost nodes across every borough; CSTEP runs 40-55 on a 1 km grid and calibrates them against reference kit.

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). “Hyperlocal Air Mapping: Sensor Network and Mobile Monitoring” — Bengaluru, India. The Smart City Atlas. https://1001smartcities.org/projects/bangalore-hyperlocal-air-mapping/ (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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