1001 Smart Cities
🇮🇩 Jakarta

Jakarta Neighbourhood Flood Sirens and Sensor Posts

🤖 AI-generated summary · ◆ 8 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.

8 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

✎ Corrected 27 Aug 2026 Record revised. · 2 revisions in all What changed →

Six sensor posts cost Rp 4,073,901,441 in 2020, a price that drew ridicule. When a councillor reported a silent siren in 2025, the only check available was the agency inspecting its own device.

Outcome🔄 Ongoing
Evidence📰 Mediagrades the sourcing — this entry states no impact figure
what does this mean?The strongest source is press reporting; no primary evaluation was located. It grades who did the looking — not how well the project went. All four grades →
Run byBadan Penanggulangan Bencana Daerah (BPBD) DKI Jakarta
Scale🏙️ City-wide
FundingJakarta city budget, with some warning posts granted by the Japanese government

Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 10 more in Jakarta · 🌊 Flood resilience guide · 🌱 Environment projects

Jakarta's disaster agency, BPBD, runs the last mile of flood warning: pole-mounted loudspeakers that sound in the neighbourhood itself, plus radio, SMS and WhatsApp blasts from its own control room. Fourteen areas had a set in place by 2019; six more cost Rp 4,073,901,441 in 2020, a price that drew ridicule. During 2024 the agency installed digital posts at 90 points across 69 kelurahan, each carrying eight sensors — water level, flow, wind speed and direction, current speed, temperature, humidity and rainfall — feeding its disaster-management system automatically; it described the locations as provisional and the work as running to December 2024. The trigger often sits outside the city: water passing the Katulampa weir upstream is forecast to reach Jakarta about nine to twelve hours later. In March 2025 a councillor reported a silent siren in Pengadegan; BPBD inspected the device and said it worked.

Live 📅 since 2019

🎓 Lesson

Warning hardware is easy to install and hard to prove working. No evaluation of these posts has been published in seven years — not how many households hear a siren, not whether anyone moved. When a siren was reported silent in March 2025 the only check available was the operating agency inspecting its own device and declaring it normal, and the two accounts have never been reconciled. The one number that is solid describes the river, not the equipment: the forecast travel time from the upstream weir.

🌱 EnvironmentFlood resilienceSafety & securitySensors & IoTWater

Sources

↗ BPBD DKI Jakarta — flood early warningPublished 26 September 2025The agency's own page on the flood early-warning arrangements, dated 26 September 2025.
↗ ANTARA News, 12 Nov 2024 — 90 digital early-warning posts installedBPBD head of data and information Mohammad Yohan: 90 digital early-warning units installed during 2024 across 69 kelurahan; eight sensors per unit; alerts sent by radio, SMS and WhatsApp from BPBD headquarters; data feeds the SIMBA disaster information system.
↗ detikNews, 12 Nov 2024 — the digital flood warning devicesPer-district breakdown of the 90 units, and the predecessor loudspeaker generation: four horns on a pole, VHF digital radio link to the BPBD control room, roughly 500 m audible radius, three alert levels.
↗ Suara.com, 15 Jan 2020 — six loudspeaker sets for Rp 4 billionFourteen warning sites already installed by 2019; six more budgeted at Rp 4,073,901,441 after the January 2020 flood; each set linked to automatic weather stations and water-level recorders; source of the cost controversy.
↗ detikNews, 5 Mar 2025 — councillor reports a warning device that did not soundCounterweight: councillor August Hamonangan reports the Pengadegan loudspeaker did not sound during the 3-4 March 2025 flood although Katulampa had reached a critical level, and asks whether the budget would be better spent on reservoirs and polders.
Show 2 more sourcesShow fewer
↗ Suara.com, 6 Mar 2025 — BPBD says the device works normallyBPBD's reply: an on-site check found the device working normally, and this particular unit was a Japanese government grant. Supports both the rebuttal and the mixed funding.
↗ Kompas Megapolitan, 5 Jul 2025 — nine hours from Katulampa to JakartaPublished 5 July 2025Kompas Megapolitan, 5 July 2025, read in full through a text-extraction proxy: a siaga 3 reading at the Katulampa weir in Bogor means the water is expected in Jakarta 'sembilan hingga 12 jam' later - nine to twelve hours.

📅 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 2019. 7 of 7 sources carry a publication date, from 15 January 2020 to 26 September 2025.

When the sources were published

  1. Suara.com · pressSuara.com, 15 Jan 2020 — six loudspeaker sets for Rp 4 billion
  2. ANTARA · pressANTARA News, 12 Nov 2024 — 90 digital early-warning posts installed
  3. detikcom · pressdetikNews, 12 Nov 2024 — the digital flood warning devices
  4. detikcom · pressdetikNews, 5 Mar 2025 — councillor reports a warning device that did not sound
  5. Suara.com · pressSuara.com, 6 Mar 2025 — BPBD says the device works normally
  6. Kompas · pressKompas Megapolitan, 5 Jul 2025 — nine hours from Katulampa to Jakarta
  7. BPBD DKI Jakarta (Jakarta Regional Disaster Management Agency) · city governmentBPBD DKI Jakarta — flood early warning

Every source, with links ↑

What happened to this record

  1. Sources last read
  2. Record revised
  3. Publication date recorded for 7 sources
  4. Entered the record

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 8 claims with their sources · the forensic record

Evidence Passport · public beta 8 addressable claims, 7 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 8

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-2da7b18243d45d04 descriptive
pole-mounted loudspeakers that sound in the neighbourhood itself, plus radio, SMS and WhatsApp blasts from its own control room
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The agency's own early-warning page describes the loudspeaker sets in flood-prone neighbourhoods alongside its radio, SMS and messaging dissemination.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. BPBD DKI Jakarta — flood early warning
Claim 2 clm-c95d05e5403deb14 quantitative
Fourteen areas had a set in place by 2019; six more cost Rp 4,073,901,441 in 2020, a price that drew ridicule
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The January 2020 report names the budget of Rp 4,073,901,441 for six loudspeaker sets, lists fourteen areas already fitted up to 2019, and is framed around the mockery the price attracted.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Suara.com, 15 Jan 2020 — six loudspeaker sets for Rp 4 billion
Claim 3 clm-f0b71539f26cf319 quantitative
During 2024 the agency installed digital posts at 90 points across 69 kelurahan, each carrying eight sensors — water level, flow, wind speed and direction, current speed, temperature, humidity and rainfall — feeding its disaster-management system automatically
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Both 12 November 2024 reports quote the agency's data centre head: 90 points across 69 kelurahan in 2024, eight sensors per unit covering exactly those variables, with alerts entering the Simba disaster-management system automatically.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. ANTARA News, 12 Nov 2024 — 90 digital early-warning posts installed
  2. detikNews, 12 Nov 2024 — the digital flood warning devices
Claim 4 clm-dfd15f66f7a87009 quantitative
it described the locations as provisional and the work as running to December 2024
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The ANTARA report quotes the agency saying the location data is provisional and may shift with field conditions, and that the programme was targeted to run until December 2024.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. ANTARA News, 12 Nov 2024 — 90 digital early-warning posts installed
Claim 5 clm-29e3a88c3272de7a descriptive
water passing the Katulampa weir upstream is forecast to reach Jakarta about nine to twelve hours later
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 5 July 2025 report states that water from the Katulampa weir is expected to arrive in Jakarta about nine to twelve hours after it is observed — the headline quotes only the nine.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Kompas Megapolitan, 5 Jul 2025 — nine hours from Katulampa to Jakarta
Claim 6 clm-e13f1322a4c11943 quantitative
In March 2025 a councillor reported a silent siren in Pengadegan; BPBD inspected the device and said it worked
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 5 March 2025 report carries the councillor's account of a loudspeaker in Pengadegan that failed to sound while the water level at the Katulampa dam was rising; the 6 March report carries the agency's reply that its staff checked the device on site and found it working normally.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. detikNews, 5 Mar 2025 — councillor reports a warning device that did not sound
  2. Suara.com, 6 Mar 2025 — BPBD says the device works normally
Claim 7 clm-fc92f56467748648 descriptive
No evaluation of these posts has been published in seven years — not how many households hear a siren, not whether anyone moved
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Neither the agency's own page nor the 2024 rollout coverage reports any measure of reach or of resident response; both describe installation and coverage only.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. BPBD DKI Jakarta — flood early warning
  2. ANTARA News, 12 Nov 2024 — 90 digital early-warning posts installed
Claim 8 clm-32cf194b9378293f descriptive
the only check available was the operating agency inspecting its own device and declaring it normal, and the two accounts have never been reconciled
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The dispute is documented only as the councillor's report on 5 March and the agency's own on-site check reported on 6 March; no later source revisits it.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. detikNews, 5 Mar 2025 — councillor reports a warning device that did not sound
  2. Suara.com, 6 Mar 2025 — BPBD says the device works normally
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 2026-08-27-editorial-review effective 2026-07-26 · created 2026-08-27

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

sha256:360b9594619f0df89e506a27ed00ea7757730eafc127deddc8bf73911c02a7fa
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
8
of 8 claims mapped
7
source dossiers
7
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Badan Penanggulangan Bencana Daerah (BPBD) DKI Jakarta
Actor types
city-government
Funding model
mixed
Funding description
Jakarta city budget, with some warning posts granted by the Japanese government
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

7 source dossiers

BPBD DKI Jakarta — flood early warning bpbd.jakarta.go.id · 2 linked claims

Open original source ↗

Stable source ID
src-6b2808c4de85362e
Publisher
Name not classified · bpbd.jakarta.go.id
Type / language
web-page · language not classified
Published
2025-09-26
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The agency's own page on the flood early-warning arrangements, dated 26 September 2025.

Descriptive only — not page/paragraph exact
Claims linked
ANTARA News, 12 Nov 2024 — 90 digital early-warning posts installed antaranews.com · 3 linked claims

Open original source ↗

Stable source ID
src-1ed1ff738dc0035e
Publisher
Name not classified · antaranews.com
Type / language
web-page · language not classified
Published
2024-11-12
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

BPBD head of data and information Mohammad Yohan: 90 digital early-warning units installed during 2024 across 69 kelurahan; eight sensors per unit; alerts sent by radio, SMS and WhatsApp from BPBD headquarters; data feeds the SIMBA disaster information system.

Descriptive only — not page/paragraph exact
Claims linked
detikNews, 12 Nov 2024 — the digital flood warning devices news.detik.com · 1 linked claim

Open original source ↗

Stable source ID
src-faff4d1da4779670
Publisher
Name not classified · news.detik.com
Type / language
web-page · language not classified
Published
2024-11-12
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Per-district breakdown of the 90 units, and the predecessor loudspeaker generation: four horns on a pole, VHF digital radio link to the BPBD control room, roughly 500 m audible radius, three alert levels.

Descriptive only — not page/paragraph exact
Claims linked
Suara.com, 15 Jan 2020 — six loudspeaker sets for Rp 4 billion suara.com · 1 linked claim

Open original source ↗

Stable source ID
src-84852568849c989c
Publisher
Name not classified · suara.com
Type / language
web-page · language not classified
Published
2020-01-15
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fourteen warning sites already installed by 2019; six more budgeted at Rp 4,073,901,441 after the January 2020 flood; each set linked to automatic weather stations and water-level recorders; source of the cost controversy.

Descriptive only — not page/paragraph exact
Claims linked
detikNews, 5 Mar 2025 — councillor reports a warning device that did not sound news.detik.com · 2 linked claims

Open original source ↗

Stable source ID
src-fbdf25a00e2220e3
Publisher
Name not classified · news.detik.com
Type / language
web-page · language not classified
Published
2025-03-05
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Counterweight: councillor August Hamonangan reports the Pengadegan loudspeaker did not sound during the 3-4 March 2025 flood although Katulampa had reached a critical level, and asks whether the budget would be better spent on reservoirs and polders.

Descriptive only — not page/paragraph exact
Claims linked
Suara.com, 6 Mar 2025 — BPBD says the device works normally suara.com · 2 linked claims

Open original source ↗

Stable source ID
src-2b331abd73b523cb
Publisher
Name not classified · suara.com
Type / language
web-page · language not classified
Published
2025-03-06
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

BPBD's reply: an on-site check found the device working normally, and this particular unit was a Japanese government grant. Supports both the rebuttal and the mixed funding.

Descriptive only — not page/paragraph exact
Claims linked
Kompas Megapolitan, 5 Jul 2025 — nine hours from Katulampa to Jakarta megapolitan.kompas.com · 1 linked claim

Open original source ↗

Stable source ID
src-a977216450e531ce
Publisher
Name not classified · megapolitan.kompas.com
Type / language
web-page · language not classified
Published
2025-07-05
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-27
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Kompas Megapolitan, 5 July 2025, read in full through a text-extraction proxy: a siaga 3 reading at the Katulampa weir in Bogor means the water is expected in Jakarta 'sembilan hingga 12 jam' later - nine to twelve hours.

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

🇮🇩 Jakarta Smart City · Jakarta Two agencies, two systems: JAKI and Pantau Banjir show the water on a screen; BPBD's pole loudspeakers shout it down the alley. 🇰🇷 Busan Urban Flood Warning System (Busan Safety ON) · Busan Busan grades 201 neighbourhoods on a web portal; Jakarta bolts loudspeakers to poles — both warn faster than they can act. 🇮🇳 Bengaluru Urban Flood Early-Warning Network · Bengaluru Bengaluru's gauges help crews position for rescue; Jakarta's nine-hour lead from the Katulampa weir does the same job from upstream.

Explore the wider context

📟 A Reading Is Not a Decision📖 Flood early-warning system📖 Automated speed enforcement (speed cameras)📖 District metering area (DMA)
📎 Cite this project

1001 Smart Cities (2026). “Jakarta Neighbourhood Flood Sirens and Sensor Posts” — Jakarta, Indonesia. The Smart City Atlas. https://1001smartcities.org/projects/jakarta-flood-warning-sirens/ (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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