1001 Smart Cities

Permanent project revision

Citywide Smart Water Meter Rollout

Revision 2026-08-27-claims-and-sources · effective 2026-08-02

Superseded. A later revision exists: 2026-08-27-source-dating →

unreviewed

Created the first structured Evidence Passport with 6 claims and 2 source dossiers.

sha256:fc4c317a1373f097eac19bb522d188bb83a3ee868c82ce50e76cbf159e4b3dea
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.
6
of 6 claims mapped
2
source dossiers
1
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-37b4c852327f299b quantitative
Since 2019, Tianjin Water Group has been replacing residential analogue meters with remote-read NB-IoT smart meters that report consumption automatically and enable app-based (Alipay/WeChat) bill payment
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The conference coverage describes the remote-read smart meter programme run by Tianjin Water Group since 2019; the local service guide describes the meters reporting automatically and the app-based payment through Alipay and WeChat.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Water-conserving.cn: Tianjin water-conservation work conference coverage (24 Oct 2022)
  2. Tianjin Bendibao: how to apply for a smart water meter (2025)
Claim 2 clm-66aba87f316b37db quantitative
By an October 2022 municipal water-conservation conference, more than 3 million meters had been replaced and over 600 km of aged (50-plus-year) supply pipe renovated, and Tianjin's Municipal Water Authority reported the city's public water-supply network leakage rate had fallen to 9.4%
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 24 October 2022 coverage of the municipal water-conservation work conference gives all three figures: more than 3 million meters replaced, more than 600 km of aged pipe renovated, and a public water-supply network leakage rate of 9.4%.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Water-conserving.cn: Tianjin water-conservation work conference coverage (24 Oct 2022)
Claim 3 clm-79e6c3c135eb0084 quantitative
The replacement programme, run through Tianjin Water Group's district service centres, was still actively processing resident applications as of April 2025
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The local service guide, current in 2025, sets out how residents apply for a smart meter through the group's district service centres.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Tianjin Bendibao: how to apply for a smart water meter (2025)
Claim 4 clm-8882061a5a7ddd4e quantitative
Tianjin's public water-supply network leakage rate had fallen to 9.4% as of an October 2022 municipal conference, after Tianjin Water Group replaced more than 3 million meters and renovated over 600 km of aged pipe since 2019
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Same conference coverage: the leakage rate and the two programme figures are reported together.
Caveat
Reported by the municipal water authority at its own conference; no independent audit was found.

Sources carrying this claim

  1. Water-conserving.cn: Tianjin water-conservation work conference coverage (24 Oct 2022)
Claim 5 clm-49653b6d2f70bde9 quantitative
In the same period Tianjin Water Group renovated more than 600 km of supply pipe over fifty years old, so the 9.4% figure covers a network that was being physically rebuilt while it was being metered
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The conference coverage reports the pipe renovation and the metering programme over the same period and attaches the leakage figure to both.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Water-conserving.cn: Tianjin water-conservation work conference coverage (24 Oct 2022)
Claim 6 clm-02dab352dfb5784c descriptive
What the meters demonstrably changed is the billing relationship: readings arrive without a visit and residents pay through Alipay or WeChat
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The service guide describes automatic reporting of consumption and payment through the two apps.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Tianjin Bendibao: how to apply for a smart water meter (2025)

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 2026-08-27-claims-and-sources effective 2026-08-02 · created 2026-08-27

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

Erratum on this revision's envelope. The snapshot, its hash and its permanent link are untouched.

  • createdAt previously read 2026-09-04T17:00:00Z. The batching script that produced this revision advanced createdAt into the future to satisfy the strictly-increasing order the validator requires per entity. The value never recorded a real event; the corrected value is the moment the revision provably existed in the repository. Corrected to 2026-08-27T04:50:18Z on 2026-08-27; evidence: first appears in commit 54907acc76, committed 2026-08-27T04:50:18Z.
sha256:fc4c317a1373f097eac19bb522d188bb83a3ee868c82ce50e76cbf159e4b3dea
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
6
of 6 claims mapped
2
source dossiers
1
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Tianjin Water Group
Actor types
utility
Funding model
utility
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

2 source dossiers

Water-conserving.cn: Tianjin water-conservation work conference coverage (24 Oct 2022) waterconserving.cn · 4 linked claims

Open original source ↗

Stable source ID
src-f3f925f12e33cac0
Publisher
Name not classified · waterconserving.cn
Type / language
web-page · language not classified
Published
2022-10-24
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-02
Dossier created
2026-09-04
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

States the leakage rate fell to 9.4%, over 3 million smart meters were replaced, and names the Tianjin Municipal Water Authority (under a mayor-chaired, 16-department leadership group) as responsible.

Descriptive only — not page/paragraph exact
Claims linked
Tianjin Bendibao: how to apply for a smart water meter (2025) m.tj.bendibao.com · 3 linked claims

Open original source ↗

Stable source ID
src-b5bd966455f57cc6
Publisher
Name not classified · m.tj.bendibao.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
2026-08-02
Dossier created
2026-09-04
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

A local service guide describing how residents apply for a smart meter, current as of 2025.

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.