1001 Smart Cities

Permanent project revision

SAWACO Water-Loss Reduction & District Metering

Revision 2026-08-15-baseline · effective 2026-08-15

Superseded. A later revision exists: 2026-08-20-source-dates-b2 →

unreviewed

Created the first structured Evidence Passport with 9 claims and 6 source dossiers.

sha256:0fbd59ff8795f7640112a00891c0a54c09f84f7a55bfa72960c643e8bf17ec32
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.
9
of 9 claims mapped
6
source dossiers
0
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-d46d0390e8c0e788 quantitative
lost around 40 percent of its drinking water
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The IGES chapter estimates non-revenue water at about 40% of total production as of 2011.
Caveat
Baseline estimates vary by year and method; other reviews put the mid-2000s figure above 40%.

Sources carrying this claim

  1. IGES — Water resources management in Ho Chi Minh City (policy report chapter)
Claim 2 clm-c964fa381591175d quantitative
In 2008 the utility SAWACO signed a World Bank-financed performance-based contract with Manila Water
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The World Bank case study documents the 2008 signing with Manila Water; the IWA account confirms the 2008 start as a World Bank initiative.
Caveat
One legal review dates the contract's effective start to 2010; sources differ on signing versus mobilization.

Sources carrying this claim

  1. World Bank PPP — HCMC NRW performance-based contract case study
  2. IWA — Performance-based contracts for NRW reduction in Vietnam
Claim 3 clm-556affdf426ffab2 quantitative
a 23-square-kilometre area with about 140,000 connections
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Describes Zone 1 as a 23 km² area comprising approximately 140,000 connections across four districts.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. White & Case — Plugging the gap (global water-loss review)
Claim 4 clm-88344cef7f9006af quantitative
more than 100 continuously metered district areas
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Both accounts describe the DMA build-out; White & Case counts 114 DMAs built, the World Bank case study 119 planned.
Caveat
The two sources give different DMA counts (114 built vs 119 planned), which is why only 'more than 100' is asserted.

Sources carrying this claim

  1. White & Case — Plugging the gap (global water-loss review)
  2. World Bank PPP — HCMC NRW performance-based contract case study
Claim 5 clm-e0bdb64fb145da3e quantitative
targeted 37,500 cubic metres a day; about 92,000 were achieved
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
States the contracted target of 37,500 m³/day and the achieved reduction of approximately 92,000 m³/day — almost double the contracted volume.
Caveat
The IWA account gives 122 MLD saved over the six-year span — a cumulative-period figure measured differently.

Sources carrying this claim

  1. White & Case — Plugging the gap (global water-loss review)
Claim 6 clm-c44bfd4ba6f6b303 quantitative
roughly 12,000 leaks repaired
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Reports approximately 12,000 leaks repaired across 662 km of distribution network, with under 1% of pipes needing replacement.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. White & Case — Plugging the gap (global water-loss review)
Claim 7 clm-19422fdd579996d9 quantitative
non-revenue water of 11.97 percent by mid-2026
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The July 2026 report relays SAWACO's figure of 11.97% on a cumulative-volume basis.
Caveat
The utility's own figure; on a daily-average basis the same report gives 12.31%.

Sources carrying this claim

  1. Thanh Niên — SAWACO pulls water losses down to 11.97%
Claim 8 clm-d1009a8f3ab3f0a6 quantitative
92,000 cubic metres a day of leakage reduction against a contracted 37,500
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The case review states the achieved reduction of about 92,000 m³/day against the contracted 37,500 m³/day target.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. White & Case — Plugging the gap (global water-loss review)
Claim 9 clm-f30568022a7a3368 quantitative
12.08 percent for the first half of 2025 and 11.97 percent by mid-2026
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
SAWACO's own post gives 12.08% for H1 2025; the July 2026 press report gives 11.97%.
Caveat
Both are operator-reported; no independent audit of the loss accounting was found.

Sources carrying this claim

  1. SAWACO — losses down to 12.08% in H1 2025
  2. Thanh Niên — SAWACO pulls water losses down to 11.97%

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 2026-08-15-baseline effective 2026-08-15 · created 2026-08-15

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

sha256:0fbd59ff8795f7640112a00891c0a54c09f84f7a55bfa72960c643e8bf17ec32
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
9
of 9 claims mapped
6
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
SAWACO (Saigon Water Corporation)
Actor types
utility
Funding model
mixed
Funding description
World Bank-financed performance-based contract (Zone 1); SAWACO investment
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

World Bank PPP — HCMC NRW performance-based contract case study ppp.worldbank.org · 2 linked claims

Open original source ↗

Stable source ID
src-67f2071538a80b3a
Publisher
Name not classified · ppp.worldbank.org
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-15
Dossier created
2026-08-15
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Case study of the 2008 contract with Manila Water: 119 DMAs planned and a leakage-reduction target of at least 38 MLD. The PDF answers automated fetches with HTTP 403; content verified via the search index and secondary reviews.

Descriptive only — not page/paragraph exact
Claims linked
White & Case — Plugging the gap (global water-loss review) whitecase.com · 5 linked claims

Open original source ↗

Stable source ID
src-4bdf3d2390cf852e
Publisher
Name not classified · whitecase.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
2026-08-15
Dossier created
2026-08-15
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Carries the Zone 1 detail: 23 km², ~140,000 connections, 114 DMAs built, target of 26% / 37,500 m³ a day, ~92,000 m³ a day achieved, ~12,000 leaks repaired.

Descriptive only — not page/paragraph exact
Claims linked
IWA — Performance-based contracts for NRW reduction in Vietnam iwa-network.org · 1 linked claim

Open original source ↗

Stable source ID
src-d2f642eda090a718
Publisher
Name not classified · iwa-network.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
2026-08-15
Dossier created
2026-08-15
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Professional-association account: the first PBC started 2008 as a World Bank initiative and saved 122 MLD over its six-year span (a cumulative-period figure that differs from White & Case's snapshot).

Descriptive only — not page/paragraph exact
Claims linked
Thanh Niên — SAWACO pulls water losses down to 11.97% thanhnien.vn · 2 linked claims

Open original source ↗

Stable source ID
src-b70e528bff9f86e4
Publisher
Name not classified · thanhnien.vn
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-15
Dossier created
2026-08-15
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

July 2026 report of the utility's current non-revenue-water figure (11.97% cumulative basis, 12.31% daily-average basis).

Descriptive only — not page/paragraph exact
Claims linked
SAWACO — losses down to 12.08% in H1 2025 sawaco.com.vn · 1 linked claim

Open original source ↗

Stable source ID
src-c2e78eeb1820f359
Publisher
Name not classified · sawaco.com.vn
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-15
Dossier created
2026-08-15
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The operator's own reporting of the first-half-2025 rate.

Descriptive only — not page/paragraph exact
Claims linked
IGES — Water resources management in Ho Chi Minh City (policy report chapter) iges.or.jp · 1 linked claim

Open original source ↗

Stable source ID
src-5f876890c7cb66d7
Publisher
Name not classified · iges.or.jp
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-15
Dossier created
2026-08-15
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Research-institute chapter putting non-revenue water at about 40% of production (2011 data) — the baseline the reductions are measured against.

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.