The world's most precise water costs $120,000 a gallon
The world's most precise water costs $120,000 a gallon Ellsworth Toohey 10:16 am Mon Aug 3, 2026 Vienna Standard Mean Ocean Water — Senior Airman Zachary Foster / U.S. Air Force / Public domain (Wikimedia Commons) A 5-milliliter ampoule of the world's most precise water sells for $159 — about $120,000 a gallon, Signore Galilei writes. It is Vienna Standard Mean Ocean Water (VSMOW), and labs buy it because water's freezing point varies based on its elemental isotopes.
- ▪The world's most precise water costs $120,000 a gallon Ellsworth Toohey 10:16 am Mon Aug 3, 2026 Vienna Standard Mean Ocean Water — Senior Airman Zachary Foster / U.S.
- ▪Air Force / Public domain (Wikimedia Commons) A 5-milliliter ampoule of the world's most precise water sells for $159 — about $120,000 a gallon, Signore Galilei writes.
- ▪It is Vienna Standard Mean Ocean Water (VSMOW), and labs buy it because water's freezing point varies based on its elemental isotopes.
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| Original publisher | Boing Boing |
| Canonical URL | https://boingboing.net/2026/08/03/vsmow-official-water.html |
| Publication time | Mon, 03 Aug 2026 17:16:28 +0000 |
| Retrieval time | 2026-08-03T17:45:46.801Z |
| Last seen | 2026-08-03T17:45:46.801Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | Q24enCSgRHvA · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
The world's most precise water costs $120,000 a gallon Ellsworth Toohey 10:16 am Mon Aug 3, 2026 Vienna Standard Mean Ocean Water — Senior Airman Zachary Foster / U.S. Air Force / Public domain (Wikimedia Commons) A 5-milliliter ampoule of the world's most precise water sells for $159 — about $120,000 a gallon, Signore Galilei writes. It is Vienna Standard Mean Ocean Water (VSMOW), and labs buy it because water's freezing point varies based on its elemental isotopes. About 1 in 10,000 hydrogen atoms is deuterium, and 1 in 500 oxygen atoms is oxygen-18. Those heavier isotopes stay frozen at higher temperatures, raising ordinary water's freezing point by roughly 0.001 degrees Celsius. They also evaporate more slowly, so rainwater is lighter than ocean water.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Boing Boing.
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