# Certifying and trading purified water transparently

> Botanical Water Technologies and Fujitsu developed a blockchain platform to trace purified water seamlessly from producer to consumer. The system enables the reliable certification of water resources and connects industrial suppliers with buyers across a distributed network. This establishes a transparent marketplace for sustainably sourced water as a service.

**Sector:** Tertiary sector · **Industry:** Public infrastructure and utilities · **Organisation:** Botanical Water Technologies, Fujitsu · **Maturity level:** Production

Canonical URL: https://www.sapientblock.com/en/use-cases/botanical-water-technologies-aufbereitetes-wasser-lueckenlos-zertifizieren

## Documentation status

- **Project status:** Production
- **Evidence:** Evidence medium
- **Editorial review:** pending

## Description

Botanical Water Technologies, together with Fujitsu, has launched a platform that manages the trade of certified water via a tamper-proof data structure. In many industries, purified water is produced as a by-product, which until now could hardly be marketed regionally due to a lack of reliable proof. By using distributed ledgers, production volumes, purity levels and transport routes are recorded transparently, allowing customers to purchase verified quality directly.

The technical foundation of the project is a blockchain infrastructure provided by Fujitsu based on Hyperledger. The system records data points directly at the treatment plants of Botanical Water Technologies and writes them immutably into the ledger. This creates a verified data chain documenting every step from water extraction through treatment to delivery to industrial end customers. On this basis, the Botanical Water Exchange functions as a marketplace establishing the principle of Water-as-a-Service. Due to the decentralised structure, external auditors and customers can independently verify the origin and compliance with strict environmental standards at any time.

## Benefits

- Efficient trade processing via a central marketplace for certified water
- Reliable evidence for corporate sustainability and ESG reporting
- Complete and tamper-proof documentation of the entire water value chain
- Simplified certification and fulfilment of regulatory environmental requirements
- Increased trust through manufacturer-independent verifiable ledger data
- Elimination of time-consuming manual documentation processes during audits
- Transparent real-time insight into quality parameters

## Challenges

- Acquisition of a sufficient number of trading and industrial partners to ensure liquidity
- Need for uniform global standards for the certification of treated water
- Effort required to integrate different data capture and sensor systems at the sites
- Training requirements for using the platform's digital auditing tools

## Technology foundation

The solution is based on an enterprise blockchain platform from Fujitsu using Hyperledger technology. The distributed ledger guarantees immutable logging of volume data, quality characteristics and proof of origin for every recorded drop of water. Thanks to the decentralised data structure, all participating trading partners can auditably and tamper-proof view the lifecycle of the treated water.

## Sources

- [Fujitsu and Botanical Water Technologies create the world-first blockchain water exchange](https://www.lfdecentralizedtrust.org/case-studies/fujitsu-bwt-case-study)
- [Customer stories – Botanical Water Technologies](https://global.fujitsu/en-us/customer-stories/cs-botanical-water-technologies-20230717)