| Dataset / deliverable | Release pattern | Approximate expected date of delivery | Notes |
|---|---|---|---|
| Submission of 2025-26 open data strategy to executive team | Yearly | April 2025 | Complete |
| Publication of Open Data Strategy 2025-26 | Yearly | June 2025 | Complete – published on 29/05/2025 |
| Rising mains Marketplace Challenge | One-off | July 2025 | Complete - published on Marketplace |
| Wessex Water Annual Performance Report Data Tables | Yearly | July 2025 | Complete – published 30/07/25 |
| Wessex Water Sewer Flooding | Yearly | August 2025 | Complete – published 29/08/25 |
| Wessex Water Night Flow Monitoring | Stream - Portal | Yearly | September 2025 | Complete – published 30/09/25 |
| Water quality customer contacts - appearance taste and odour - performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Mains repairs performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Supply interruptions performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Applications for assistance performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Void sites performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Pollution incidents performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Treatment works compliance performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Improving Sites of Special Scientific Interest (SSSI sites) performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Number of children or students engaged performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Sewer collapses performance commitment data | Yearly | September 2025 | Complete – published 30/09/25 |
| Wessex Water Event Duration Monitoring: Wessex Water Event Duration Monitoring 2020-2023 | Stream - Portal Wessex Water Event Duration Monitoring 2024 | Stream - Portal |
Monthly | October 2025 | Complete – published 2020-2024 data on 30/09/25. 2025 data first published on 30/09/25 and last updated on 30/10/25. |
| Wessex Water Sewer Catchment Boundaries | Stream - Portal | Yearly | November 2025 | |
| Wessex Water Appointed Water Supply Boundaries | Stream - Portal | Yearly | November 2025 | |
| Wessex Water Appointed Wastewater Boundaries | Stream - Portal | Yearly | November 2025 | |
| Wessex Water Storm Overflow Activity | Stream - Portal | Yearly | December 2025 | |
| Wessex Water Domestic Consumption | Stream - Portal | Yearly | February 2026 | |
| Wessex Water Reservoir Levels | Stream - Portal | Yearly | March 2026 | |
| Wessex Water Domestic Water Quality | Stream - Portal | Yearly | April 2026 | |
| Wessex Water Environmental Water Quality | Yearly | May 2026 | |
| Marketplace challenge | One-off | March 2026 | Topic to be confirmed |
| Hackathon 2026 | One-off | March 2026 | Building on the successes of the Open Data Day 2025 hackathon to engage with local data users |
