# Southern Water upgrades Horsham Wastewater Treatment Works for £31M

Southern Water is undertaking a £31 million upgrade of its Horsham Wastewater Treatment Works in West Sussex, UK, which began in September 2022 and is expected to be completed in spring 2025. The project includes new inlet screens and Moving Bed Biofilm Reactors to improve effluent quality and capacity.

- Type: Expansion
- Announced: 2024-04-17
- Where: Horsham, West Sussex, United Kingdom
- Value: $39.3M (31.0M GBP)
- Starts operating: Q1 2025
- Status: under construction
- Products: wastewater treatment equipment, inlet screens, Moving Bed Biofilm Reactors
- Sectors: [Water Treatment Equipment](https://endata.com/sectors/water-treatment-equipment.md)

## Companies

- [Southern Water](https://endata.com/companies/7452.md)
- [Costain Group](https://endata.com/companies/388.md) (partner)
- [MWH Treatment](https://endata.com/companies/16127.md) (partner)

## Sources

- [waterbriefing.org](https://www.waterbriefing.org/home/company-news/item/21981-southern-water-major-%C2%A331-million-upgrade-of-horsham-wastewater-treatment-works-enters-final-year), 2024-04-17: "A massive upgrade of Southern Water’s Horsham Wastewater Treatment Works in West Sussex is entering its final year, in an effort to improve the site’s processes and capacity."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.