- EFLO International, Ltd.
 - Specialists in designing and building sewage treatment plants for both land and marine use. - Huber Technology
- Provides machinery, components, and systems for water treatment.
- Iseki Utility Services Limited
- Specialises in the design of vacuum sewerage systems and manufactures other key equipment.
- Owls Hall Environmental Limited
- Offers design, supply, installation, servicing, and de-sludging of pollution control and rainwater harvesting products including sewage treatment and storage, pump stations, separators, and rainwater harvesting products.
- WMEC Ltd.
- Developers and manufacturers of units for treating chemically contaminated water.
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