The project follows growing environmental concerns linked to marine pollution and public health. Gibraltar’s government said planning and design work are now underway after a long-term contract was awarded in 2025.

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Officials said Gibraltar’s seawater-based sewer system creates additional technical challenges for wastewater treatment infrastructure. Environmental groups have welcomed progress towards a treatment facility, arguing the project could help reduce marine pollution, protect ecosystems and improve coastal water quality. The territory’s government has described the planned plant as a major long-term environmental investment for Gibraltar’s coastline and surrounding waters.