Anglian Water has invested more than £3 million in Suffolk to install first-time sewerage systems.
This is part of a broader £20 million investment across the Anglian Water region.
The schemes include the installation of nine pumping stations, two vacuum stations, and more than 70 km of pipes.
This will enable 534 homes across the region to connect to the main sewerage network for the first time.
The completion of these schemes is expected to reduce pollution incidents, which were more frequent in areas with underperforming private drainage systems.
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Customer experience coordinator for the schemes, Chloe Bailey, said: “We’re delighted to have been able to deliver these projects for hundreds of customers.
"Things may not seem any different when they flush the toilet or use the shower, but this work will help protect the area from flooding and reduce the risk of pollutions in the future."
The projects form part of the company's largest ever investment programme from 2020 to 2025.
A further £100 million investment into similar schemes is proposed for 2025 to 2030.
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