Boreholes in the Thessaloniki plain which are used to supply water to the wider urban area can be grouped together as follows:
- Sindos – Kalohori aqueduct
- Axios aqueduct
Sindos – Kalohori aqueduct
The Sindos – Kalohori aqueduct consists of the following sections:
- Transmission pipes
- Sedimentation tank
- Kalohori pump station
- Dendropotamos pump station
Many boreholes were sunk in the 1970s around the Sindos – Kalohori aqueduct. Of those, 15 are in operation today and the quantity of water that can be abstracted from the aquifer is around 28,000 m3 a day. Water is abstracted from here in the summer to bolster the water supply system, and in winter are out of use allowing the aquifer to naturally replenish. Water is transmitted via pipelines to the Kalohori pump station having first undergone primary treatment in the sedimentation tank. It is then pushed on to the Dendropotamos pump station and distributed for consumption.
The Axios Aqueduct
The Axios aqueduct consists of the following sections:
- Transmission pipeline
- Diavata tank
A total of 30 boreholes have been opened in the aquifer in the wider Axios river area. Of those, 9 are in operation today and the quantity of water that can be abstracted from the aquifer is around 15,000 m3 a day.
The water is pumped from the Axios, Eleousa, and Gefira area boreholes and collected and transferred via a 15 km pipeline to the Diavata tank, from where it is distributed to the network for consumption.