***Project Update - March 2020*** 

Due to the ongoing Coronavirus (Covid-19) outbreak, this project has been paused. We will let customers know when the project is resumed.

To find out more about Scottish Water's response to the Coronavirus, click here.

Latest Update

Work to expand the capacity of Ardersier Waste Water Treatment Works is progressing well, with the main excavations within the site largely complete and construction of concrete aeration and settlement tanks well advanced.  

Work to extend the marine outfall pipeline from the Waste Water Treatment Works, east of Fort George, was completed in early June 2019. The new, longer outfall extends 300 metres into the Moray Firth between Fort George and Whiteness, enabling the treated effluent from the Works to be discharged into deeper, faster flowing water where it will disperse swiftly. It represents the latest milestone in a programme of investment to meet the needs of growing communities between Nairn and Inverness in the Highlands. 


For around 40 years, Scottish Water has operated a waste water treatment works at a site outside Ardersier. This essential facility is used to treat waste water collected from the village, as well as from homes and the businesses in the wider area - including Inverness Airport and a number of small settlements including Tornagrain and Fort George. Once the waste water has been treated at the works, it is safely returned to the environment via an outfall pipe to the Moray Firth.

Scottish Water is delivering improvements to our essential waste water infrastructure in the area. The purpose of these works is to meet the needs of housing and economic growth in the area – including Tornagrain, Inverness Airport and Castle Stuart - while protecting and enhance the environment of the Moray Firth. 

We are doing this through:

  • An expansion of the existing waste water treatment works within Scottish Water’s land to enable the facility to process an increased volume of waste water as a result of these growth projects.
  • Installing a new underground pipeline to transfer waste water from these developments to Ardersier Waste Water Treatment Works.
  • Installing ultra violet treatment equipment within the existing site - this will improve the disinfection of the waste water which comes into the facility. While the Ardersier waste water treatment works has served the area well for many years, we are required by our environmental regulator, Scottish Environment Protection Agency (SEPA), to improve the quality of the treated water which is safely returned to the environment. The main reason for doing this is to protect the bottlenose dolphins and help improve the quality of the water in the Moray Firth.
  • Extending the existing outfall pipe, near Fort George, by 300 metres - this will take the discharge of treated waste water further out to sea and into deeper water.

The below map shows the route of existing and new pipes in the area:

Adersier Investment Map

C1005 road closure arrangements

Following engagement about the operation of the Traffic Management Plan which is in place for the Waste Water Treatment Works site, it has been agreed with Highland Council that the road closure on the C1005 will remain in place during periods Scottish Water is using the route for construction traffic, but that the road will be open outside these times.  Normally, when the road is open, the road closure signs and barriers will be placed to the side of the road; however, for longer periods when the road is not expected to be in use for HGV construction traffic, the signage may be removed. 

When the road closure is not operating, the 30mph speed limit and signage remains in force for all traffic using the route.  Should Scottish Water's contractor need to bring in a vehicle via the C1005 at any time, the barriers and road closure would be put in place to allow this to happen.

From January, HGV traffic associated with the outfall extension will also use the C1005 operating via the established Traffic Management Plan.

Engagement with customers

We are pleased to have had the opportunity to meet many of our customers in Ardersier at past information events and meetings. The feedback given to us has been invaluable in helping to prepare for the work to be carried out and understand ways in which we can minimise the impact on our customers.

 If you would like to view the planning permissions and other related documents please see the links below for the Highland Council Portal:

Please enter the reference "10/02007/FUL" into the following link for the expansion of the waste water treatment works: Highland Council Portal.

Please enter the reference "16/02464/FUL" into the following link for the installation of ultra violet treatment at the treatment works: Highland Council Portal.

Ardersier Community Liaison Group

The aim of the Community Liaison Group is to minimise any negative impact and maximise the positive impact on the local community.  

The group will provide feedback and guidance on Scottish Water’s programme of engagement and communication with the local community, elected representatives and other stakeholders throughout the construction element of the approved projects. 

This will facilitate feedback and enable informed debate that will help Scottish Water identify areas of concern, explore solutions, aid communication and progress the projects.

Group membership
Chair: Kevin Reid

The Highland Council: Councillor Roderick Balfour, Councillor Trish Robertson, Councillor Glynis Sinclair, Robbie Bain, Ward Manager

Ardersier and Petty Community Council: Valery Kirby
The Ardersier Foundation: Lesley Smith, Abigail Reardon

Ardersier Community Support Group: Tricia Macpherson, Mya Chemonges
Scottish Water:  Paul Morley, Customer Delivery Team Manager; Gavin Steel: Corporate Affairs Manager (North)
Scottish Water Horizons: Brian James, Project Manager

ESD: Graeme Campbell, Project Manager

The Community Liaison Group welcomes feedback from residents in the village.  Comments or questions can be sent to ardersier@scottishwater.co.uk or to any of the members of the group.

The minutes from each meeting are published once reviewed and approved by members at the following meeting. All minutes and other project documentation can be found by following this link: All meeting minutes and other related documentation