Authority says proposals were filed last week
Manx Utilities has submitted a planning application for a new sewage treatment works in Garff.
The authority says the proposals were submitted through the planning portal on 31 July.
Discussions with impacted landowners have been ongoing, and some changes have been made to the pipeline routes.
The application is yet to be published on government's planning website.

Rider dies following MGP qualifying incident
Four freed from car after Foxdale crash
‘Cover-up’: Details of ‘peaceful protest’ at prison disputed
Castletown Commissioners brands Market Square vandalism an 'act of stupidity'