Muharraq STP Company is a Bahrain Shareholding Company (Closed), registered in the Kingdom of Bahrain with the Ministry of Industry, Commerce and Tourism under Commercial Registration Number 76856-1 obtained on 6 December 2010.

The Company manages infrastructure assets for a sewage treatment plant and wastewater conveyance system.

On 2 February 2011, the Company signed a Sewage Treatment Agreement (STA) with the Ministry of Works in the Kingdom of Bahrain for the construction and operation of a new sewage treatment plant and related infrastructure in Hidd for a period of 29 years and two months. Also, it subcontracted the operation of sewage treatment with Muharraq Wastewater Services Company WLL in 7 July 2011.

The operations of the sewage treatment plant commenced on 10 April 2014.