TAWZEA participates in four operational Saudi independent sewage treatment plants with a combined initial capacity of approximately 540,000 cubic meters per day. Its Taif, Madinah, Buraydah and Tabuk projects include 87 km of pipelines delivering treated wastewater for reuse. Their biogas and solar systems generate approximately 37.1 GWh of energy annually, avoiding an estimated 26,295 tonnes of CO₂ emissions. Across its industrial-city operations, TAWZEA reports an average non-revenue water rate of about 2%. Halawani has led the company as CEO since 2013. He is also on the board of the International Desalination and Reuse Association (IDRA) among others.