Includes firms specialized in Water resource treatment and water infrastructure systems efficiency enhancement, including reservoirs, khours, wadis, amenity features, pump stations, water wells and pipe infrastructure, by implementing the techniques of magnetizing, aeration, circulation, filtration and coagulation.

Includes natural gas production plants and distribution through networks for domestic, industrial and commercial consumption, distribution of gas cylinders by vehicles for domestic consumption is classified under Class 5141 - Wholesale of solid, liquid and gaseous fuels.

Includes producing fuel from waste by mixing municipal and agricultural waste and the dewatered sludge , also, from inorganic waste ,such as tires, plastic…etc, the process involves series of thermal processes create liquid fuels, as well as Biomass briquettes that can be incinerated to generate electricity.

Includes firms engaged in treating potable water impurities purifying, sea-water desalination, as well as adding anti-stagnation or teeth anti-decay substances, it also includes bottling and marketing.