1
Chemicals used in treatments carried out at treatment stations for solid and liquid waste and/or at purification plants for urban or industrial wastewater
9
Computer equipment, software, databases and computers for evaluating, managing and monitoring the quality of water for human consumption; computer equipment, software, databases and computers for evaluating, managing and monitoring the quality of treated wastewater before it is discharged into the environment or recycled
11
Apparatus and installations for water supply, apparatus and installations for converting surface water and drilling water into drinking water, apparatus and installations for purifying domestic and industrial waste water, water-supply apparatus and installations
37
Maintenance and servicing of installations for the treatment of urban and industrial water or rain water; construction of buildings, plumbing and public works, maintenance or cleaning of buildings, premises, soil; after-sales services (repairs and maintenance) of apparatus and installations for the treatment, purification, sterilisation and regeneration of liquids of all kinds
42
Surveying, scientific and technical consultancy relating to water and waste liquid treatment, construction drafting, engineering work (except construction), hydrological prospecting, drilling, materials testing, terrain studies (surveying) relating to problems with water supply and resources, water purification and the discharge of water into the environment, laboratories for the analysis of water and waste liquids, computer programming services, professional and technical consultancy relating to water and software in the field of water
45
Safety services for the protection of property and individuals in the event of deterioration in water quality; safety services for the protection of the residents on riverbanks near treatment plants for industrial and domestic water and waste