Sewerage

This class includes: - operation of wastewater treatment facilities, for the reuse of e.g. agricultural, industrial, road cleaning or collected rain water, or for artificial recharge or augmentation of groundwater bodies - collection and transportation of wastewater from users, e.g. households or industrial units - collection and transportation of rain water - treatment of wastewater - maintenance and cleaning of sewers and drains, including sewer rodding This class also includes: - freeze drying of sewage sludge by wastewater treatment plants - emptying and cleaning of cesspools and septic tanks, sinks and pits from sewage - servicing of chemical toilets

This class excludes: - further treatment of sludge extracted from waste water, such as anaerobic digestion, aerobic treatment like composting, incineration with or without energy recovery, see 3830 - decontamination of surface water and groundwater at the place of pollution, see 3900 - construction or repair of sewer systems, see 4220 - cleaning and deblocking of drainpipes in buildings, see 4322 - rental and pumping of portable toilets, see 7730