Operation of sewer systems or wastewater treatment facilities
collecting and transporting of human or industrial wastewater from one or several users, as well as rain water by means of sewerage networks, collectors, tanks and other means of transport (sewage vehicles etc) - emptying and cleaning of cesspools and septic tanks, sinks and pits from sewage; servicing of chemical toilets
Tratarea apelor uzate (inclusiv ape uzate menajere și industriale, apă provenită de la piscine etc.) prin procese fizice, chimice și biologice precum diluare, decantare, filtrare, sedimentare etc.
maintenance and cleaning of sewers and drains, including sewer rodding
This class excludes:
Decontamination of surface and groundwater at the pollution site, see: CAEN 3900
cleaning and deblocking of drainpipes in buildings, see CAEN 4322