Table 1 The different cities and rural areas and the jobs and tasks measured.

Capital

2 big plants, pump stations, sewer network

Working in big plant, Working with sewer network, Working at pump stations

Flushing and cleaning, maintenance, Inspection.

City 1

2 big plants, pump stations, sewer network, cesspools

Working in big plant, Working with sewer network, Working at pump stations, Collecting sewage from cesspools

Flushing and cleaning, maintenance, sucking sewage from cesspools

City 2

1 big plant, pump stations,1 small plant, cesspools

Working in big plant, Collecting sewage from cesspools, Working in small rural plants including sewer network and pump stations

Inspection, flushing and cleaning, maintenance, sucking sewage from cesspools

Rural 1

1 small plant, pump stations, sewer network

Working in small rural plants including sewer network and pump stations

Flushing and cleaning, maintenance.

Rural 2

1 small plant, pump stations, sewer network

Working in small rural plants including sewer network and pump stations

Flushing and cleaning, maintenance.

Rural 3

1 small plant, pump station, sewer network, cesspools

Collecting sewage from cesspools, Working in small rural plants including sewer network and pump stations

Flushing and cleaning, maintenance, sucking sewage from cesspools