(1) (a) How many complaints has her department received from residents in the Ekhurhuleni Metropolitan Municipality with regard to the (i) sludge provided by the municipality to farmers in the Kempton Park area and (ii) resultant odour and (b) what action has her department taken to address these complaints; (2) what classification of sludge in terms of the National Water Act, Act 36 of 1998 is being utilised on the Kempton Park farms; (3) whether her department has done any tests or studies to determine whether the sludge poses any safety hazards to residents of the area?