Article 9 3

(a)

defining and implementing control measures for the prevention and mitigation of the risks identified in the supply system that could compromise the quality of water intended for human consumption;

(b)

defining and implementing control measures in the supply system in addition to the measures foreseen or taken in accordance with Article 8(4) of this Directive or Article 11(3) of Directive 2000/60/EC for the mitigation of risks coming from the catchment areas for abstraction points that could compromise the quality of water intended for human consumption;

(c)

implementing a supply-specific operational monitoring programme in accordance with Article 13;

(d)

ensuring that, where disinfection forms part of the preparation or distribution of water intended for human consumption, the efficiency of the disinfection applied is validated, that any contamination from disinfection by-products is kept as low as possible without compromising the disinfection, that any contamination from treatment chemicals is kept as low as possible and that any substances remaining in the water do not compromise the fulfillment of the general obligations set out in Article 4;

(e)

verifying that materials, treatment chemicals and filter media that come into contact with water intended for human consumption used in the supply system comply with Articles 11 and 12.