“(5) water supply as far as the following equipment is concerned:(a) water collection works, including water intakes;
(b) supply lines;
(c) filtration plants;
(d) reservoirs;
(e) chlorination stations; and
(f) any other equipment on the list drawn up under section 39;
“(“5.1) water purification as far as the following equipment is concerned:(a) treatment plants;
(b) outfalls;
(c) pumping or lift stations that ensure gravity flow to a treatment plant; and
(d) any other equipment on the list drawn up under section 39;”;