Bac­te­rial growth in lakes


Southern Gazette (Victoria Park) - - News - Bron­wyn Dono­van

A PO­TEN­TIALLY harm­ful bac­te­ria has been found in Lake Hurling­ham and Neil McDougall Lake.

Water test­ing iden­ti­fied two species of cyanobac­te­ria, a blue-green al­gae that may have ap­peared due to the re­cent rains and high nu­tri­ent lev­els in water.

The City of South Perth en­vi­ron­men­tal man­age­ment team has warned di­rect con­tact with the water should be avoided as there could be harm­ful ef­fects for hu­mans or an­i­mals.

Mayor Sue Do­herty said the City was mon­i­tor­ing the lakes fort­nightly by tak­ing sam­ples and hold­ing vis­ual assess­ment for al­gal scum. The as­sess­ments will con­tinue un­til two con­sec­u­tive all­clear re­sults were achieved.

“Storm water runoff con­trib­utes to high nu­tri­ent load in both Lake Hurling­ham and Neil McDougall Lake,” Mrs Do­herty said.

“Ev­ery­one can work to­ward re­duc­ing ex­cess nu­tri­ents and pol­lu­tion from en­ter­ing water bod­ies by us­ing fer­tilis­ers in mod­er­a­tion and fol­low­ing the in­struc­tions care­fully or seek­ing al­ter­na­tives, pick­ing up an­i­mal drop­pings from lawns and parks and plac­ing them in bins pro­vided, plac­ing un­wanted gar­den waste in a green waste bin, wash­ing cars, boats or car­a­vans on lawns as op­posed to on the street or in the drive­way and use phos­pho­rus-free detergents.”

The City has been reveg­e­tat­ing Lake Hurling­ham’s low em­bank­ment ar­eas with nu­tri­ent-strip­ping plant species.

It is also de­vel­op­ing a con­sol­i­dated stormwa­ter man­age­ment plan that aims to ad­dress water qual­ity in the catch­ment area.

It is ex­pected to be com­pleted in April.

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