JHL Civil - Waste and Waste Water Infastructure

What is Recycled Water?

Recycled Water is former wastewater (sewage) that has been treated to remove solids and certain impurities. In Australia there are four classes of recycled water.

Class A is the highest quality recycled water and is produced in line with strict standards and guidelines developed by the Department of Human Services and the Environment Protection Authority Victoria (EPA).

Class A recycled water can be used for:

- garden watering
- closed system toilet flushing
- process/cooling water for industry
- fire protection stores and reticulation systems
- irrigation of parks and sportsgrounds
- water for contained wetlands or ornamental ponds
- food crops that are consumed raw or sold to consumers uncooked or processed
all of the uses listed for classes B, C and D

Class B
A secondary treatment process, combined with some pathogen reduction is used to produce Class B recycled water. With strict management practices it may be used for the following:

- irrigation of dairy cattle grazing fodder
- livestock drinking water (not including pigs)
- wash down water for dairy sheds and stockyards (not including milking equipment)
- urban (non-potable) uses with restricted public access
- closed industrial systems
all of the uses listed for classes C and D

Class C
A secondary treatment process combined with minor pathogen reduction is used to produce Class C recycled water. With strict management practices it may be used for the following:

- cooked/processed human food crops
- selected (raw/unprocessed) crops not directly exposed to recycled water (eg. apples)
- grazing/fodder for cattle, sheep, horses, goats etc.
- grazing for dairy cattle (subject to a five day withholding period after irrigation)
- urban (non-potable) uses with restricted public access
- closed industrial systems
all of the uses listed for Class D

Class D
A secondary treatment process is used to produce water of this quality. Class D recycled water may be used for the following uses:

- non food crops such as woodlots, turf growing and flowers

NB: Information above has been obtained from Melbourne Water site. For more information please visit Melbourne Water at www.melbournewater.com.au