GWMWater

Recycled water

About recycled water

Recycled water is treated wastewater available for reuse from our wastewater treatment plants. This water comes from everyday household activities such as cooking, cleaning, bathing, and flushing toilets, and from commercial businesses and community facilities. This wastewater is processed at sewage treatment plants to meet strict government standards, making it safe for approved uses like irrigation and landscaping.

It's an important resource for GWMWater and the region. It has many benefits, such as:

  • helping to maintain community resources such as sports ovals, race courses and golf courses

  • encouraging regional growth by supporting community recreational spaces and local industry, such as vineyards

  • reducing the need for drinking water or raw water in irrigation

  • providing potable water substitution options

  • reducing environmental impacts from traditional river discharges

Nineteen of our 29 wastewater treatment plants are currently supplying recycled water across the region to participating customers.

About Class C recycled water

We produce and monitor recycled water to meet strict quality guidelines set by the Victorian State Government and Environmental Protection Authority (EPA) Victoria. This water is commonly used for irrigating vineyards, golf courses, racecourses, public parks and other open spaces. We supply Class C recycled water to a range of customers across our service region in the following towns:

Towns

Towns

Towns

Ararat

Birchip

Charlton

Dimboola

Edenhope

Great Western

Halls Gap

Horsham

Kaniva

Murtoa

Nhill

Ouyen

Rupanyup

Sea Lake

St Arnaud

Stawell

Warracknabeal

Willaura

Wycheproof

Frequently asked questions

How is recycled water treated?

Our recycled water is treated to meet fit for purpose requirements according to EPA Victoria's guidelines. Under the guidelines, this water is used for:

  • urban areas that have restricted public access during irrigation

  • agricultural uses for vineyards

  • agricultural uses for grazing or as fodder for livestock

  • industrial uses for systems with no potential worker exposure

Recycled water is often stored in the winter and then used during the dry summer and autumn months when other water sources are scarce.

Why use recycled water?

Using recycled water offers several important benefits:

Preserves Fresh Water Supplies

It helps conserve high-quality drinking water for essential uses like hydration, cooking, and hygiene.

Protects the Environment

By maximising reuse of treated wastewater, recycled water reduces the likelihood of high‑volume releases to rivers. Occasional discharges may occur only during exceptional rainfall events, and these are carefully managed since we are not licensed for routine release.

Cost-Effective Solution

Where available, recycled water is more affordable than fresh water, making it a smart choice for irrigation and other non-potable uses.

Is recycled water safe?

Yes—when used correctly, recycled water is safe for all approved applications. It’s important that users follow the appropriate safety measures and usage guidelines to ensure safe handling.

To maintain safety and compliance:

  • Customers must use recycled water in line with the terms of their Recycled Water Supply Agreement, User Site Management Plan (USMP) or Health and Environment Management Plan (HEMP).

  • Signage at publicly accessible sites to identify where recycled water is used.

  • Fencing or other physical barriers should be used to restrict access where necessary.

  • Livestock must be prevented from grazing on areas irrigated with Class C recycled water until a safe withholding period has passed.

  • Watering points for livestock must be separate from recycled water sources to avoid ingestion.

These measures are essential to protect public health and animal welfare, and to comply with the conditions outlined in your Recycled Water Supply Agreement, User Site Management Plan (USMP), or Health and Environment Management Plan (HEMP) to ensure safe and compliant use.

What does recycled water cost?

Recycled water is a cost-effective option for non-potable uses, and its pricing is regulated by the Essential Services Commission (ESC). The ESC sets common pricing principles to ensure consistency across Victorian water corporations.

The recycled water tariff reflects the cost of using Class C recycled water. It does not include expenses related to transport, distribution, or any additional treatment beyond the Class C standard. Tariffs are reviewed annually and adjusted in line with the Consumer Price Index (CPI).

GWMWater also offers industry-specific discounts for eligible recycled water users.

For more information, please call us on 1300 659 961 or refer to our tariffs and charges

Interested in recycled water for your property?

GWMWater currently services a number of towns in the region with recycled water, but there are limitations to our supply capabilities. If you're interested in recycled water for your business or organisation, contact us to find out more.

What are the approved uses of Class C recycled water?

Class C recycled water is suitable for a range of non-potable applicationsand can be safely used when managed appropriately.

Approved Uses

Irrigation of:

  • Public open spaces with controlled public access e.g. municipal parks, gardens, sport ovals, golf courses, and racecourses. These sites are to be clearly signposted and access managed to avoid contact with recycled water, particularly during and immediately after irrigation when surfaces are not dry.

  • Human food crops which are cooked/processed before consumption such as vineyards and olive plantations.

  • Pastures for beef cattle, sheep, horses and goats grazing

  • Non-food crops, woodlots, turf, flowers, etc.

  • Dust suppression

  • Industrial wash-down (non-food contact surfaces)

Non-Approved Uses

  • Drinking, including livestock

  • Uses inside the home

  • Cooking

  • Personal hygiene (e.g. showers, handwashing, etc.)

  • Filling swimming pools or spas

  • Swimming, bathing, or wash-down water

  • Irrigation of edible crops consumed raw

  • Irrigating public open space with unrestricted access

  • Irrigating pasture for dairy cattle grazing/fodder

What are the guidelines for using recycled water?

In Victoria, the use of recycled water is regulated by the Environment Protection Authority (EPA) Victoria and must comply with established guidelines. These are designed to work alongside the Australian Guidelines for Water Recycling, which serve as the national reference for the safe supply, use, and management of recycled water schemes.

The guidelines outline the minimum water quality treatment objectives required for different classes of recycled water. We supply Class C recycled water, which meets the following standards:

Class

Water quality objectives

C

< 1000 E. coli organisms/100 mL

< 20 mg/L Biochemical Oxygen Demand (BOD)

< 30 mg/L Suspended Solids (SS)

pH range: 6–9

These standards ensure recycled water is safe for approved uses such as irrigation of public spaces, vineyards, and recreational areas.

What are the site access guidelines for Class C recycled water?

To ensure safety and compliance with EPA Victoria regulations, access to sites using Class C recycled water must be restricted as follows:

Access

Drinking water

Direct grazing (pasture & fodder crops)

Harvested fodder (silage & hay)

Grains* & human food**

Withholding period before getting access, grazing & harvesting fodder

General public

No

N/A

N/A

Yes**

4 hours or until dry

Sheep

No

Yes

Yes

Yes

4 hours or until dry

Goats

No

Yes

Yes

Yes

4 hours or until dry

Horses

No

Yes

Yes

Yes

4 hours or until dry

Cattle (beef)

No

Yes

Yes

Yes

4 hours or until dry (with helminth control***)

Cattle (dairy)

No

Yes

Yes

Yes

5 days (with helminth control)

Pigs

No

No

No

No

Not to be exposed to recycled water

Symbol

Legend for above table

*

Grains refer to the dry, harvested grain – not grain crop residue with should be treated as direct grazing or harvested fodder.

**

Human food should not be directly exposed to recycled water and should be cooked or processed be before consuming.

***

Helminth control is 25 days of lagoon detention or an equivalent filtration process such as sand or membrane filtration.

Crop and produce controls

To ensure safe and responsible use of Class C recycled water, the following controls must be applied to all irrigated crops:

Crop category

Irrigation methods

Control measurements

Non-food crops – crops not grown for consumption, e.g. woodlots, turf, flowers

Unrestricted

4 hours withholding period or until dry before getting access

Raw human food crops exposed to recycled water

N/A

Cannot irrigate with Class C water

Human food crops grown over 1 metre above the ground and eaten raw (but edible parts not exposed to recycled water), e.g. apples, pears, apricots, table grapes, olives

Flood, furrow, drip, sub-surface

  • No food contact with recycled water

  • Dropped product not to be harvested

Food crops which are skinned, peeled or shelled before consumption, for example lemons, limes, nuts, watermelons, rockmelons

Flood, furrow, drip, sub-surface

  • No food contact with recycled water

  • Dropped product not to be harvested

  • Not to be wet from recycled water when harvested

Food crops that are to be cooked (>70°C for 2 minutes) or processed before sale to consumers, e.g. wheat, wine grapes

Unrestricted

Unrestricted

Crop information source: Publication 1911-Technical information for the Victorian guideline for water recycling