Wimmera River diverters (below Glenorchy weir)
The trigger which allows Wimmera River surface water licence holders, below Glenorchy Weir, to access their water under their irrigation or commercial licence has not been met.
As of 1 July 2025, Wimmera River surface water licence holders are not permitted to irrigate during the 2025/26 year.
Wimmera River trigger rules
Licenced irrigators may take 50% of their licenced volume through an approved meter when: A minimum of 8,000 ML has flowed through the Glenorchy gauging station between May and August of the calendar year.
Licenced irrigators may take 100% of their licenced volume through an approved meter when: a minimum of 10,000 ML has flowed through the Glenorchy gauging station at any time during the calendar year.
Avoca River diverters (below Charlton weir)
The trigger which allows Avoca River surface water licence holders, downstream of Charlton Weir, to access water under their irrigation or commercial licence has not been met.
As of 1 July 2025, Avoca River diverters are not permitted to irrigate during the 2025/26 year.
Avoca River trigger rules
The rules to determine if a 'take and use' allocation can be allowed are:
A flow rate of at least 100 ML/day must be recorded at the Quambatook South flow gauge, and river flow must have reached Lake Bael Bael, before water can be extracted for irrigation or commercial purposes. Once water has reached Lake Bael Bael and there is adequate flow in the river to allow irrigation, diversions can commence.
Further information...More about 'taking and using' surface water Depending where you’re located in our region, you may be eligible to apply to harvest and use surface rainfall runoff, including from streams, rivers, creeks and catchment dams. |
We host two Customer and Stakeholder Workshops each year to engage a broad range of stakeholders in the Grampians, Wimmera and Mallee about issues affecting our work and our future direction.
All are welcome!
To join our Customer and Stakeholder Workshop mailing list please email
VCE Awards
GWMWater are proud to donate sponsorship awards recognising high achieving VCE students at local secondary colleges.
As part of our commitment to supporting students excelling in science or innovation, we provide an award certificate and book voucher to secondary schools in our service area.
VCE Student Grants
A GWMWater initiative aimed at supporting the next generation of science and innovation leaders!
As part of our commitment to investing in the community and future workforce, the grant provides up to $1,000 to assist VCE students with the cost of university books.
Each year, we are proud to offer this sponsorship to five exceptional students who demonstrate a passion for science and innovation.
Come and say hi to our GWMWater staff at the Careers Expo!
The Western Victorian Careers Expo is country Victoria’s largest careers expo!
Since its inception in 1986, this premier regional event has provided a one-stop-shop of vocational information to Western Victorian students, school leavers, job seekers, career changers, those returning to work and people considering further study or training.
The expo traditionally operates on the last Tuesday of Victorian school term two.
Visit a water treatment or wastewater treatment plant
Have you ever wondered how water gets from the river to your tap?
Or what happens to the water after it goes down your drain?
Take a tour of one of our water treatment or wastewater treatment plants and find out.
We run tours at several sites across our service region.
Our tours of these sites are suitable for:
- secondary school students up to year 12
- community groups.
Tours are free.
You need to book at least 3 weeks’ in advance.
Tours generally run for 45 minutes to one hour:
Tours are led by a Treatment Plant Operator.
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