Water is one of our most precious resources. There is a finite supply of fresh water and unfortunately even when it rains, it doesn't mean that our dam and groundwater levels will increase unless the water actually falls in our catchment areas.
To ensure long term water security it's really important we all do our bit and become smarter with our water use.
Current water supply sources
Our main water supply sources are:
- Dams: We have four dams - Cressbrook, Cooby, Goombungee and Perseverance. More information about these can be found in the sliders below.
- Bores: We have 47 bore stations. Bores access groundwater and contribute approximately 20-30% of our water supply.
- Wivenhoe Dam pipeline: The pipeline from Wivenhoe Dam (SEQWater) provides security of supply when the rainfall in our dam catchments is insufficient to maintain supply to meet the region's growing needs. Once the capacity of Cressbrook dam falls below 40% we can start using water from Wivenhoe Dam.
Cooby Dam is the oldest of the city's three water supply dams, constructed during the period 1938-41. This dam is located about 17 km north of Toowoomba on Cooby Creek, a tributary of Condamine River.
- Total catchment area = 159 km2
- Storage area = 306 ha (full supply)
- Maximum available storage = 21,166 ML
- Dead storage = 1,462 ML
- Approximate evaporation = 5.2 mm/day
- Full water supply useable capacity = 19,703 ML
- Depth (overflow - dead water level) = 12.5 m
Old video footage of the Cooby Dam construction has recently been found. It's a fascinating peak into what life was like in the construction field 80 years ago.
Cressbrook Dam is the largest and newest of the city's three water supply dams. The dam is located on Cressbrook Creek approximately 10 km downstream of Perseverance Dam. The construction of the dam was commenced in 1981 and was completed in 1983.
- Total catchment area = 320 km2 (including Perseverance)
- Storage area = 517 ha (full supply)
- Maximum available storage = 81,842 ML
- Dead storage = 2,995 ML
- Approximate evaporation = 5.4 mm/day
- Full water supply useable capacity = 78,847 ML
- Depth (overflow - dead water level) = 34.0 m
Perseverance Dam is the second largest dam in terms of storage capacity, and the second oldest storage dam of the city's three water supply dams. Construction of this dam commenced in 1962 and was completed in 1965. This dam is located approximately 35 km northeast of Toowoomba on Perseverance Creek, which is a tributary of Cressbrook Creek.
- Total catchment area = 110 km2
- Storage area = 250 ha (full supply)
- Maximum available storage = 30,140 ML
- Dead storage = 3,207 ML
- Approximate evaporation = 4.1 mm/day
- Full water supply useable capacity = 26,893 ML
- Depth (overflow - dead water level) = 23.1 m
The Wivenhoe pipeline, operational in 2010, ensures that the local water infrastructure keeps pace with the needs of the community. When utilised, the water from Wivenhoe Dam is lifted more than 200 metres to Cressbrook Dam and then has to be lifted another 425 metres to be treated and ready for use in homes and businesses over 600 metres above its source.
The three dams (Cooby, Cressbrook and Perseverance) and bores in the Toowoomba Region have been able to adequately supply a population of up to 125 000, businesses and industries, but the continuing population growth may mean water will need to be drawn from Wivenhoe Dam in the future.
- Length: 38 kilometres from Wivenhoe Dam to Cressbrook Dam.
- Capacity to deliver water: 14,200 megalitres per year with an ultimate capacity of 18,000 megalitres per year.
- Pump stations: two pump stations at Wivenhoe Dam and an advanced electronic system to ensure remote operation.
- Built by: LinkWater Projects and fully operational by January 2010.
More information about the Wivenhoe pipeline can be found on our Wivenhoe pipeline FAQs page.
Water supply sources for your area
As you travel around the Toowoomba region, the water you use comes from many different sources and the water conservation levels will fluctuate depending on the water demand for the area.
For information about water pricing and charges refer to the Water rates & charges article.
- Water supplied by the Toowoomba bulk water supply of Cressbrook and Perseverance Dams.
- The pipeline from Wivenhoe Dam provides security of supply. Once the capacity of Cressbrook dam falls below 40% we can start using water from Wivenhoe Dam.
- Water restrictions apply.
Future water sources
Information about the recent water investigations can be found on our Wivenhoe pipeline FAQs page.