Ask who holds Alberta's water and you can get two opposite answers from the same dataset, depending on how you count.
Count licences, and oil and gas dominates. Of about 171,600 active diversion records in the provincial licence export, roughly 77% classify as energy-sector. Add up the water those licences are allowed to divert instead, and the picture inverts. Among the licences that report a volume, irrigation holds about 44% of the reported allocation, while oil and gas holds about 14%.
Both numbers are correct. They answer different questions.
The provincial export records each diversion as a row. Many energy diversions are temporary, short-duration takes tied to construction, and a large share carry no volume figure at all. About 81% of active rows carry no numeric volume, so any honest volume figure is calculated on the remaining 19%.
The export has no Oil and Gas purpose field. Energy operators appear mostly under a Commercial label. A filter that trusts the purpose label will undercount energy badly.
When you sum the licensed volume where it is reported, irrigation comes out on top at about 44% of provincial allocation among licences that report a volume, close to 4.3 billion cubic metres a year. Municipal sits near 14%, oil and gas near 14%.
The practical lesson: decide whether your exhibit counts licences or sums water, label it plainly, and state the exclusion of volume-blank rows.
A licence is permission to divert, and it does not measure what gets consumed. The energy regulator reports sector-wide aggregates that should never be applied to a single licence or to irrigation and municipal holders.
Three numbers, three questions: how many diversion points, how much water is allocated, how much is actually used.
Alberta's southern river basins closed to new surface water licences in 2006 and 2007. Since then, new consumptive allocation has come through transfer between existing holders. In March 2026, Bill 7 brought the first major Water Act amendment in more than 25 years, including a requirement that transfer applicants disclose the price paid.
Water Register reads the open licence data alongside transfer case archives and classifies rows by holder and sub-classification rather than the purpose label alone.
Water Register restates publicly available information in a reference format. It is not legal, engineering, or regulatory advice. Always confirm an authorization in the Environmental Records Viewer before a filing or a transaction.