[Bring_Back_Shantz]

Originally Posted by Wormius

Got our Enmax bill the other day and wanted to check water usage, we’re basically flat at 12m^3 per month, except July last year where it was closer to 20m^3 for that month. That’s for a family of 4 that includes one child that takes abnormally long showers.

Keep in mind (I'm pretty sure this is the case), that often times your bill is an estimate.
They'll keep the number the same until they do an actual meter reading then update the usage in the next bill.
So chances are last year you were being billed for 11 m3/month, and when they did a reading in July they saw you were actually using 12, so that July bill includes the extra 1m3/month for however months, and they tack it on to July, so July looks abnormally high.