Overall reservoir levels across the region had increased to 65.3% – up from 60.6% the previous week, the company said.
Since July, more than five million householders in Yorkshire have been barred from using hosepipes for activities such as watering the garden, washing the car or cleaning windows.
Mr Kaye said water levels were expected to remain below average “for some months to come given the extent of the dry, hot weather in the first half of the year”.
“Until we have sufficient recovery across all reservoirs, the hosepipe restrictions will remain in place,” he added.
According to Yorkshire Water, the most recent levels are:
Meanwhile, groundwater levels in the Hull aquifer remain lower than normal for this time of year at 38.2%.
