If homeowners don't cut back on water Monday, the city will step in Tuesday.

Tulsa city leaders say Sunday's water use topped the trigger point. 

Water customers used more 198 million gallons of water, the highest single-day use so far this summer.

City leaders tell KRMG that, if water use today surpasses 197 million gallons, the mayor will, through an executive order, implement voluntary water use restrictions.

The city ordinance calls for voluntary water restrictions when water use tops 197 million gallons per day for two consecutive days.

Voluntary restrictions means customers are asked to limit outside watering to the hours between midnight and noon every other day, based on odd-even address numbers.

If water use tops 204 m.g.d. for two consecutive days, mandatory restrictions will be imposed.

If water use tops reaches 210 m.g.d. for two days, watering would be restricted to the hours between midnight and noon every other day and with the use of a hand-held hose only.

If use grows higher, then outside watering could be prohibited.

The trigger levels for restrictions are based on the capacity of Tulsa’s two water treatment plants to deliver water to customers.