Residents of Northeast Tarrant County cities may be asked to follow watering restrictions later this month, Mark Olson of the Tarrant Regional Water District said.

Reservoir levels are expected to drop to 75 percent in a couple of weeks, triggering Stage 1 restrictions, said Olson, conservation and creative manager at TRWD, which supplies 98 percent of the water to Tarrant County.

Southlake and Westlake are customers of the TRWD through the City of Fort Worth. Grapevine and Colleyville are served by the TRWD through the Trinity River Authority.

Basically, the restrictions reduce watering to twice a week.

"Even in the heat of the summer, our lawns will survive on a twice per week or less schedule," Olson said. "We just need to get people in tune with spreading their watering out over the course of a week."

The city of Colleyville also is reminding water customers that some of them will see new, tiered water rates reflected in their bills this month.

Put simply, customers who use less water are charged a lower rate. Those who use 20,000 gallons a month or less will not see a change in their rate. Details about the tiered rates and a water calculator are available at www.colleyville.com.

For more information about how to save water, visit the TRWD website at www.trwd.com and The Lawn Whisperer on Facebook.