Based upon Southlake's wholesale water purchase contract with the City of Fort Worth, the drought contingency standards that Southlake operates under are required by contract. Failure to follow these guidelines would be a breach of contract and may result in a loss in water service. Based upon recent efforts, all regional utilities are attempting to communicate the same message and as such are using the twice-per-week watering schedule if they purchase from the City of Fort Worth or Dallas Water Utilities. Most of the area cities, including Keller, Westlake, Trophy Club, and North Richland Hills all are served by the City of Fort Worth and follow the same watering restrictions.