Final answer:
Hydrants are indeed typically flushed by the water company to ensure proper functioning and maintain water quality.
Step-by-step explanation:
The statement that hydrants are usually flushed by the water company is true. Fire hydrants are flushed to ensure they work properly and to maintain water quality. Flushing clears out sediments and deposits that accumulate in the pipes, which can affect water quality and flow. This maintenance is typically conducted by municipal water departments or water utility companies. It is an essential process for fire safety and public health.