Which of the following is an acceptable water supply for a sprinkler system?

The selection of municipal water supply or on-site water tanks as an acceptable water supply for a sprinkler system is grounded in the reliability and consistency of these sources. Municipal water supplies are often designed with sufficient pressure and flow capacity to meet fire protection demands, ensuring that the sprinkler system can operate effectively during an emergency. On-site water tanks can also be engineered to provide the necessary water supply, particularly in areas where municipal sources may be limited or unreliable. These tanks can include storage capacities tailored to the specific needs of the building and its fire protection system.

In contrast, while rainwater harvesting can be beneficial for other applications, it may not always provide a consistent or adequate supply of water for fire suppression purposes. Swimming pool water may not meet the required quality standards for use in a sprinkler system and could also suffer from insufficient volume for firefighting needs. Water from nearby lakes or rivers might lead to issues related to water quality, safety, and environmental regulations, as it may not always be suitable or reliable for effective fire control. Therefore, the answer points to the importance of using water supplies that are designed and maintained in accordance with fire protection standards.