The pool pictured here is an example of a well lit pool and clear pool where both drains in the pool are clearly visible in the deepest part of the pool. According to Texas Department of Health and Safety Standards for Pools and Spas Section 265.203(b) the pool or spa shall be opened for use only if the bottom and /or main drains are clearly visible.
Pool operators and owners should always close down the pool if water conditions do not meet the standards because murky water pools create dangerous pool conditions. Code compliant water clarity is essential to allow swimmers to clearly see shallow water areas, other swimmers, drop offs, drains, and swimmers in need of rescue inside the pool. Operators who operate pools that do not meet proper water clarity standards can be closed down by the local government authorities and held legally responsible for drownings that occur in the pool as a result of unsafe water clarity conditions.