The answer to 'why is my toilet low water pressure' is that there are several common causes, including a clogged or partially blocked toilet, a faulty fill valve, or a problem with the water supply line. Low water pressure can also be caused by issues with the home's main water supply.
If the toilet is flushing slowly or not completely, this is a clear sign of low water pressure. You may also notice the tank taking a long time to refill after a flush. In some cases, the water level in the tank may be consistently low.