These are the ways to identify what’s gone wrong with the water in your pool and fix the cloudiness quickly. 1. Remedy low chlorine levels Low chlorine levels might be the cause of a cloudy pool.

As Meece told us, "Cloudy pool water is most commonly caused by an imbalance in the pool's chemistry, low chlorine levels, improper pH, or high levels of contaminants like dirt, algae, or oils." ...

That's why the CDC and others urge pool owners and managers to test chlorine and pH levels all the time — they can change day to day based on pool usage.