50 Causes of Cloudy Pool Water Pool Water Chemistry Inconsistent chlorine levels, below 1.0 ppm High combined chlorine levels, above 0.3 ppm High pH levels, rising above 7.6 High alkalinity levels, above 150 ppm High calcium levels, above 400 ppm High cyanuric acid levels, above 100 ppm Very high total dissolved solids, over 10000 ppm
