Treatments included irrigation at four intervals: 1) three times per week (Monday, Wednesday, Friday); 2) two times per week (Monday and Friday); 3) once per week (Friday); and 4) biweekly (every other Monday).  This field project was conducted in a fully automated, mobile rainout shelter (10.7 m x 18.3 m) at Rutgers University Horticultural Farm II, allowing for strict control of irrigation frequency and amount.  CWSI values were calculated using air and surface canopy temperature measurements and is expressed as the ratio of actual canopy and air temperature difference to the maximum canopy and air temperature difference of a plant.  Results demonstrate that CWSI values below 0.40 result in acceptable turf quality.  Additionally, irrigating at 100% ET, three times a week may not be necessary to sustain plant growth and physiological processes, and that this can be dependent on time of year.  Generally, irrigating once or twice a week and replacing 100% of ET was adequate to maintain acceptable turf quality during summer months.  Watering at the 14-day interval was not sufficient to maintain acceptable turf quality.