Unseen organics from sunscreen to body oils can undermine UV disinfection, drive up chlorine use, and trigger DBP (THM/HAA) formation. Real-time UV254 UVTÂ (Ultraviolet Transmittance) and UVAÂ (UV Absorbance) monitoring delivers instant pool water quality data with no reagents or lab trips so operators optimize UV dose, cut chemicals, and safeguard swimmer health.