California Regulatory FAS-DPD Chlorine Testing Kit

The California Regulatory FAS-DPD Chlorine Testing Kit is a professional-grade pool water testing kit that meets California's regulatory requirements for aquatic facility water quality testing. FAS-DPD (Ferrous Ammonium Sulfate — DPD) testing provides precise free and combined chlorine measurements using a titration method that is more accurate and reliable than standard colorimetric DPD tablet testing — especially at high chlorine levels where standard tests saturate and become unreliable.

Required for California-licensed aquatic facilities. FAS-DPD testing is also recommended by the Pool & Hot Tub Alliance (PHTA) and MAHC guidelines for all professional pool operations.

Specifications

• Method: FAS-DPD titration
• Tests: Free chlorine and combined chlorine
• Regulatory: Meets California aquatic facility testing requirements
• More accurate than standard DPD at high chlorine concentrations