These UV's are Class A validated and can be used as part of an End-Point Treatment System for Taumata Arowai's Acceptable Solutions. The UV sounds an alarm when the UV dosage drops below minimum level and is paired with a shut-off solenoid valve. These systems are certified by IAPMO for: (1) NSF/ANSI 55 Class A (2) NSF/ANSI 61 - Materials (3) NSF ANSI 372 Lead free (4) CSA-B483.1. Please contact us with your water test and we can assist you to come up with a solution including pre-treatment of the source water.