Sizing your Chlorination System

At Affordablewater.us, we offer 3 sizes of chlorination systems.  When choosing a chlorination system, sizing is crucial.  

The minimum contact (retention) time for most common oxidants is 20 minutes to eliminate contaminants, including pathogenic bacteria and parasites.  The formula is essentially: Volume = Flow Rate x Contact Time.  This will help you determine the size retention tank (120 gallons vs 80 gallons) your system needs.  

Different oxidants require different concentrations to effectively treat contaminants.

The tables below show the chemical requirements for oxidation of various contaminants with 20 minute (Iron/Manganese Oxidation) or 30 minute (H2S) contact times.

Note - in order to achieve these concentrations, you will also need to know the solution strength (straight 5.25% bleach is 52,500 ppm) of the oxidant you are using, as well as your well flow rate.  

To find your needed feed pump output in GPD, you simply take your Well Flow Rate (GPM) x Required Oxidant Dosage (in PPM...see above tables) x 1440 / Solution Strength (in PPM).

Still have questions?  Give one of our Certified Water Specialists a call!