Public Health Ontario Chlorine Dilution Calculator

How to Use This Calculator

To calculate the proper chlorine dilution for your application:

1. Select the type of chlorine solution you're using (liquid or granular)
2. Enter the desired chlorine concentration in parts per million (ppm)
3. Specify the volume of water you need to treat (in liters)
4. Click "Calculate" to get your dilution ratio

The calculator will show you how much chlorine solution to add to your water to achieve the desired concentration. The result will include the amount of chlorine to add and the final concentration.

Formula and Assumptions

The calculator uses the following formula for chlorine dilution:

Where:

• Desired concentration is in parts per million (ppm)
• Volume of water is in liters
• The result is in grams of chlorine solution to add

Assumptions:

• Standard chlorine solution concentration is 12.5% active chlorine
• Water density is 1 gram per milliliter
• Calculations are based on Ontario's public health guidelines

Worked Examples

Example 1: Disinfecting 100 liters of water to 1 ppm

Using the calculator:

1. Select "Liquid chlorine solution"
2. Enter 1 for desired concentration
3. Enter 100 for volume of water
4. Click "Calculate"

The calculator shows you need to add 0.0125 grams of chlorine solution to achieve 1 ppm in 100 liters of water.

Example 2: Using granular chlorine for 50 liters of water

Using the calculator:

1. Select "Granular chlorine"
2. Enter 5 for desired concentration
3. Enter 50 for volume of water
4. Click "Calculate"

The calculator shows you need to add 0.025 grams of granular chlorine to achieve 5 ppm in 50 liters of water.

Safety Guidelines

When using chlorine for disinfection, follow these safety precautions:

• Always wear appropriate personal protective equipment (PPE)
• Work in a well-ventilated area
• Follow proper handling procedures for chlorine solutions
• Dispose of chlorine waste properly according to local regulations
• Never mix chlorine with other chemicals without proper testing

For more detailed safety information, consult the Ontario Public Health Guidelines for Chlorine Use.