Colour Test. 1. Label the test tubes; Control, Canadian Guideline, and Local community sample. 2. Pour the 50 mL of Canadian Guideline Limit Sample into.

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Presentation transcript:

Colour Test

1. Label the test tubes; Control, Canadian Guideline, and Local community sample. 2. Pour the 50 mL of Canadian Guideline Limit Sample into the Canadian Guideline test tube.

3. Fill the Control test tube with the deionized water to the same level as the Canadian Guideline test tube. 4. Fill the Sample test tube with Local community treated water to the same level as the Canadian Guideline test tube.

5. Hold the Local community treated water test tube side by side with the Control and Canadian Guideline tubes over a white piece of paper. 6. View the test tubes from above: Is the colour of the Sample lighter or darker than the colour of the Canadian Guideline tube? 7. Record the results. Results: If the water sample has a colour lighter or equal to that of the Canadian Guideline then it passes the Guidelines for Canadian Drinking Water Quality guideline for colour. If the water sample is darker in colour than that of the Canadian Guideline, it fails the Canadian Drinking Water Guideline of 15 TCU (True Colour Units).