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Water Monitoring Testing

What is Percent Saturation?

Percent Saturation (% Saturation) is the amount of Dissolved Oxygen (DO) in the water sample compared to the maximum amount that could be present at the same temperature. As temperature increases, the concentration at 100% saturation decreases. Three factors affect the percent saturation (the highest DO level possible even in well-aerated water):

  1. Salinity: Fresh water can hold more oxygen that salt water.
  2. Temperature: Cold water can hold more oxygen than warm water.
  3. Atmospheric Pressure (Altitude): The greater the atmospheric pressure the more oxygen the water will hold.

Living organisms require specific minimum levels of dissolved oxygen to survive. Values less than 60% or over 125% are undesirable. DO percent saturation values in the range of 80-120% are desirable.

% Saturation Test

What You'll Need:

% Saturation Test Procedure:

  1. Compare the temperature of your water sample with the table on page 13 of the booklet from your kit.
  2. Then, compare the Dissolved Oxygen result of your water sample with the ones found in the table on page 13.
  3. Compare the color of the sample to the Dissolved Oxygen color chart from your kit.
  4. The % saturation is where the temperature row and the Dissolved Oxygen column intersect. For example: if your water sample temperature is 16 degree C and the Dissolved Oxygen result is 4 ppm, you will see that the intersecting number is 41. So, the % Saturation of your sample would be 41. This would be the number you record on your data sheet.

Locating % saturation by intersecting the temperature results with the dissolved oxygen results on table found on page 13 of the instruction booklet.
Locating % saturation by intersecting the temperature results with the dissolved oxygen results on table found on page 13 of the instruction booklet.

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This full-featured set of instructions took an extremely technical and difficult-to-understand set of instructions and broke them down into layman terms that school teachers were able to understand. As a result two foreign schools in Uzbekistan and Warsaw, Poland were able to participate in the World Water Monitoring Day event. These instructions also served as the replacement for the on-site training that some of the local teachers missed.

If you need help writing or editing instruction content, contact me today. I'm also really good at testing the accuracy of procedures. I will actually go through the process of whatever the instructions cover and ask questions if I come across something unclear or inaccurate. Then, I rewrite what's unclear or inaccurate. I also include applicable computer screen shots for software instructions and other illustrations to help the user better understand the task they are performing.