How to Interpret Online Turbidity Meter Results

How to Interpret Online Turbidity Meter Results

When monitoring water quality, it is essential to use reliable and accurate instruments to measure turbidity. Turbidity is the cloudiness of water caused by suspended solids. A high level of turbidity can increase the risk of waterborne diseases and make it difficult for aquatic organisms to survive. An online turbidity meter is a tool that can continuously monitor the turbidity of water. However, interpreting the results of such a meter can be challenging without a proper understanding. In this article, we will explain how to interpret online turbidity meter results and what they mean.

What is Turbidity?

Turbidity is the measure of the cloudiness of water caused by suspended particles. These particles can be organic or inorganic, such as bacteria, clay, silt, and algae. Turbidity is measured in nephelometric turbidity units (NTU) and is an essential parameter in determining water quality. High turbidity can interfere with disinfection processes, aesthetics, and aquatic life.

How Does an Online Turbidity Meter Work?

An online turbidity meter is a device that continuously monitors the turbidity of water. It measures the amount of light scattered by particles in water. The device has a light source and a detector with two sensors, one for transmitting and one for receiving light. As the light passes through the water, particles scatter some of the light, and the detector measures the amount of scattered light. The more scattered light detected, the higher the turbidity.

How to Interpret Turbidity Meter Readings?

Interpreting an online turbidity meter reading is essential to determine the quality of water. The following are five steps to interpret turbidity meter readings.

1. Know the Units

Turbidity is measured in nephelometric turbidity units (NTU). NTU is the standard unit of turbidity and is used to compare the turbidity level of water samples.

2. Understand the Threshold Value

The maximum allowable limit for turbidity levels in drinking water is 1 NTU. However, the limit may vary for different applications, such as swimming pools or industrial processes. It's essential to understand the threshold value of turbidity for a specific application. Exceeding the threshold value may pose a risk to health and environment.

3. Note the Trend and Variations

Tracking the trend and variations in turbidity readings over time is essential. A sudden spike in turbidity levels may indicate a water quality problem, such as a wastewater overflow or a heavy rain event. On the other hand, a consistent increase in turbidity may indicate a long-term problem, such as erosion or sediment accumulation.

4. Examine the Context

Interpreting turbidity meter readings requires context. Knowing the source of water and the surrounding environment can help understand the turbidity levels. For instance, a river with high turbidity levels may be due to natural processes, such as runoff from a forested area, while a sudden increase in turbidity levels in a drinking water treatment plant may indicate an operational issue.

5. Evaluate the Risks

Evaluating the risks associated with high turbidity levels is essential. High turbidity can interfere with disinfection processes, leading to the presence of pathogens in drinking water. It can also affect the aesthetic quality of water, reducing its desirability. Turbidity can also impact the aquatic environment, affecting the survival and reproduction of aquatic organisms.

Conclusion

In conclusion, interpreting online turbidity meter results is essential to determine the quality of water. By understanding the units, threshold value, trends and variations, context, and risks associated with turbidity levels, users can monitor and manage water quality effectively. A reliable and accurate online turbidity meter can help identify potential problems promptly, allowing for prompt action to protect human health and the environment.