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How to Interpret Water Quality Analyzer Results

by:BOQU     2023-06-03

As the demand for clean and safe water continues to increase, water quality analyzers have become essential tools for ensuring that drinking water is free from contaminants and safe for human consumption. A water quality analyzer provides detailed information about the composition of water, including pH levels, dissolved oxygen, turbidity, and other trace elements that can affect its quality. However, interpreting the results of water quality analyzer readings can be complex and challenging. In this article, we will explore how to interpret water quality analyzer results to ensure that you have a clear understanding of the quality of your water.

Understanding the Basics of Water Quality Analysis

Before diving into the interpretation of water quality analyzer results, it is essential to understand the basics of water quality analysis. Water quality analysis is the process of examining the different chemical, physical, and biological properties of water to determine its safety and suitability for human consumption. A water quality analyzer can measure several parameters, including temperature, pH, turbidity, dissolved oxygen, conductivity, alkalinity, and hardness, among others.

Interpreting Results of Water Quality AnalyzerReadings

1. pH level

The pH level is a measure of the acidity or alkalinity of water. It ranges from 0 to 14, with a pH of 7 considered neutral, pH below 7 is considered acidic, and a pH above 7 is considered basic or alkaline. The ideal pH range for drinking water is between 6.5 and 8.5. A pH outside this range can indicate the presence of harmful chemicals or contaminants, such as heavy metals, which can pose serious health risks if consumed over extended periods.

2. Turbidity

Turbidity is a measure of water's cloudiness caused by suspended particles and sediment. Turbidity can affect the taste and clarity of water, and high levels of turbidity can be a sign of bacteria or viruses, making it unsuitable for human consumption. The World Health Organization recommends a turbidity level of 1 NTU (Nephelometric Turbidity Units) for safe drinking water, but many drinking water utility providers have set lower limits to ensure water quality.

3. Total Dissolved Solids

Total Dissolved Solids (TDS) is the measure of the total concentration of dissolved particles in water, including minerals, salts, metals, and organic compounds. High TDS levels can affect water taste, odor, and clarity, and long-term consumption of water containing high TDS can lead to health problems such as kidney stones and cardiovascular disease. The US Environmental Protection Agency recommends a TDS level of less than 500mg/L for safe drinking water.

4. Coliform Bacteria

Coliform bacteria are a group of bacteria that are commonly found in the environment and the intestines of animals, including humans. The presence of coliform bacteria in water indicates the possible presence of fecal matter, which can lead to gastrointestinal illnesses. Testing for coliform bacteria is a critical step in water quality analysis, and the US EPA has set a maximum contaminant level of zero.

5. Chlorine Residual

Chlorine is commonly used to disinfect and kill harmful microorganisms in water, and the presence of chlorine in water is essential to ensure that it is safe for human consumption. A water quality analyzer can measure the residual amount of chlorine in water after treatment, and a low chlorine residual level can be a sign of untreated or poorly treated water. The recommended level of chlorine residual in treated drinking water is between 0.2 and 2.0mg/L.


Interpreting water quality analyzer results is crucial to ensure that water is safe for human consumption. Understanding the basic parameters and what the results mean is an essential step in water quality analysis. Regular testing for water quality helps to identify any potential issues and allows for corrective action before any harm is caused to consumers. Protecting water quality is a shared responsibility that should be taken seriously by water utilities, regulators, and consumers alike.

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