ppm is a unit of measurement for water hardness, and it's used in water quality monitoring. So, what's a good ppm level for water quality testing ? What are the normal standards? Let's find out.
What is the ideal ppm level for water quality testing?
Water with a ppm level below 50 is considered to be of good quality. ppm is a unit of measurement for water hardness, which refers to the concentration of calcium and magnesium ions in water. 1 ppm means that the calcium carbonate content in the water is 1 milligram per liter (mg/L).
Water with calcium and magnesium ion content below 80 ppm is called soft water; water with content between 80 ppm and 160 ppm is moderately hard water; water with content between 160 ppm and 300 ppm is hard water; and water with content above 300 ppm is very hard water.
Water with a ppm value below 50 is considered good quality water, and according to the World Health Organization's drinking water quality guidelines, it is considered high-quality drinking water.
Which department should I contact for water quality testing?
Water quality testing can be conducted by departments such as the Product Quality Supervision and Inspection Bureau and the Health Bureau, which are authorized to perform water quality testing. Alternatively, you can contact the local water company, water testing center, or disease control center.
Simple test tips for water quality testing
1. TDS detection
TDS meters are the most commonly used water quality testing tools . Water quality depends on many factors, and TDS is just one of many water quality indicators. The TDS value reflects the content of dissolved substances in the water; the lower the value, the less dissolved substances are present in the water.
2. Residual chlorine detection in water
High chloride levels in water can damage metal pipes and structures and hinder plant growth. The main methods for determining chloride ions include: argentometric titration, ion-selective electrode method, ammonium thiocyanate titration, and silver nitrate titration.
3. Detection of cyanide in water
Cyanide ions can inhibit the activity of 42 enzymes in tissue cells. In addition, the hydroxide ions released by cyanide in the digestive tract have a corrosive effect. Inhaling high concentrations of hydrogen cyanide or swallowing large amounts of cyanide can cause respiratory arrest within 2 to 3 minutes, resulting in death in a "shock-like" manner.
