It depends what substance there are 10 parts per million of.
Between 50 ppm and 300 ppm is safe. Better below 100 ppm.
it should be below 3.5 ppm
60 -100 ppm is the currently acceptable hardness level for drinking water in US and Canada.60 -100 ppm is the currently acceptable hardness level for drinking water.
The recommended safe level of TDS (total dissolved solids) in drinking water is below 500 parts per million (ppm).
A good parts per million (ppm) level for water quality is typically below 500 ppm. This level ensures that the water is safe for drinking and other uses.
0.o15 ppm
The safe limit for salt in drinking water is somewhat debatable. In the United States, 1000 ppm is the limit for humans while 2000 ppm is the limit for livestock or watering of crops.
0.1
Chlorine at 0.5 ppm is typically not considered dangerous for human health. In drinking water treatment, chlorine is used as a disinfectant to kill harmful microorganisms. At 0.5 ppm, it is generally safe for consumption and effective in preventing waterborne diseases.
5 ppm
The maximum acceptable level of contaminants in drinking water is typically set at 0.01 parts per million (ppm). This means that water with 0 ppm of contaminants is considered to be of the highest quality, as it contains no harmful substances that could potentially impact human health.
"ppm" simply means 'parts per million' and describes the quantity of any substance in water. For example -Iron should be less than 3 ppm."ppm" simply means 'parts per million' and describes the quantity of any substance in water. For example -Iron should be less than 3 ppm.