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Total Dissolved Solids of Water


What is total dissolved solids? 
Total dissolved solids is the concentration of the sum of the cations and anions in the water. In order words, Total Dissolved Solids  are the total amount of mobile charged ions, including minerals, salts, or metals dissolved in a given volume of water, expressed in unit of milligrams per unit volume of water (mg/l), or part per million (ppm).  Total Dissolved Solids is directly related to purity of water and quality of water purification system and affects everything that consumes, live in or uses water. While suspended solids are any particles or substances that are neither dissolved nor settled in water such as chips.

Sources of Total Dissolved Solids
The presence of total dissolved solids in water can come from either organic or inorganic sources.
1. Organic sources of Total Dissolved Solids
Leaves, silt, phytoplankton, industrial wastes, sewage, run- off from urban areas, fertilizer and pesticides
2. Inorganic sources of Total Dissolved Solids
Rocks, air(that may contain calcium bicarbonate, nitrogen, iron, phosphorus, sulphur and other minerals).


Health Concern
Due to health concern it have become necessary to measure and know the Total Dissolved Solids level in your drinking water. Due to the following reasons it is important to measure and know the Total Dissolved Solids concentration of drinking water
1. High concentration of TDS in water is an indicator for the presence of potassium, chloride, and sodium, e.t.c  these ions have little or no short term effects, but toxic ions such as lead, arsenic, cadmium, nitrates and others may also be dissolved in water.
2. High level of  Total Dissolved Solids are of great concern and considered unfit for human consumption.
3. High TDS result in undesirable taste Which could be salty, bitter or metallic. It could also indicate the presence of toxic minerals.
4. High TDS also help to know the effectiveness of a water purification system
5. High TDS also indicate a hard water

How to Treat High TDS
1. Use common  water filters and purification system
2. Carbon filtration system.

WHO and EPA recommended 500mg/l as upper acceptable limits for Drinking Water

Table Top TDS Meter





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