Water quality testing inevitably involves TDS testing. TDS is an abbreviation for Total Dissolved Solids. So what are the TDS water quality testing standards? Let's find out below.
What are the TDS water quality testing standards?
TDS (Total Dissolved Solids) value measures water purity; a TDS value of ≤1000 mg/L is considered normal for drinking water. TDS, or total dissolved solids concentration (mg/L), primarily reflects the concentration of Ca2+, Mg2+, Na+, and K+ ions in the water, and has a strong correlation with water hardness and conductivity. The lower the TDS, the lower the concentration of Ca2+, Mg2+, Na+, and K+ ions in the water, and the lower the conductivity.
Indicators for drinking water quality testing
1.tds
According to GB5749-2006 "Standards for Drinking Water Quality", tds (total dissolved solids) ≤1000mg/L.
2. Color
Water color refers to the quantitative measurement of the color of natural water bodies or various treated waters. Natural water generally exhibits several colors such as pale yellow, pale brown, and yellowish-green. Water discoloration is mainly caused by dissolved humic substances, organic matter, and inorganic matter. Drinking water exceeding 15 degrees Celsius is noticeable to most people. According to the "Standards for Drinking Water Quality," the color of drinking water must not exceed 15.
3. Turbidity
Turbidity is an important indicator of the physical properties of water. It represents the degree to which suspended solids and other substances in water obstruct light transmission. Generally speaking, the more insoluble matter in water, the higher the turbidity. Turbidity is mainly caused by clay, sludge, colloidal particles, plankton, microorganisms, etc., and is used to indicate the clarity or turbidity of water, thus measuring water quality. According to the "Standards for Drinking Water Quality," the turbidity limit for drinking water is 1 NTU, and the turbidity limit for source water and purified water is 3 NTU.
4. pH value
A pH value between 0 and 14 is a standard for measuring the acidity or alkalinity of water. A pH value less than 7 indicates acidity, while a pH value greater than 7 indicates alkalinity, or neutrality. GB5749-2006, the "Standards for Drinking Water Quality," stipulates that a pH value of 6.5-8.5 is the normal range for drinking water.
