Water is the source of life. Human life and production activities are inseparable from water. The quality of drinking water is closely related to human health. With the social and economic development, scientific progress and the improvement of people's living standards, people's requirements for the quality of drinking water continue to improve, and the drinking water quality standards also continue to develop and improve accordingly. Because the formulation of drinking water quality standards is related to people's living habits, culture, economic conditions, scientific and technological development level, water resources and water quality status, there are differences in the requirements for drinking water quality not only among countries, but also among different regions of the same country.
Test items
Physical and chemical indexes: total hardness, total dissolved solids, total alkalinity (calculated by CaCO3), etc;
Inorganic anions: sulfate, fluoride, chloride, boron, bromide, iodide, carbonate (CO32 -), selenium, etc;
Nutrient and organic pollution indicators: ammonia nitrogen (NH3-N), permanganate index, chemical oxygen demand (CODcr), biochemical oxygen demand (BOD5), nitrate (n), nitrite (n), etc;
Metals: arsenic, mercury, hexavalent chromium, lead, zinc, copper, cadmium, iron, manganese, cobalt, nickel, tellurium, molybdenum, beryllium, barium, potassium, sodium, calcium, magnesium, etc;
Microorganism: total coliform group and total number of colonies;
Organic pollutants: volatile phenols, organophosphorus pesticides (OPP), organochlorine pesticides (BHC, DDT), 28 polychlorinated biphenyls (PCBs), 54 volatile organic compounds (VOCs) and semi volatile organic compounds (SVOCs).
Water quality inspection standard
Drinking water testing standard GB5749-2006
Detection standard for direct drinking water cj94-2005
Test standard for domestic sewage GB18918-2002
Water quality test standard for swimming pool cj244-2016
