Water testing

  1. Importance of Water testing:
  • According to the Community Environmental Research Center, about 70% of wastewater from industrial zones is not treated but discharged directly into the environment. Typically in Ho Chi Minh City, in rivers, the concentration of pollutants in the water exceeds the allowable standard (from 1.5 to 3 times).
  • The situation of water pollution in our country has led to terrible consequences for people. Every year, international organizations continue to give worrying figures about water pollution in our country:
  • About 9,000 people die each year from water pollution.
  • About 20,000 people are found to have cancer due to water pollution.
  • About 44% of children become infected with worms due to poor-quality water. 27% of children under 5 years old are malnourished due to a lack of clean water and poor sanitation (according to  WHO ).
  • About 21% of the population is using water contaminated with Arsenic – or inorganic Arsenic is a highly toxic chemical commonly used in the creation of herbicides and pesticides (according to the Ministry of Health). and Ministry of Natural Resources and Environment).
  • Therefore, testing domestic water is an urgent need to check and provide effective solutions to the pollution of water in use in households. As for enterprises and business establishments in Vietnam, in order for enterprises to be granted operation and business licenses, they must meet the criteria for testing domestic water according to current regulations.
  • For successful and fast safety testing, in accordance with the law. Depending on testing purposes, soil, and geographical characteristics in regional and local areas, testing criteria must be established but must be based on the following legal documents:
  • QCVN 01-1:2018/BYT on the quality of clean water used for daily life (1 sample of finished water tested for 99 parameters according to regulations of the Ministry of Health).
  • This regulation applies to organizations and individuals that carry out part or all of the activities of exploitation, production, transmission, wholesale, and retail of clean water under a complete centralized water supply system (hereinafter referred to as water supply unit); state management agencies in charge of inspection, examination and supervision of clean water quality; testing laboratories and certification bodies of water quality parameters.
  • This regulation does not apply to drinking water directly from the tap, bottled water, bottled water, bottled natural mineral water, bottled water, water produced from water filters, water purification systems, and other types of water. Not used for domestic purposes.
  • QCVN 08-MT:2015/BTNMT: National technical regulation on surface water quality (1 surface water sample tested for 36 parameters according to regulations of the Ministry of Natural Resources and Environment). This standard applies:
  • Assess and manage the quality of surface water as a basis for the protection and appropriate use of water.
  • To serve as a basis for making and approving master plans on water use according to defined use purposes. Assess the suitability of surface water quality with the approved water use planning.
  • As a basis to control discharge sources into receiving sources, ensuring surface water is always suitable for use purposes.
  • As a basis for implementing measures to improve and restore water quality.
  • QCVN 09:2008/BTNMT: National technical regulation on groundwater quality (1 surface water sample tested for 32 parameters according to regulations of the Ministry of Natural Resources and Environment). This regulation is applied to assess and monitor the quality of underground water sources, as a basis for orientation for different water use purposes.
  1. Test criteria
    • Microbiological indicators:
  • Analysis to determine the limit of microbiological contamination:
  • coli, Coliform and Fecal coliform
  • H2S .-producing anaerobic bacteria
  • Pseudomonas aeruginosa
  • Staphylococus aureus
  • Legionella spp
  • The total number of aerobic microorganisms, …
    • Chemical specifications:
  • Sensory (pH, state, turbidity, color, odor, taste)
  • Radioactivity ab
  • Metal content: Pb, Cd, As, Hg, Na, K, Mg …
  • Inorganic criteria: Nitrate, nitrite, sulfate, residual chlorine, hardness, ammonium…
  • Group pesticides: Phosphorus, Chlorine, Chrysanthemum, Carbamate, Triazole, …
  • Volatile organic compounds VOCs, Phenols and phenol derivatives.
  • Các anion: Chlorate, Chloride, Bromate, Pechlorate, …
  1. Analytical device:

In order to promptly meet the needs of customers and improve the quality of testing activities, TSL has equipped with modern and synchronous analytical equipment:

  • Molecular absorption spectrophotometer (UV-Vis).
  • Ion chromatography (IC) system.
  • Liquid chromatography system with probes (HPLC/DAD/FLD, UPLC/DAD/FLD/RID) and liquid chromatography coupled mass spectrometry (LC/MSMS).
  • Gas chromatography systems (GC/FID/ECD) and gas chromatography coupled mass spectrometry (GC/MSMS).
  • Atomic absorption spectrophotometer (AAS) system.
  • Atomic emission spectrometer system (ICP – OES) and ICP – MS system.
  1. Analytical method:
  • All analytical procedures used for testing on the water sample at TSL are referenced to the standard methods of Vietnam and common standards in the world such as TCVN, QCVN, AOAC, ISO, … and all these processes are surveyed and validated in accordance with ISO 17025.
  • All methods are tested to assess staff skills, participate in inter-departmental comparisons and implement domestic and international PT programs.
  • The majority of analytical methods are accredited to ISO 17025 by AOSC.
  • In addition, TSL is also designated by ministries and sectors as a testing agency for state management:
  • The Ministry of Health specified in the certificate: 554/QD-ATTP.
  • The Ministry of Natural Resources and Environment specified in the certificate: 581/QD-BTNMT.