What is Ultrapure Water?

Ultrapure water, as the name suggests, is water purified to the highest standards making it completely free of contaminants. This level of purification is required for advanced analytical techniques, such as HPLC, and is commonly used for semi-conductor manufacturing. To produce ultrapure water a combination of different purification techniques is required to remove different contaminants. This can include ion-exchange resin, synthetic activated carbon, UV photo-oxidation lamps, microfiltration membranes, ultrafiltration membranes. Some systems operate directly from tap water and others from pure water.

Due to the high level of purification ultrapure water has low levels of anionic contamination, resulting in ultrapure water having a resistance of up to 18.2 mOhm-cm. When selecting an ultrapure water purification system consider; the available feed water, necessary volumes, and required water quality monitoring.


Ultra-pure water requires 12 filtration steps beyond RO (Reverse Osmosis) . UPW is used in the semiconductor and pharmaceutical industries the most, though it’s an ideal solution for any work in the lab. Its level of purification makes it versatile for highly sensitive applications. Comprehensive treatment backed by the confidence of our industry-leading water quality monitoring will deliver UPW that fits your specific needs, day after day. Our broad offering of equipment, filters, membranes, chemicals, and services comprise complete UPW systems that serve a range of water sources.

SUEZ can develop a custom UPW solution that:

  • Delivers large amounts of consistent UPW with expedited analysis and real-time monitoring
  • Uses resources efficiently and seamlessly integrates into existing systems
  • Reduces operating, maintenance, and overhead costs
  • Ensures regulatory compliance and streamlines chemical and fluid management
  • Monitors low levels of TOC and Boron to ensure optimal product outcome 

What are the different types of water type?

Water for laboratory applications is graded by water type, from Type 1 to Type 3 (I to III). Types 1 to 3 are the most commonly used. Type 3 water is the lowest laboratory grade and Type 1 ultrapure water is the highest. The water types define the water specifications regarding the levels of contaminants such as organics, ions, pyrogens and bacteria. We offer a range of widely used, high-specification laboratory water treatment products enabling the configuration of bespoke solutions to support specific applications

Type 1 Ultrapure Water Applications

Ultrapure water is needed for some of the most water-critical laboratory applications such as:

  • High performance liquid chromatography (HPLC)
  • Gas chromatography (GC)
  • Atomic absorption spectrophotometry (AAS)
  • Inductively coupled plasma mass spectrometry (ICP-MS)
  • Molecular biology
  • Mammalian cell culture
  • In vitro fertilisation (IVF)

The selection of the proper type1 water system for your laboratory will depend on several parameters such as:

  • feed water available
  • daily volume needs
  • monitoring requirements
  • certification levels expected

and any other specific requirements you may have. 

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