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365 days Clean and Safe water

The office of Waterworks headquarters of Daegu Metropolitan City oversees the production
of only safe and clean tap water.

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  3. Production process

Cheongnasu

Production process

Production process for Daegu’s tap water

The tap water of Daegu is produced through a highly effective purification and processing system. Our region operates an advanced water treatment facility at Nakdonggang River (water source) and a rapid filtration facility at the water source from the Nakdonggang River dam, which together produce extremely high-quality, clean tap water.

Advanced water treatment facility

Water intake center, Advanced water purification treatment, Pre-ozone contact site, Receiving well, Input of chemicals, Mixing basin, Coagulation chamber / settling basin, Sand filtration site, Advanced water purification treatment, Post-ozone contact site, Activated carbon absorption site, Purification site, Distribution reservoirHousehold

General filtration treatment facility

Water intake center, Receiving well, Mixing basin, Coagulation chamber / settling basin, Sand filtration site, Purification site, Distribution reservoir, Household

  • * Pre-ozone contact site : where algae and trace amounts of harmful substances, including 1,4-dioxane, are removed from the water
  • * Water intake center : where source water is drawn and sent to a water purification plant for use as tap water
  • * Mixing basin :where chemicals are mixed into the water well
  • * Coagulation chamber : the chemical process of contact and adhesion whereby the particles of a dispersion (colloids) form larger-size cluster (flocs or flakes)
  • * Settling basin : where concentrated matter is allowed to settle out of the water
  • * Sand filtration site : where the water is filtered by passing it through layers of sand and gravel
  • * Ozone contact site : where organic substances are decomposed or oxidized
  • * Activated carbon absorption site : where organic substances are removed through absorption
  • * Purification site : where water is stored after the treatment process is completed
  • * Distribution reservoir : where water from the water purification plant is stored before being used as tap water