Water Management

SEOUL SOLUTION

Water Management

Arisu – one of the safest and best quality drinking water

Seoul is blessed with the Han River, an abundant body of water where Arisu is sourced from. Arisu undergoes tap water quality tests for 163 substances as recommended by the WHO including direct tests on 5 major substances such as residual chlorine, turbidity, hydrogen ion concentration, iron and copper.

10 million : Population served
3.2 million m² : Average daily production
4.35 million m² : Daily production capacity
13,846 km : Tap water piping network
94% : Rate of water flow

Strict Quality Control

Number of Water Quality Items Tested

163 items tested	Location	WHO	Seoul	USA	Japan	France	Australia
163 items tested	# of Items Tested	163	163	102	121	63	199

Inexpensive & 24/7 Supply

Water Utilities Bill of the World’s Major Cities

Revenue Water Ratio of the World’s Major Cities

Production/Impose Volume & Rate of Water Maintained

Smart Operation

Water Purification Centers

Approximately 3.2 million m³ of water is required to serve 10 million citizens each day. SMG operates six purification centers and five water intake stations to produce a vast amount of tap water.

Waste Water Management

Overview

10 million: Population served
5.8 million m³: Capacity per day
10,500 kl: Night soil & septic
700 tons: Daily sludge treatment

Before 1960	1960s ~ 1970s	1980s ~ 1990s	2000 ~ Present
GNI : USD 80/capita Area : 268km² Pop. : 2.4 mil.	GNI : USD 1,645 Area : 605km² Pop. : 8.3 mil.	GNI : USD 10,841 Area : 605km² Pop. : 10.3 mil.	GNI : USD 20,250 (2010) Area : 605km² Pop. : 10.17 mil.
No Treatment plants Sewage and night soil discharged into streams and Han River	Streams in Seoul severely contaminated All 36 streams dangerous 24 streams covered up	Increase in sewage volume Serious Pollution	Greater demand to improve environment Mandatory onshore treatment of sludge Strengthened sewage treatment standards
Reconstruction and extension of sewers(225km)	Institutional arrangements and organization reform Construction of 5,940km sewers Open sewers were covered up Construction of two sewage treatment facilities	Master plan for sewage and drainage in Seoul (1983) Expansion of sewage treatment facilities Introduction of separate pipes to separate rain and waste water Rehabilitation of existing pipes Introduction of Trenchless Pipe Lining in pipe maintenance(1995)	Construct sludge treatment facilities Introduce advanced sewage treatment facilities Transform into a facility that produces new and renewable energy Ensure transparent management of the sewage treatment facilities Eliminate sewer plant odor and build parks for citizens

Han River Water Quality – Gayang point

Sewage Treatment Centers

Seoul operates 4 Sewage Treatment Centers to treat 5 million tons of sewage, excreta and food waste water in a clean and safe manner. The center contributes to water quality improvement in rivers and a healthy aquatic ecosystem.