※ Municipal sewage rate will be applied after the date of payment for Mars, 2013. Monthly average usage per household :  ㎥ (total usage ÷months)

- Usage for correspondent industrial category + Usage for correspondent household (monthly 15㎥ per household)

1) City Water Charge : KRW (round down to integer)

    ☞ ① ＋ ②

① Usage charge¿ { Averageusage for themonth× Rate+15㎥×360 KRW ×Number of household }×Monthsapplying correspondent category applying household② Customer charge¿¿ rate per diameter of water meter ×Months

2) Sewage Charge: KRW (round down to integer)

¿ { Averageusage for themonth× Rate+15㎥×260 KRW ×Number of household }×Monthsapplying correspondent category applying household3) Water Use Contribution: KRW (round down to integer)

¿ { Averageusage for themonth× Rate+15㎥×170 KRW ×Number of household }×Monthsapplying correspondent category applying householdSum of Charge: KRW

¿1 ¿CityWaterCharge+2 ¿SewageCharge+3¿WaterUseContribution

※ City water and sewage rate is applied following each block matched.    ☞ When monthly average usage is 500㎥, example of commercial city water rate is,

¿50㎥×800 KRW+250㎥×950KRW+200㎥×1,260KRW

(Example) When city water usage for 2 months is 593㎥, there are 2 households, and diameter of water meter is 25㎜,

Monthly average usage per household : 296.5 ㎥ (593 ㎥ ÷ 2months)- Usage for correspondent industrial category + Usage for correspondent household (monthly 15㎥ per household)Average usage for the month : 296.5㎥(593㎥ ÷ 2months) - 266.5㎥(Commercial) ＋ 30㎥(Households: 15㎥ per month, household)

1) City Water Charge : 523,350 KRW

    ☞ ① ＋ ②

① Usage charge : 512,950 KRW¿ {50㎥×800KRW+216.5㎥×950 KRW+15㎥×360KRW ×2Households }×2Monthsapplying correspondent category applying household② Customer charge¿5,200KRW ×2months=10,400KRW

Customer fixed rate per diameter of 25㎜

2) Sewage Charge: 575,110 KRW

¿{30㎥×320KRW+20㎥×660 KRW+50㎥×1,010KRW +100㎥×1,220KRW+66.5㎥×1,270KRWapplying correspondent category+15㎥×260 KRW }×2Monthsapplying household

      = 575,110 KRW

3) Water Use Contribution: ¿ {266.5㎥×170KRW +15㎥×170 KRW ×2Households }×2Months

Monthly average usage per household : 296.5 ㎥ (593 ㎥ ÷ 2months)- Usage for correspondent industrial category + Usage for correspondent household (monthly 15㎥ per household)Average usage for the month : 296.5㎥(593㎥ ÷ 2months) - 266.5㎥(Commercial) ＋ 30㎥(Households: 15㎥ per month, household)

100,810 KRW applying correspondent categoryapplying household

Sum of Charge: 1,199,270 KRW

¿523,350 KRW+575,110KRW+110,810KRWCity water Sewage Contribution

City Water Rate ※ Increased rate will be applied after 1st of February, 2012.

City water charge will be levied by adding up usage rate and customer rate following article 23, regulation of waterwork for Seoul. Usage charge is made up of three stepped rate structure for all of four business sections, customer charge is made up of fixed rate for each diameter of water meter.

Fixed rate for diameter of water meter

(Customer rate)

diameter(㎜) rate(KRW)

15 1,080

20 3,000

25 5,200

32 9,400

40 16,000

50 25,000

65 38,900

75 52,300

100 89,000

125 143,000

150 195,000

200 277,000

250 375,000

300 465,000

350 565,000

Usage rate

Business

sectionUsage (㎥)

Unit cost per ㎥

(KRW)

Household

0∼30 or less 360

Over 30∼50 or less 550

Over 50 790

Bathhouse

0∼500 or less 360

Over 500∼2,000 or

less420

Over 2,000 560

Public

0∼50 or less 570

Over 50∼300 or less 730

Over 300 830

Commercial

0∼50 or less 800

Over 50∼300 or less 950

Over 300 1,260

Fixed rate for diameter of water meter

(Customer rate)

400 or more 615,000

Municipal sewage rate※ Municipal sewage rate will be applied after the date of payment for Mars, 2013.Municipal sewage charge will be levied following article 23, regulation of waterwork for Seoul. The charge is made up of three to six stepped rate structure for all of four business sections,

Usage rate

Business section Usage (㎥) Unit cost per ㎥(KRW)

Household

0∼30 or less 260

Over 30∼50 or less 610

Over 50 930

Bathhouse

0∼500 or less 290

Over 500∼2,000 or less 360

Over 2,000 410

Public

0∼50 or less 460

Over 50∼300 or less 730

Over 300 840

Commercial

0 ∼ 30 or less 320

Over 30 ∼ 50 or less 660

Over 50 ∼ 100 or less 1010

Over 100 ∼ 200 or less 1220

Over 200 ~ 1,000 or less 1270

Over 1,000 1330

Per 1㎥ of discharged underground water 260

Usage rate

Business section Usage (㎥) Unit cost per ㎥(KRW)

Water use contribution

Water use contribution is levied 170 KRW per 1㎥ regardless of business section. (after the date of usage for 1st of February, 2011)