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Domestic consumers are usually billed
for their water charges at 4-monthly intervals according
to the meter readings taken.
The charges payable are calculated
on a tariff structure which consists of 4 tiers with
progressively increasing prices. The tariff is so constructed
to discourage excessive and unnecessary use of water.
The following tariff structure is
applicable to water consumed in billing periods which
commence on or after 16 February 1995:
- the first tier of 12 cubic metres
is free of charge;
- the second tier of 31 cubic metres
is charged at $4.16 per cubic metre;
- the third tier of 19 cubic metres
is charged at $6.45 per cubic metre; and
- the fourth tier for any consumption
above the level of 62 cubic metres is charged at $9.05
per cubic metre.
To demonstrate how the water charge
is calculated, here is a simple example. A consumer
consumed 100 cubic metres of water in a 4-month period.
The water charge would be calculated by multiplying
the consumption volume by the per unit water charge.
That is, by multiplying 31 cubic metres by $4.16 plus
19 cubic metres by $6.45 plus 38 cubic metres by $9.05.
The consumer is therefore required to pay a water charge
of $595.41.
For the purpose of calculating water
charges, a 4-month period is defined as 121.64 days
in the Waterworks
Regulations.
Since water meters will not be read
at intervals of exactly 121.64 days, the volume covered
by each tier is adjusted on a pro-rata basis according
to the actual number of days in the period between two
meter readings. As such, a consumer who uses the same
amount of water as another one but over a longer period
of time will receive a lower water bill.
Please refer to the following examples
for detailed method of calculation or work out a scenario
of your water and sewage charges incurred on basis of
your past consumption pattern according to your latest
water bill.
Example 1
Registered consumer: Mr. Chan
Consumption period: from 1/8/1995 to 6/12/1995 (127 days)
Water consumption: 66 cubic metres
The calculation is :
Tier Consumption Rate(HK$) Charges(HK$)
_____________________________________________________________
first 12x127/121.64 = 12.529 x 0.00 0.00
second 31x127/121.64 = 32.366 x 4.16 134.64
third 19x127/121.64 = 19.837 x 6.45 127.94
fourth remaining 1.268 x 9.05 11.47
_____________________________________________________________
Total 66.000 274.05
Example 2
Registered consumer: Mr. Lee
Consumption period: from 1/8/1995 to 26/11/1995 (117 days)
Water consumption: 66 cubic metres
The calculation is :
Tier Consumption Rate(HK$) Charges(HK$)
_____________________________________________________________
first 12x117/121.64 = 11.542 x 0.00 0.00
second 31x117/121.64 = 29.817 x 4.16 124.03
third 19x117/121.64 = 18.275 x 6.45 117.87
fourth remaining 6.366 x 9.05 57.61
_____________________________________________________________
Total 66.000 299.51
Mr. Lee pays more than Mr. Chan because he consumed the
same quantity of water in a shorter period (117 days)
than Mr. Chan (127 days).
- You can use our simple calculator
to estimate the water and sewage charges for domestic supply (Note: the calculation result cannot be used for payment purpose);
- work out a scenario of your water and sewage charges incurred on basis of your past consumption pattern according to your latest water bill.
Please note that the above calculations
are for reference only. Actual bills will be different
from the amounts calculated because of the Sewage
Charges, rounding of odd cents brought down from
last or carried forward to next bills and surcharges
of 5% for overdue bills.
Non domestic consumers are usually
billed for their water charges at 4-monthly intervals
according to the meter readings taken. For consumers
having large water consumption, they are billed at monthly
intervals.
The charges payable are calculated
at a flat rate dependent on the purpose of the supply.
The following rates are applicable
to water consumed in billing periods which:
Commence on or after 16 February 1995
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| For trade |
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$4.58 per cubic metre |
| For construction |
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$7.11 per cubic metre |
| For non ocean-going shipping |
|
$4.58 per cubic metre |
| For ocean-going shipping |
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$10.00 per cubic metre |
Commence on or after 1 July 1996
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| For ocean-going shipping |
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$10.93 per cubic metre |
To demonstrate how the water charge
is calculated, here is a simple example. A trading firm
consumed 100 cubic metres of water in a 4-month period.
Its water charge would be calculated by multiplying the
consumption volume by the per unit water charge. That
is, by multiplying 100 cubic metres by $4.58 per cubic
metre. The trading firm is therefore required to pay a
water charge of $458.
You may work out a scenario
of your water and sewage charges incurred on basis of
your past consumption pattern according to your latest
water bill.
Sea water supply for flushing is free
of charge, while fresh water supply for flushing is
usually billed at 4-monthly intervals according to the
meter readings taken. There is only one meter installed
in each building to record the total consumption of
all flats in the same building.
The charges payable are calculated
on a tariff structure which consists of two tiers. The
following tariff structure for a 4-month period is applicable
to water consumed in billing periods which commence
on or after 16 February 1995:
- the first tier of 30 cubic metres
per flat is free of charge; and
- the second tier of any consumption
above the level of 30 cubic metres per flat is charged
at $4.58 per cubic metre.
To demonstrate how the flushing charge
is calculated, here is a simple example. A consumer
consumed 100 cubic metres of water in a 4-month period.
The water charge would be calculated by multiplying
the consumption volume by the per unit water charge,
i.e. by multiplying 70 cubic metres by $4.58. The consumer
is therefore required to pay a water charge of $320.6.
For the purpose of calculating water
charges, a 4-month period is defined as 121.64 days
in the Waterworks
Regulations.
Since meter readings will not be taken
at intervals of exactly 121.64 days, the volume covered
by each tier is adjusted on a pro-rata basis according
to the actual number of days in the period between two
meter readings. If the interval between two readings
is greater than 121.64 days, then more than 30 cubic
metres of water per flat will be provided free of charge.
Consumers should note that charges
for flushing supply are not included in their individual
water bills, but are billed separately to the registered
consumer who is usually the management office, agent,
incorporated owner or development company.
A consumer whose premises are connected,
whether directly or indirectly, to a communal drain
or a communal sewer for the purpose of removing wastewater
therefrom shall pay a sewage charge on the volume of
water supplied.
- For Domestic Supplies
- Domestic consumers are billed
for their sewage charges at a 4-month interval. The
sewage charges are calculated at $1.31 (with effect from 1.4.2008) per cubic metre
of water consumed, with an exemption for the first
12 cubic metres for a 4-month period, which is defined
as 121.64 days in the Waterworks
Regulations.
- For Trade Supplies
- For trade, business and manufacture
consumers, the sewage charges are calculated at $1.31 (with effect from 1.4.2008)
per cubic metre of water supplied. There is no sewage
charge for shipping supplies if there is no connection
to a communal drain or a communal sewer.
Some trades are eligible for 30%
discount on their sewage charges payable. They are : -
- bleaching and dyeing of garments,
- bleaching and dyeing of knitted fabric,
- bleaching and dyeing of woven fabric
- bleaching and dyeing of yarn,
- knit outerwear,
- soft drinks and carbonated waters industries,
- breweries and manufacture of malt liquor,
- distilling, rectifying and blending spirits,
- restaurants,
- ice-making industry.
- For 30 types of trade/business/manufacture
which discharge trade effluent, the consumer shall, in addition to
the sewage charge, pay a Trade Effluent Surcharge, which is calculated
based on the volume of water consumed and at a rate corresponding to
the trade/business/manufacture operated - as defined in the Sewage
Services (Trade Effluent Surcharge) Regulations. For details of
sewage charging, please refer to the homepage of
Drainage Services Department.
- For Flushing Supplies
- There is no sewage charge for flushing supplies.
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