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Information about hygiene management of cistern to receive

Last update date May 1, 2020


It is site of Yokohama-shi public health center health security department Health Sanitation Division here. We provide information about hygiene of drinking water.

About conduct of check of ceremony tray water tank caused by earthquake under the ground

When earthquake got up as cracks may occur to ceremony tray water tank under the ground under the influence of earthquake, let's carry out the next check.

In addition, we hope that facility is checked every day while aftershock continues.

Information about the regulations revisions such as small scale tray water tank water supply

Information about the regulations revisions such as small scale tray water tank water supply

Information about disaster water tank utilization

Information about disaster hourly wage water cooperation water tank recognition system

Contents

With water supply, we say the entirety of facility supplying water as water which is suitable for a person's drinking by pipe and other workpieces.
We are classified in water supply business, small water-supply system business, exclusive water supply, temporarily exclusive water supply, small scale tray water tank water supply, drinking well by conditions such as supply objects of tap water.

(reference) Water supply method Article 3 Paragraph 1
We say the entirety of facility supplying water as water which is suitable for a person's drinking by pipe and other workpieces with "water supply" in this law. But we remove thing provided equipment temporarily.

Maximum water supply is water supply more than 20 cubic meters, and exclusive water supply says thing corresponding to any of the following on water supply supplying more than 101 residents with water or 1st.
1.We supply only water (well water) of self-water source
2.We mix water catching supply from water of self-water source and other water supply (water supply of City of Yokohama, Water Works Bureau) and supply
3.We assume only water catching supply from other water supply water source and correspond to any of the following
Oh, the totals of effective capacity of water tank exceed 100 cubic meters
Full length of 25 millimeters of i diameters or more pipes exceeds 1,500 meters
(but we do not count capacity and extension of water tank and pipe that were established highly so as not to be affected by pollution from the surface of the earth.)
To exclusive water supply, election of water supply technology manager and monthly examination of water are required.

(reference) Water supply method Article 3 Paragraph 6
"Exclusive water supply" is water supply except water supply to offer for one of private water supply or other water supply business in dormitory, company house, sanatorium and says thing corresponding to either of each issue of next in this law. But we remove water supply standard that we assume only water catching supply water source and scale of part provided equipment sets of the underground or the surface of the earth by cabinet ordinance among the water supply facilities or less from other channels.
We supply water necessary for the residence to person more than 1 100.
All day long maximum water supply (we say maximum quantity of water that can supply with water per day.of 2 water supply facilities We exceed the same standard that) sets by cabinet ordinance as follows

The handling of exclusive water supply

Please refer to "(PDF: 335KB) for the brochure handling of exclusive water supply" whether you correspond to exclusive water supply.

Guide of exclusive water supply

Please refer to "guide (PDF: 390KB) of water supply for exclusive use of Yokohama-shi" for precautions at the time of installation construction confirmation application.

About installation construction

Installation construction of water supply

Installation construction of water supply means new establishment, enlargement of water supply facility, construction of remodeling.

(reference) Water supply method Article 3 Paragraph 10
"Installation construction of water supply" is new establishment of water supply facility or cabinet ordinance and says construction of the enlargement to set or remodeling in this law.
(reference) Water supply method enforcement order Article 3
We shall raise construction of enlargement of water supply facility establishing in cabinet ordinance to prescribe in law Article 3 Paragraph 10 or remodeling to each issue of next.
Water supply all day long maximum 1, construction to affect change of classification, water intake point or method of water purification of water source
Construction to affect new establishment, enlargement of 2 deposition ponds, filtration pond, pure water reservoir, disinfection equipment or distributing reservoir or remodeling of large scale

New establishment of water supply facility

It is water supply facility that is water intake facility, storing water facility, raw water transmission facility, clean water facility, water supply facility and water supply facility and, with "new establishment of water supply facility", is in all or installing either facility newly at all.

Construction of the enlargement to establish in cabinet ordinance or remodeling

As "construction of the enlargement to establish in cabinet ordinance or remodeling" is construction of large-scale or important part and establishes in cabinet ordinance,
・Construction to affect change of maximum water supply, classification of water source, water intake point or method of water purification all day long
・Construction to affect new establishment, enlargement of deposition pond, filtration pond, pure water reservoir, disinfection equipment or distributing reservoir or remodeling of large scale
It is thing of this.
"Construction to be concerned" with includes supplementary work to be necessary with the construction, allied construction as well as construction itself.
With "construction to affect remodeling of large scale", we say remodeling construction to affect good portion of the facility.

Facility standard of water supply

Facility standard of water supply is prescribed by the water supply methods.

(reference) water supply method Article 5
Water supply should have all or a part of water intake facility, storing water facility, raw water transmission facility, clean water facility, water supply facility and water supply facility depending on quality of Haramizu and quantity, geographical condition, form of the water supply concerned, and each facility must be thing with requirements to raise to each issue of next.
(1)Water intake facility being just done, and the required amount being able to take in high quality natural water.
(2)Storing water facility having ability for storing water necessary to supply natural water of the required amount at shortage of water.
(3)Raw water transmission facility have pump necessary to send natural water of the required amount, aqueduct or other facilities.
(4)Clean water facility has deposition pond necessary to get clean water of the required amount to adapt to standard of water by regulations of preceding article, filtration pond or other facilities according to quality of Haramizu and quantity and comprising disinfection equipment.
(5)Water supply facility have pump necessary to send clean water of the required amount, water line or other facilities.
(6)Water supply facility have distributing reservoir, pump, water pipe or other facilities necessary to supply clean water of the required amount by pressure above a certain level in succession.
It becomes economical as possible and easy, and constant meruniatatsuteha, the installation and maintenance must consider certainty of water supply with position of 2 water supply facilities and sequence.
Fear structure of 3 water supply facilities and materials have enough proof stresses for water pressure, earth pressure, earthquake power or other load and water is polluted or to leak must be thing which there is not.
We set necessary technical standard of Paragraph 3 before 4 in Ministry of Health, Labour and Welfare ordinance (the outside site) other than thing to prescribe about water supply facility.

About installation construction confirmation application of exclusive water supply

When we perform installation construction of exclusive water supply, installation construction confirmation application is necessary beforehand.
Please consult to Health and Welfare Center Health Sanitation Division of facility location ward.

Duty of installer of exclusive water supply

Conduct of periodical examination of water

Exclusive water supply installer is required to carry out partly periodical examination of water to fix for Ministry of Health, Labour and Welfare ordinance by regulations of water supply method Article 20 Paragraph 1. "Color to perform once a day becomes dull and, in periodical examination of water, there are inspection about residual chlorine" and "inspection to perform every about one time a month".
In addition, installer must devise examination of water plan in consideration for tap water source or the neighboring situation before start of every fiscal year by regulations of water supply method enforcement regulations Article 15 Paragraph 6.
When we carried out examination of water based on plan, as for the installer, it is necessary to report examination of water result immediately to Health and Welfare Center Health Sanitation Division of facility location ward.

Effective capacity of cistern to receive is with small scale tray water tank Channel in facility where effective capacity of temporarily exclusive water supply, cistern to receive is 10 cubic meters or less in facility more than 10 cubic meters. But one thing using only at home is excluded.

(reference) Water supply method Article 3 Paragraph 7
Water supply to offer for water supply deatsute except water supply to offer for one of water supply business and exclusive water supply, one of water supply business says thing which assumes only water receiving supply water source with "temporarily exclusive water supply" in this law. But we remove things standard that scale of facility to offer in the business establishes in cabinet ordinance or less.

(reference) Water supply method enforcement order Article 2
As for the standard to establish in cabinet ordinance prescribed in law Article 3 Paragraph 7 proviso, the total of effective capacity of water tank which is established to receive supply of water from water supply to offer for one of water supply business decides to be 10 cubic meters.

(reference) Regulations Article 2 about securing of drinking water which is hygienic by security in Yokohama-shi simple water supply water supply and small scale tray water tank water supply
(6)Small scale tray water tank water supply: It is water supply except water supply to offer for one of water supply business, exclusive water supply and temporarily exclusive water supply, and water supply to offer for one of water supply business says thing to establish water tank we assume only water receiving supply water source and to receive the water, and to supply drinking water to. But we remove thing to supply to one house exclusively.

Management of temporarily exclusive water supply and small scale tray water tank water supply

Temporarily exclusive water supply and small scale tray water tank water supply need the next management.

Report to 1 Health and Welfare Center

・We report (after the water supply start), water supply start notice to Health and Welfare Center Health Sanitation Division of facility location ward after building beginning to use immediately.
Temporarily exclusive water supply water supply start registration form (word: 52KB)
Small scale tray water tank water supply water supply start registration form (word: 51KB)
・When we abolish change or facility in contents of facility or water supply start registration form, we do report immediately.
Temporarily exclusive water supply water supply start notice items mentioned change/abolition registration form (word: 40KB)
Small scale tray water tank water supply water supply start notice items mentioned change/abolition registration form (word: 41KB)
※Cistern to receive using at one home does not need report.

Cleaning of 2 tray water tank

It is once within one year
※The following paragraphs, please refer to "cleaning of temporarily exclusive water supply and small scale tray water tank water supply".

Undergoing an examination of 3 management situation periodical inspection

It is once within one year

※From April 1, 2011, installer of all "ceremony tray water tanks under the ground" was obliged to carry out undergoing an examination of examination for management situation.
The details (page of information about the regulations revisions such as small scale tray water tank water supply)
※The following paragraphs, please refer to "inspection of the management situation of temporarily exclusive water supply and small scale tray water tank water supply".

4 check

・We perform everyday simple examination of water (it is muddy, and color is stinking taste).
※When there is abnormality, we contact Health and Welfare Center Health Sanitation Division promptly.
・We provide equipment and check and do necessary repair.

When 5 facilities are polluted

・We stop water supply.
・We inform not to drink water to user.
・We contact Health and Welfare Center Health Sanitation Division promptly.

Cleaning of temporarily exclusive water supply and small scale tray water tank water supply

Cleaning of cistern to receive is required to perform for fixed period once within one year.
Cleaning of cistern to receive recommends that we consign to specialized environmental hygienist.
When the nearest environmental hygienist is missing, please ask the next groups.
※The next organization is group organized in registration company (building drinking water water tank cleaning business) of mayor or Governor of Kanagawa.

List of contact information of group organized in registration company (building drinking water water tank cleaning business) of mayor or Governor of Kanagawa
Group nameTelephoneFax
Association of Kanagawa building maintenance045-641-2802045-641-0389
Nonprofit foundation Kanagawa life Mizuho National Council of Workers' Unions of Japan society045-830-5720045-830-5722
Association of Kanagawa water tank management045-370-8020045-370-7654

Inspection of the management situation of temporarily exclusive water supply and small scale tray water tank water supply

From temporarily exclusive water supply, small scale tray water tank water supply (effective capacity thing more than 8 cubic meters) and April 1, 2011, as for the installer of all "ceremony tray water tanks under the ground", undergoing an examination of examination with management situation was required once for fixed period within one year.
The details (page of information about the regulations revisions such as small scale tray water tank water supply)
About inspection organization,
・Water supply registration inspection engine temporarily exclusive in the case of temporarily exclusive water supply
・Inspection engine simple water supply Channel-designated in the case of small scale tray water tank water supply small scale tray water tank water supply
You have you choose among this freely, and please have an examination by inspection.
In addition, please refer to inspection organization for inspection rate (not certain rate.) .

Contents of inspection

By examination for management situation, we check the following item.

  • The situation around the water tank
  • The situation of the water tank body
  • State of the upper water tank
  • State in water tank
  • State of manhole
  • State of overflow pipe
  • State of ventilation pipe
  • State of draining off pipe
  • States such as service pipes
  • Simple examination of water (odor, taste, color, chromaticity, turbidity, residual chlorine) in feed cock
  • State of rearranging of documents and preservation
≪Temporarily exclusive water supply registration inspection engine≫
Engine nameTelephoneFax
Association of Kanagawa preventive medicine045-773-6444045-775-3185
Kitasato environmental science center042-778-9208042-778-4551
Association of Kanagawa health045-661-0975045-671-1737
The House of Tokyo microscope042-525-3186042-525-3924
Japan environmental hygiene center044-288-5225044-288-4901
Yokohama environment center045-439-3320045-433-5466
Association of Kanagawa water tank0467-83-0605020-4662-1176
Koto microorganism research institute03-3671-594103-3672-1052
Physics and chemistry service in Japan03-6892-050503-6892-0200
Japan analysis03-5914-443103-5914-4432
Kanagawa water, energy service042-768-4222042-768-4230

※We publish inspection organization concluding Yokohama-shi and agreement as water supply management conformity facility indication system agreement organization.
Besides, as for the details, please see Ministry of Health, Labour and Welfare Channel section WEB site (the outside site) as there is medium which inspection of temporarily exclusive water supply is available for.

≪Small scale tray water tank water supply, simple water supply Channel-designated inspection organization≫
Engine nameTelephoneFax
Association of Kanagawa health045-661-0975045-671-1737
Association of Kanagawa preventive medicine045-773-6444045-775-3185
Yokohama environment center045-439-3320045-433-5466
Association of Kanagawa water tank0467-83-0605020-4662-1176
Kitasato environmental science center042-778-9208042-778-4551
Japan environmental hygiene center044-288-5225044-288-4901
Koto microorganism research institute03-3671-594103-3672-1052
Japan analysis03-5914-443103-5914-4432
Kanagawa water, energy service042-768-4222042-768-4230

Report after having had an examination by inspection

From April 1, 2011, as for the installer of small scale tray water tank water supply (effective capacity of cistern to receive "is more than 8 cubic meters" all "type we receive water tanks under the ground") and simple water supply water supply, it was obliged examination for management situation to after the undergoing an examination reporting test result to the mayor immediately.
The details (page of information about the regulations revisions such as small scale tray water tank water supply)

In addition, it is necessary to report the result to Director health with or without inappropriate matter after installer of temporarily exclusive water supply has an examination by examination for management situation.

[report style]

Conduct, report of self-check

Installer of small scale tray water tank water supply (except "ceremony tray water tanks under the ground") that was with 8 cubic meters or less of effective capacity of cistern to receive from April 1, 2011 checked facility after the cleaning conduct and was required to report test result to the mayor immediately.
The details (page of information about the regulations revisions such as small scale tray water tank water supply)
[report style]

About water supply management conformity facility indication system

In Yokohama-shi, we authorize facility having good result of periodical inspection of the management situation as "water supply management conformity facility" and issue seal from registration inspection engine which bound Yokohama-shi and agreement together in deadline for water supply management conformity facility indication mark (plate) and indication.
Water supply management conformity facility indication mark (plate) comes to be able to post on entrances of facility so that it turns out that it has good management situation to user or users.

Water supply management conformity facility authorized mark

Deadline for water supply management conformity facility authorized mark and indication seal

About prior instruction at the time of tank design construction to receive

When we perform time or setting alternate establishing cistern, kookisuiso to receive newly, about setting place of water tank and structure of water tank, we perform prejudging with drawing.
You are before before building certification application or water supply equipment construction application (case without building certification application), and please refer to Health and Welfare Center Health Sanitation Division of ward to install cistern to receive in.
In addition, drawings necessary for examination are as follows.

  • Plan of building
  • Ground plan of water tank and elevation
  • Ground plan of water tank setting place and elevation
  • Water supply and drainage distribution diagram
  • Water supply check

Simple water supply water supply is private water supply except exclusive water supply which assumed groundwater water source.

(reference) The regulations Article 2 Paragraph 1 5 about securing of drinking water which is hygienic by security in Yokohama-shi simple water supply water supply and small scale tray water tank water supply
Simple water supply water supply: It is water supply except water supply to offer for one of water supply business and exclusive water supply, and it is said with thing to supply drinking water to with groundwater as water source. But we remove thing to supply to one house exclusively.

About installation construction confirmation application of simple water supply water supply

When we perform installation construction, installation construction confirmation application is necessary beforehand.
Please consult to Health and Welfare Center Health Sanitation Division of facility location ward.

About examination of water

Item of necessary examination of water and frequency changed in the simple water supply water supply by the regulations enforcement regulations about securing of hygienic drinking water having been revised by security in Yokohama-shi simple water supply water supply and small scale tray water tank water supply on June 25, 2014.
Installer of simple water supply water supply makes examination of water plan in consideration for tap water source or the neighboring situation before start of every fiscal year, and it is necessary to carry out examination of water based on the plan.

About inspection of cleaning and the management situation

Simple water supply water supply is obliged to carry out one cleaning and inspection of the management situation every less than one year.
About inspection of the management situation, you have you choose among << small scale tray water tank water supply, simple water supply Channel-designated inspection organization >> mentioned above, and please have an examination by inspection.
In addition, please refer to inspection organization for inspection rate (not certain rate.) .
After having an examination by inspection of the management situation, please submit simple water supply water supply undergoing an examination debrief report (word: 39KB) to Health and Welfare Center Health Sanitation Division of facility location ward immediately.

About well water

Many wells are in Yokohama-shi and are used for life water such as sprinklings. In addition, for reason, "drinking from the old days" "is delicious", citizen's drinking for taste is in a part.
However, in Yokohama-shi that urbanization went ahead through, well water and spring might be polluted by management such as penetration or well of various toxic substances under the ground being insufficient, and, also, the quality of the water may change by weather in season.
To always adapt well water to water supply standard of water (51 items (outside site)), and to use for drinking, chlorination is high; water-treat and maintenance of that purpose is necessary. In addition, improvement of the quality of the water may be difficult.
As water supply is almost maintained in the whole area, in Yokohama-shi, well water does with life water except drinking and recommends that water supply is used for drinking water.
In addition, please refer to Water Works Bureau customer Service Center (telephone 045-847-6262, fax 045-848-4281) or Water Works Bureau water supply maintenance section for laying of water supply.

About well for disaster emergency

In Yokohama-shi, it recruits wells (well for disaster emergency) providing to local people as life water such as lavation at the time of disaster as "securing of life water at the time of disaster".
For details, please see this (page of information about hygiene measures at the time of disaster).

In Yokohama-shi, cistern to receive by expansion of direct connection water distribution system aims at reduction of providing equipment.
Water of water pipe comes to be supplied to faucet directly by changing to this direct connection water distribution system in building and apartment where tank method to receive using cistern to receive is adopted.
In addition, because cistern to receive becomes needless, maintenance management fee such as cleaning decreases, and it becomes possible to utilize setting place effectively.
In addition, from July 1, 2010, we will introduce method with kookisuiso as direct connection water supply from water pipe newly.
About the details (improve the issue of hygiene of cistern to receive! Direct connection-style water supply to kookisuiso in tray water tank type building of ... existing is enabled. Please see ...) (the outside site).

Summary of direct connection water distribution system

"Direct connection direct pressure water distribution system" that does not install zooshi pump with direct connection water distribution system, and is water-suppliable to the fourth floor and zooshi pump ※Although it is necessary to install this, there is quite water-suppliable "direct connection increase pressure water distribution system" to the 15th floor, around 200 households.
※Installer of zooshi pump burdens customer (user).

About direct connection water distribution system and tank method to receive

For water distribution system of building, there is tank method to receive which installs direct connection water distribution system to supply with water using the water pressure of water pipe and cistern to receive, and supplies with water. As each water distribution system has good point and bad point showing next, it is expected that we consider enough these and adopt the most suitable water distribution system.
For reasons of the deterioration of deterioration and service pipe of cistern to receive, we recommend that we are changed to direct connection water distribution system that apartments where water tank and pump, installation substitute of service pipe are examined are safer, and is hygienic.

About each method
MethodDirect connection water distribution systemTank method to receive
ExplanationDirect connection direct pressure water distribution system (to the fourth floor of building)
Method to supply with water only using the water pressure of water pipe directly
Direct connection increase pressure water distribution system
Method to supply with water by zooshi pump which we installed in the middle of the plumbing of service pipe without establishing cistern to receive
kookisuisohoshiki
Method to draw, and to supply kookisuiso with water in natural, flowing down with water pump after having been stored in cistern receiving water once
Pressurization pump method
Method to supply with water with pressurization pumps without going by way of kookisuiso
MeritAs there is not point to retain 1 water in, hygienic water is supplied by security directly.
Setting space and setting expenses such as 2 tray water tank, pump are unnecessary.
Maintenance management of periodical cleaning of 3 tray water tank and cistern and water pump to receive is unnecessary.
4 energy utilization is possible and can expect saving of electricity bill.
As we can retain water to 1 water tank, we can secure water supply at the time of water pipe water outage to some extent. It is effective for building which always needs water.
We can use a large quantity of water at 2 1:00.
DemeritWe do not turn in building which always needs water to become water supply stop at the time of disaster and water pipe water outage promptly as we cannot retain 1 water.
At the time of decompression water supply accompanied with 2 shortages of water, water may not run smoothly.
Setting space, facilities expenses such as 1 tray water tank, pump facilities are needed.
Periodical maintenance management such as 2 tray water tank, pump facilities is necessary.
Periodical cleaning of 3 tray water tank is necessary and may invite the quality of the water drop if management of cistern to receive is bad.

Reference

Reference
Reference about cistern to receiveHealth and Welfare Center Health Sanitation Division of ward to live
Reference about direct connection water distribution systemWater Works Bureau customer Service Center (Phone: 045-847-6262)
Reference: Homepage of City of Yokohama, Water Works Bureau
Reference about construction construction, estimated costDesignated water supply equipment construction company of neighborhood or Yokohama-shi tubing cooperative (Phone: 045-681-6631, fax: 045-681-4355)
※As you may be charged a fee on estimates, please be careful.

It is water-clear and pours water into glass which does not get dirt and, seeing from the top, may be colored.
Water is water-clear, but may be usually seen blue to let short blue colors of wavelength scatter by light. This is normal, but white water, red water, black water, green water may sometimes flow.
In addition, there may be taste and smell when water colors in the appearance so as to be unfavorable.
As tap water is doing chlorination, we smell of chlorine. This is safe water to be able to drink in peace, but it is unrefined (mixture of filthy water) and is sweet (production of Diatomaceae) and is musty (production of hosenkin, blue green algae) and, other than the chlorine smell, smells of medicine smells (mixture of factory effluent).
Please consult with Water Works Bureau customer Service Center (Phone: 045-847-6262, fax: 045-848-4281) (when we do not know in the case of direct connection water distribution system or water distribution system), Health and Welfare Center Health Sanitation Division (in the case of tank method to receive) if we feel abnormality.

※As smell, taste is hard to feel that water temperature is low, you should smell after warming up to around 40 degrees.

(reference)
Page of Yokohama City Inst. of Health "information about water"
Page of Water Works Bureau

White water flows

White color disappears in a few minutes

If we put to transparent glass taking water into account for a while, and sonant mark disappears from little person, it is all right as air joins and just whitens.

Red water flows

Red water flows only in the morning, and red water flows from specific faucet

As for the red water, service pipe becomes old, and it seems that red iron appeared. Please employ first thing in the morning water as trivial routine duties water without using for drinking.
Construction to change water pipe which became old is fundamentally necessary.

Water bubbles

Bubble goes out in a few minutes

We may bubble when we give water like a brick. It is all right in a few minutes because it depends on what air was drawn into in water when bubble goes out.
In addition, please confirm as detergent is left in container and may bubble after rinsing out well.

Pan and kettle whiten

For mineral included in tap water coming out, we do not have effect for the human body.

Tile and drainer basket change color

Tile and drainer basket may change color in black, purple, pink, but, in this, drop of water which adhered to tiles has atmospheric bacteria and mold, and it is thought that it spread.
When color changes, you wash off in commercial detergent and bleaching agent, and please dry well after having washed.

About examination of water

When examination of water supplier is missing, please ask the next specialized manufacturer.
※The next organization is examination of water organization in the city receiving registration of the Minister of Health, Labour and Welfare.

Examination of water organization
Engine nameTelephone
Euro fin Japan environment045-780-3848
Company general environmental analysis045-929-0033
veoria jienettsu045-752-2421

Electronic brochure

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Health and Social Welfare Bureau health security department Health Sanitation Division

Telephone: 045-671-2456

Telephone: 045-671-2456

Fax: 045-641-6074

E-Mail address [email protected]

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