Information about hygiene measures such as at the time of disaster

It is site of Yokohama-shi public health center health security department Health Sanitation Division here. We provide disaster and information about hygiene measures at the time of flood.

• About well for disaster emergency

• Hygiene measures and disinfection method at the time of flood

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".

When, in such as owners of well, you can provide as life water at the time of disaster
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We report to Health and Welfare Center Health Sanitation Division of ward with well
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Investigation into well by the Health and Welfare Center Health Sanitation Division staff (attendance such as owners is necessary.)
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When we meet designated requirements, we appoint as well for disaster emergency※
When we do not meet designated requirements, we give an advice by improvement of facility
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When we meet designated requirements, is appointed as well for disaster emergency by improvement※
※In the case of designation, I hand well-designated notification for disaster emergency, "house of well cooperation for disaster" plate.

About structure of the quality of the water and well of well water, we appoint well meeting constant requirements as well for disaster emergency to have you inflect as life water such as lavation at the time of disaster sanitarily.
Designated requirements are as follows.

We appoint owner or well (spring) in Yokohama-shi where manager is to confirm that we manage every day.

Standard of the quality of the water to set of summary, standards of structure of well are as follows.

When is appointed in well for disaster emergency, well owner full name, the location of well are published in well list for disaster emergency that Yokohama-shi issues.
This list is deployed in evacuation shelter and Neighborhood Associations, Neighborhood Association, window of ward office to have you inflect at the time of disaster.
When it is obtained consent about the location of well, owner full name being announced as list can read anyone, we appoint as well for disaster emergency.

In the case of designation for disaster emergency, I hand three of next toward the owners.
○"House of well cooperation for disaster" plate
⇒We post on place (place that it is easy to look, for example, at from road including the gate) where neighborhood is easier to find.

"House of well cooperation for disaster" plate

○"Instructions of well for disaster" plate
⇒We post on place that it is easy to look at when people of well use well water.

"Instructions of well for disaster" plate

※Mention contents of "instructions of well for disaster" plate are as follows.
[instructions of well for disaster]
When, at the time of disaster, we use well water
○You inspect well water with distributed examination of water reagent, and please confirm that there is not toxic substance.
(usage of examination of water reagent is listed in manual.)
○We use well water as life water, and drinking water, please use drinking water supplied in evacuation shelter and stored thing.
Everyday management
○You serve as the quality of the water maintenance and check such as pumps, and please draw well water more than once a week.
○Please always keep well and the people clean.
<Yokohama-shi>

○Simple examination of water reagent (litmus paper for examination for pH level, with instruction book) which inspects toxic substance
⇒Owners have you keep and use to confirm that well water which we drew after the disaster occurrence does not have influence of toxic substance.

Litmus paper, instruction book for examination for pH level

As we may investigate the around simple examination of water to confirm the quality of the water situation and well situation, I would like cooperation. (I will inform before investigation.)

I would like everyday hygiene management to utilize well water for at the time of disaster safely.

It is important to usually perform check about kara, well water and the well neighborhood to keep the cleanliness degree of well, and to apply well water in at the time of disaster safely.
In reference to the next checkpoint, we will check.

Garbage or filth enter well when we do not block up, and well water may be polluted.
When we do not block up, it will prevent closing the cap (for covering the top), and garbage from entering.

When canned oil or detergent are put on the cover of well, well water may be polluted when cover was damaged.
We prevent us from putting thing on the cover, and let's keep clean.

Rainwater enters well even if we keep clean over cover of well when there is crack on cover.
Crack garu case will repair on cover of well.

When heavy rains fell, in the well having low setup, filthy water might flow into well.
It will prevent filthy water from flowing in for arranging setup in well when (15cm or more) does not have enough setup.

When there are "garbage, filth, stagnant water" around well, it causes pollution of well water.
Let's keep "rearranging, order, cleanliness" in mind.

When septic tank around the well, drainage trout are damaged, filthy water leaks from there and may get mixed with well water.
When there are these facilities in near the well body (less than 5m degree), we warn management of facilities enough, and let's confirm that filthy water does not leak regularly.

We have you draw well water regularly, and color becomes dull in water, and let's confirm that there is not abnormality such as smells.
※Well for disaster emergency is aimed for use as life water. We recommend that channel is used to drinking water.
(reference: page of information "well water" about hygiene management of tray water tank)

We can download registration form of application when we propose designation of well for disaster emergency, change of well for disaster emergency or the abolition.
Application (report) point of documents becomes Health and Welfare Center Health Sanitation Division of ward with well.

• Of designation of well for disaster emergency report (word: 31KB)
• Of well installer change for disaster emergency or designated cancellation report (word: 30KB)

• Summary (PDF: 124KB) about securing of life water which is hygienic by security at the time of Yokohama-shi disaster
• The summary acting director point (PDF: 147KB) about securing of life water which is hygienic by security at the time of Yokohama-shi disaster

The number of the facilities of well for disaster emergency in Yokohama-shi of April 1, 2020 is 2,316 facilities.
Breakdowns of distinction are as follows.

When there are typhoon or torrential rainfalls, flood may take place.

When road surface is flooded for at the time of heavy rain, the sewer may flow backward. When houses are flooded by such filthy water as filthy water may get mixed with the sewer, you remove dirt by cleaning enough, and please sterilize. (if there is not, disinfection cannot show effect after the cleaning.)
When rainwater is flooded in the situation that road surface is not flooded, it is enough as hygiene measures, but disinfectant work may be necessary if we wash with tap water well as filthy water may get mixed depending on the local situation.

When houses are flooded, please perform cleaning and hygiene measures as follows.

1. Please put around the house or unnecessary thing or sludge in floor bottoms in order.
2. Floor bottom absorbs water with dustcloths, and you ventilate by electric fans forcibly, and please try for drying.
3. Please put unnecessary things in wet tatami mat and house in order after water went down.
4. You wet-wipe with dustcloth, and please do whether dirty furniture or floor, wall wash away with water.
5. Tableware or kitchen utensil flush, and please wash away dirt neatly.
6. Cupboard or refrigerator, please wipe off dirt neatly.

1. Please put around the house or unnecessary thing or sludge in floor bottoms in order.
2. Floor bottom absorbs water with dustcloths, and you ventilate by electric fans forcibly, and please try for drying.

1. When you feel abnormality to tap water, please connect with Water Works Bureau office of ward to live.
2. Please use cistern to receive after checking security and hygiene, and confirming.
3. Please discard food which soaked in water and cold storage required, frozen foods which preservation temperature was not able to keep by blackout as much as possible.
4. Please have a medical examination with medical institution early if you feel abnormality to body.
5. As for in front of meal or the next of bathroom use, please wash hand well.

When you sterilize, please purchase disinfector at drugstore of neighborhood. When drugstore is unclear, please contact "Yokohama-shi prevention of epidemics measures representative contact drugstore" (Yokohama-shi pharmacist society).
When disinfector uses excessively, we may affect someone's health and environment. It will be said that use is minimum. In addition, in the case of use, please be careful not to have accident according to instruction manual.

◎10% of reverse soap

0.1% of use density (we weaken medicinal solution with water to be increased by 100-fold)
We are suitable for sterilization of furniture or floor. You dip into dustcloth, and please wipe. (please avoid use to rubber product)

◎6% of sodium hypochlorite (home chlorine-based bleaching agent)

0.02% of use density (we weaken medicinal solution with water to be increased by 300-fold)
We are suitable for sterilization such as eating and drinking appliances. After having dipped into medicinal solution for around five minutes, please wash in water. (we cannot use for metal)

When cleaning with tap water is enough, disinfection may need hygiene measures when houses were flooded by the situation of the inundation.
When you have a problem, please consult about things about disinfection such as judgments of the need of disinfection to Health and Welfare Center Health Sanitation Division of ward to live. We judge the need of disinfection after we perform field work, and the staff of Health and Welfare Center confirmed the situation and support disinfectant work.

• Hygiene measures and disinfection method (PDF: 410KB) at the time of flood