Measures to prevent legionellosis in facilities

Yokohama City has established the guidelines for measures to prevent legionellosis in Yokohama City, and has established standards for management of bath facilities, hot water supply facilities, aquascape facilities, cooling towers, and humidifiers in hospitals and social welfare facilities. We conduct on-site inspections. As for the details, please confirm Yokohama-shi Legionellosis prevention measures instruction summary.

• Yokohama-shi Legionellosis prevention measures instruction summary [PDF (PDF: 411KB)]
• "What is Legionellosis? ~ Source of infection and measures to hide close to me ~ "(Leaflet for citizens) (PDF: 6,753KB)
• "Stop! Legionella-Points for Preventing Legionellosis-" (brochure for businesses) (PDF: 1,840KB)

If you have opened a new facility that is subject to the outline, or if you have changed the existing facilities, please contact Health and Welfare Center Health Sanitation Division in your district.

Eligible facilities

• Public baths prescribed in Article 1, Paragraph 1 of the Public Bath Act (Act No. 139 of July 12, 1948)
• Facilities that perform the inn business prescribed in Article 2 of the Ryokan Business Act (Act No. 138 of July 12, 1948)
• Pool prescribed in Article 2, Paragraph 4 of the Ordinance on Kanagawa Beaches (Kanagawa Prefecture Ordinance No. 4 on April 1, 1959)
• Specific buildings prescribed in Article 2 of the Act on Securing a Sanitary Environment in Buildings (Act No. 20 of 1970)
• Hospital, clinics
• Social welfare facilities such as nursing homes for the elderly, nursing homes for the elderly (nursing homes), daycare centers, etc.
• Facilities that conduct the housing accommodation business prescribed in Article 2, Paragraph 3 of the Housing Accommodation Business Act (Act No. 65 of 2017)
• Facilities deemed necessary by the director of the health center

In order to prevent the occurrence of Legionellosis, create a management ledger for the target equipment and an annual management plan for Legionellosis prevention measures and a management implementation report, and perform appropriate maintenance. In addition, it is important to create management records such as cleaning and strive to prevent the occurrence of legionellosis on a daily basis.

• Legionellosis Prevention Measures Annual Management Plan / Management Implementation Report [PDF (PDF: 181KB)] [WORD (word: 40KB)]
• Entry procedure of Legionellosis prevention measures annual management plan, management execution report [PDF (PDF: 412KB)]
• Management record form example [PDF (PDF: 1,128KB)] [EXCEL (Excel: 54KB)]
• Management ledger [PDF (PDF: 1,956KB)] [EXCEL (Excel: 46KB)]

In order to prevent the occurrence of Legionellosis in public facilities used by citizens, please prepare a management ledger for the target equipment and an annual management plan and management implementation report for the prevention of Legionellosis, and submit it to Health and Welfare Center Health Sanitation Division, where the facility is located.
If you have opened a new public facility or have installed a new facility, please contact Health and Welfare Center Health Sanitation Division in the district where the facility is located.
[Contact]
List of consultation desks related to environmental hygiene in Health and Welfare Center Health Sanitation Division

Examples of facilities that require appropriate maintenance stipulated in the Yokohama City Legionellosis Prevention Measures Guidance Guidelines are as follows.
For detailed maintenance procedures and individual facilities, please contact Health and Welfare Center Health Sanitation Division, where the facility is located.
[Contact]
List of consultation desks related to environmental hygiene in Health and Welfare Center Health Sanitation Division

Of the bath facilities where an unspecified number of people take a bath, those that keep the hot water in the bathtub clean by circulating hot water through a filter, and those that circulate for heating are called circulation bathtub equipment. Says. It is a facility where hot water and dirt can easily stay inside the piping, and Legionella spp.
In addition, machine bathtubs (special bathtubs) designed so that even those who have difficulty bathing on their own can take a bath without burden are often complicated structures, and there are various types of things, so equipment instruction manuals etc. Carefully check and proper maintenance is required.

Central circulation type hot water supply equipment is equipment that provides hot water to the entire building by providing hot water supply and return water pipes. Legionella spp. Legionella spp. that accumulates and proliferates at places where the temperature of the hot water drops may spread throughout the facility.

Cooling towers, which are often combined with air conditioners, are easily contaminated by Legionella spp. from outside, and proliferated Legionella spp. are easily scattered around.

Please also see the video explaining the mechanism of the cooling tower.

Aquascape facilities that generate splashes around them, such as fountains, will be contaminated by Legionella spp. If not properly managed, and may be infected with Legionella disease.

If Legionella spp. is detected in the equipment to be managed, or if a user of the facility is found to have Legionellosis or suspected Legionellosis, immediately contact Health and Welfare Center Health Sanitation Division in the district where the facility is located.
In addition, investigate the cause of the growth of Legionella spp., and review the maintenance method to prevent recurrence.

• Legionella spp. test guideline value excess report (reference style) [PDF (PDF: 144KB)] [EXCEL (Excel: 24KB)]

[Contact]

List of consultation desks related to environmental hygiene in Health and Welfare Center Health Sanitation Division

As part of measures against summer heat, mist generators are widely used. Insufficient management of the mist generator may cause infectious diseases due to mist contaminated with bacteria.

Keep the following in mind when managing mist generators and keep them clean.

• Let's use tap water
• Before starting use, clean water tanks, hoses, etc.
• Let's replace the water in the water tank every day.
• During the period of use, periodically check the water tank or hose for slimy or dirt, and clean it if you see slimy or dirt.
• If you do not use it for a long time, drain and clean it and dry it thoroughly.

For specific management methods, also check the instruction manual prepared by the equipment manufacturer.

Do you know it? Hygiene management of mist generator] (PDF: 536KB)