About alert of PM2.5

In accordance with the provisional guidelines, Kanagawa Prefecture provides high-concentration forecasts and high-concentration information in the morning at around 8:00 and high-concentration forecasts in the afternoon at around 13:00.
In addition, for details such as high concentration forecasts carried out by Kanagawa Prefecture, what is the high concentration forecast of PM2.5 in Kanagawa Prefecture? (External site) Please refer to the page.

If the median of all stations of the 3-hour average value from 5:00 to 7:00 at the General Environmental Air Measurement Bureau in Kanagawa Prefecture exceeds 85 μg / m3, a morning alert will be issued around 8:00.

If the highest value of all stations of the 8-hour average from 5:00 to 12:00 at the General Environmental Air Measurement Bureau in Kanagawa Prefecture exceeds 80 μg / m3, an afternoon alert will be issued around 13:00.

Regardless of the criteria for high concentration forecast (warning) in the morning, the hourly value at 5:00, 6:00, and 7:00 at the General Environmental Air Measurement Station in Kanagawa Prefecture exceeds 85 μg / m3 at any measuring station If so, we will provide information on our website.

The alerting method implemented by Kanagawa Prefecture is different from the method recommended by the Ministry of the Environment and the following two points.

1. Judgment of alerting in the morning is based on the initial "median value" before the review, not the "next high value" after the review.
2. In principle, cancellation of alerting will not be carried out.

In Yokohama City, if there is a high concentration forecast for Kanagawa Prefecture, we will respond promptly as follows.

1. We will immediately notify the registrant via e-mail in disaster prevention information, Yokohama City.
2. We inform ward or related bureaus, and in these wards or related bureaus, we contact facilities such as schools in charge and alert users of facilities.

When a high-concentration forecast is issued.

• Let's reduce unnecessary and urgent outings as much as possible.
• Let's reduce the amount of intense exercise outdoors for a long time.
• Indoor ventilation and opening and closing windows should be kept to a minimum.
• If you are small, older, or have respiratory or circulatory diseases, pay attention to changes in your physical condition on the day and move more carefully.

To date, no alert has been issued in Kanagawa Prefecture.