Clean Air Measures

At SBS Chiangmai, students’ health and safety is our top priority. Recognising that outdoor air quality can sometimes be challenging in Chiangmai, all Kindergarten and Primary classrooms are equipped with individual air purifiers. We have also installed PM 2.5 air purification filters in all of our classrooms and learning spaces to improve the air quality to a safe level so that students are alert and able to fully focus on their learning.

AQI Policy and Practice

Our Early Years and Primary School response to the AQI is more restrictive than that for Secondary School because medical evidence indicates that very young children are more vulnerable to the effects of particulate pollution than older children and adults. When the AQI is over 200, all Early Years and Primary students will be kept indoors. Where the AQI is between 150 and 199, consideration will be given to allowing the children a shortened period of outdoor play. The threshold for Secondary School students is 225. Where the AQI is between 200 and 224, consideration will be given to allowing students a shortened period of outdoor activity. Thresholds for students with respiratory problems are 150 for all students. It is absolutely crucial that parents inform the classroom teacher if their children have respiratory problems, and that parents reiterate these thresholds with their children. Readings are taken at least 3 times every day around our campus and the information supplied to the leadership teams in each school, in order that decisions can be made informed by current circumstances.

Monitoring and Responding to Air Pollution Levels

SBS administration monitors daily air pollution levels as measured using the on-campus Air Pollution Monitor.

When there is elevated air pollution as evidenced by outdoor PM2.5 and PM10 particulate count, the administration informs the teachers and students in a timely manner. Decisions determining which activities are limited or cancelled are made in accordance with the activity
restrictions aligned with the Air Quality Index (AQI) of the Thai Air Quality Index for Particulate Matter.

Teachers and staff are notified in a timely manner if pollution levels require a change in the daily student schedule or to after-school activities. Parents will be notified if the AQI requires a change in school operations.

An in-depth look at the air quality readings for the SBS campus can be seen at


Reducing Student Exposure

In response to AQI readings, SBS takes the following measures to limit student exposure to harmful air pollution:

  1. Classrooms doors and windows are closed and air conditioners are turned on.
  2. Air condition unit air purification filters are regularly cleaned and serviced.
  3. Outdoor recess is cancelled and moved indoors.
  4. PE is moved indoors.
  5. Outdoor ECA’s are cancelled or moved indoors.
  6. Lunch is served in the classrooms.

It is recommended that children come to school wearing a face mask (N95 standard, if possible). Face masks are also available for sale at the school shop. Some parents may wish to keep their children at home on high poor AQI days. If you choose to do so, please inform the school as soon as possible so that plans can be made to provide missed work and attendance can be adjusted accordingly without being marked as absent.

Possible Symptoms of Exposure to Harmful Air Pollution

  • Coughing / sore throat
  • Burning / painful or red eyes
  • Headache
  • Vomiting or nausea

Contact Info


66-87-661-5151 or +66-5344-2208-9



52/347 Muang Ake, Phahonyothin Road., Lak Hok, Mueang, Pathum Thani 12000

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