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Self-measurement of indoor air quality

Number of measurement
  • Maintenance standard: Once a year
  • Recommendations: Once every two years
Multi-Use Facility
  • 1. Application Subject
Total Area Applied facilities
Over 300m2 Internet Computer Game Facility (PC Room)
Over 430m2 National and Public Child Care Center, Corporate Child Care Center , Workplace Nursery and Private Child Care Center.
Over 500m2 Postpartum care center
Over 1000m2 Elderly Care Facility, Funeral Facility(underground location facilities), Private Institute, and Public Bath Facility
Over 1500m2 Passenger Terminal
Over 2000m2 Underground Shopping Center, Rail Station Waiting Room, Passenger Terminal Waiting Room, Medical Institution (or more than 100 beds), Exhibition Facility (in-house), Indoor Parking Lot (except mechanical parking lots), or Buildings used for two or more purposes
Over 3000m2 Library, Museums, Art Museums, Office Facilities
Over 5000m2 Port Facility Waiting Room
Others Every Underground Subway Stations
Every Large-scale Store
Every Movie Theater(Only for indoor movie theaters)
Indoor Concert Hall with more than 1,000 seats
Indoor Sports Facilities with more than 1,000 seats
  • This refers to the sum of the floor area of a single building on the land, including the ground floor, underground floor, and parking facilities.
  • Measurement period: Underprivileged facilities (medical institutions, elderly care facility, postpartum care centers, child care centers) - 7/1-12/31 | The rest of facilities – 1/1-6/30
  • 2. Maintenance standard of indoor air quality
  • Until June 30, 2019, | Enforcement Rules of Indoor Air Regulation [Appendix 2] (Amended 2016 12.22)
Maintenance standard of indoor air quality (Article 3)
Division Fine Dust (PM-10)
(μg/m3)		 CO2
(ppm)		 Formaldehyde
(μg/m3)		 Total Bioaerosol
(CFU/m3)		 CO
(ppm)
A. Underground Subway Stations, Underground Shopping Center, Rail Station Waiting Room, Passenger Terminal Waiting Room, Port Facility Waiting Room, Passenger Terminal in Airport, Library·Museum and Art Museum, Large-scale Store, Funeral Facility, Movie Theater, Private Institute, Exhibition, Internet Computer Game Facility, and Public Bath Facility Under 150 Under1,000 Under2,100 - Under210
B. Medical institutions, Postpartum care centers, Elderly care facility, Child care centers Under100 Under800
C. Indoor Parking Lot Under200 - Under25
D. Indoor Sports Facility, Indoor Concert Hall, Office Facility, Buildings used for two or more purposes Under 200 - - - -
  • From 1 July 2019 | Enforcement rules of the Indoor Air Regulation [Appendix 2] (Amended 2018. 10. 18)
Maintenance standard of indoor air quality (Article 3)
Sort Fine Dust (PM-10)
(μg/m3)		 Fine Dust (PM-2.5)
(μg/m3)		 CO2
(ppm)		 Formaldehyde
(μg/m3)		 Total Bioaerosol
(CFU/m3)		 CO
(ppm)
A. Underground Subway Stations, Underground Shopping Center, Rail Station Waiting Room, Passenger Terminal Waiting Room, Port Facility Waiting Room, Passenger Terminal in Airport, Library·Museum and Art Museum, Large-scale Store, Funeral Facility, Movie Theater, Private Institute, Exhibition, Internet Computer Game Facility, and Public Bath Facility Under 100 Under 50 Under 1,000 Under 100 - Under 10
B. Medical institutions, Postpartum care centers, Elderly care facility, Child care centers Under75 Under35 Under80 Under800
C. Indoor Parking Lot Under200 - Under100 - Under250
D. Indoor Sports Facility, Indoor Concert Hall, Office Facility, Buildings used for two or more purposes Under200 - - - - -
  • 3. Recommendation of indoor air quality
A. Underground Subway Stations, Underground Shopping Center, Rail Station Waiting Room, Passenger Terminal Waiting Room, Port Facility Waiting Room, Passenger Terminal in Airport, Library·Museum and Art Museum, Large-scale Store, Funeral Facility, Movie Theater, Private Institute, Exhibition, Internet Computer Game Facility, and Public Bath Facility
Maintenance standard of indoor air quality (Article 3)
Division Nitrogen dioxide
(ppm)		 Radon
(Bq/m3)		 Total volatile organic compounds
(μg/m3)		 Ultrafine particles(PM-2.5)
(μg/m3)		 Mold
(CFU/m3)
0.05 Under148 Under500 - -
B. Medical institutions, Postpartum care centers, Elderly care facility, Child care centers Under400 Under70 Under500
C. Indoor Parking Lot Under0.30 Under1,000 - -
  • From 1 July 2019 | Enforcement rules of the Indoor Air Regulation [Appendix 3] (Amended 2018. 10. 18)
Recommendation of indoor air quality(Article 4)
Sort Nitrogen dioxide
(ppm)		 Radon
(Bq/m3)		 Total volatile organic compounds
(μg/m3)		 Mold
(CFU/m3)
A. Underground Subway Stations, Underground Shopping Center, Rail Station Waiting Room, Passenger Terminal Waiting Room, Port Facility Waiting Room, Passenger Terminal in Airport, Library·Museum and Art Museum, Large-scale Store, Funeral Facility, Movie Theater, Private Institute, Exhibition, Internet Computer Game Facility, and Public Bath Facility Under0.1 Under148 Under 500 -
B. Medical institutions, Postpartum care centers, Elderly care facility, Child care centers Under400 Under500
C. Indoor Parking Lot Under0.30 Under1,000 -
Apartment Houses
  • 1. Application Subject
  • The constructor of a newly constructed apartment house shall measure the indoor air quality of the completed apartment and submit the results of the measurement, and post the results to a well-viewed place for residents before moving into the apartment. (Article 9, Clause 1 of Enforcement Rules of Indoor Air Regulation)
    1. Entrance Board of Apartment Management Office
    2. Bulletin board at the each entrance of apartment building.
    3. The constructor's Internet homepage (Article 7, Clause 4 of Enforcement Rules of Indoor Air Regulation)
Type Definition Size
Apartment Five-story or higher apartment building 100 households or more
Duplex house Duplex less than four-story is exceeding 660 m2, the total floor area per a building
Dormitory Facilities that are attached to schools, workplaces, factories, etc. to provide accommodation and lodging for students or employees
  • 2. Recommendation Standard
Items Standard
Until June 30, 2019 From 1 July 2019
Formaldehyde Under210μg/m3
Benzene Under30μg/m3
Toluen Under1000μg/m3
Ethylbenzene Under360μg/m3
Xylene Under700μg/m3
Styrene Under300μg/m3
Radon Under200Bq/m3 Under148Bq/m3
School
  • 1. Definition of School
  • Kindergarten under Article 2 of the Childhood Education Act, and Schools under the provisions of Article 2 of the Elementary and Secondary Education Act and Article 2 of the Higher Education Act.
  • 2. Types and period of inspection of environmental hygiene and food hygiene in school
Inspection Type Inspection Period
Daily inspection Every class day
Regular inspection Every school year: One or more times (in the case of air quality hygiene inspections according to Article 4 Clause 1 of the Act, one or more times in the first half and the second half of the year).
Special inspection - When a patient occurs collectively due to an infectious disease, etc. or when it concerned
- When the environment becomes unclean or contaminated due to wind and flood damage
- When a new school is built, refurbished, rebuilt, or when new materials such as desks, chairs, and computers are brought into the school, which may result in formaldehyde and volatile organic compounds.
- And when the head of the school admits he needs it.
  • NOTE: In the case of regular inspection of radon among contaminants pursuant to Annex 4-2, regular inspection cycles may be increased as provided by the Minister of Education for the first floor classroom, where the inspection results for the first and subsequent years are less than 50 percent of the maintenance standards, respectively.
  • 2-1. Period and number of regular inspections by inspection item
Sort inspection item Emphasized inspection Annual inspection frequency Note
1 Ventilation Winter At least once  
2 Daylighting (natural lighting) and lighting (artificial lighting) Winter At least once  
3 Indoor Temperature and Humidity Seasonal At least four times  
4 Noise Summer At least once  
5 Air quality in school, etc      
5-1 Fine dust(PM10) Winter At least once  
5-2 CO Winter At least once  
5-3 Formaldehyde(HCHO) Summer At least once  
5-4 Total bioaerosol Summer At least once  
5-5 Falling bacteria Summer At least once Nurse's office, cafeteria
5-6 CO Winter At least once Direct fired heating classroom and roadside classroom
5-7 NO2 Winter At least once
5-8 Radon - At least onc Classroom lower than first floor
5-9 Total volatile organic compounds(TVOC) Summer At least on Classes within 3 years after new construction (extended/rebuilt)
5-10 Asbestos - At least once Classroom equivalent to asbestos buildings under the latter part of Article 22 Clause 1 of the Asbestos Safety Management Act
5-11 Ozone Winter At least once Teachers' room, Administration room
5-12 Mites(including mites allergens) Summer At least once Nurse's office
6 Waste Summer At least twice  
7 Canteen and cafeteria Summer At least twice  
8 Drinking water Seasonal At least four times  
9 Water and sewage Summer At least once  
10 Restroom Summer At least four times  
11 Other matters concerning environmental hygiene Summer At least four times  
  •  
    3. Standard for maintenance and management of air quality, etc. (Article 3 Clause 1 subclause 3 sub 2)
  • 3-1. Maintenance standard
Pollutant Item Standard(below) Applied Facility Note
A. Fine dust 35μg/m3 Every classroom Dust less than 2.5 μm in diameter
100μg/m3 Every classroom Dust less than 10 μm in diameter
B. CO2 1,000ppm Every classroom Less than 1,500 ppm when the classroom is ventilated by mechanical ventilation
C. Formaldehyde 100μg/m3 Every classroom  
D. Total Bioaerosol 800CFU/m3 Every classroom  
E. Falling bacteria 10CFU/room Nurse's office, cafeteria  
F. CO 10ppm Individual heating classroom and roadside classroom Heating classrooms are limited to direct fired heating classes
G. NO2 0.05ppm Individual heating classroom and roadside classroom Heating classrooms are limited to direct fired heating classes
H. Radon 148Bq/m3 Classroom lower than first floor  
I. Total volatile organic compounds 400μg/m3 School within 3 years after construction Including extension and renovation
J. Asbestos 0.01/cc School equivalent to asbestos buildings under the latter part of Article 22 Clause 1 of the asbestos safety management act  
K. Ozone 0.06ppm Teachers' room, Administration room Only if there are office equipment (e.g. photocopiers) that produce ozone within the applicable facility.
L. Mites 100/m2 Nurse's office  
  • 3-2. Management standard
Object facility Critical control point
A. New School 1) Do not use construction materials that emit pollutants in accordance with Article 11 clause 1 of Enforcement Rules of Indoor Air Regulation
2) Ventilation system should be installed for smooth ventilation in school
3) For school supplies such as desks, chairs, and tops, use products certified as Korean Industrial Standards pursuant to Article 15 of the Industrial Standardization Act
4) To ensure that formaldehyde and volatile organic compounds in the school comply with the maintenance standards, investigate and use the necessary measures
B. School within three years of its opening Formaldehyde, volatile organic compounds, etc. shall be managed in priority to comply with the maintenance standards
C. School more than ten years after its opening 1) Fine dust and bioaerosol shall be managed in priority to comply with the maintenance standards
To renovate or repair an existing facility, do not use construction materials that emit pollutants in accordance with Article 11 clause 1 of Enforcement Rules of Indoor Air Regulation
3) For school supplies such as desks, chairs, and tops, use products certified as Korean Industrial Standards pursuant to Article 15 of the Industrial Standardization Act
D. School equivalent to asbestos buildings under the latter part of Article 22 Clause 1 of the Asbestos Safety Management Act Asbestos shall be managed in priority to comply with the maintenance standards
E. Individual heating(only direct fired heating classes) classroom and roadside classroom CO and NO2 shall be managed in priority to comply with the maintenance standards
F. Cafeteria 낙Falling bacteria shall be managed in priority to comply with the maintenance standards
G. Nurse's office Falling bacteria and mites shall be managed in priority to comply with the maintenance standards
  • 4. Measurement Location and measurement method by item
Item Location Method
Ventilation Classroom during the lesson Measure the accumulation of CO2 at intervals of 15 minutes during class by CO2 measuring device
Temperature and Humidity Classroom during the lesson, Outdoor Air Measure with an Assmann ventilated psychrometer(Standard Method) or a Digital Temperature and Humidity System
Lighting Empty classroo Measure the illumination levels of the blackboard and classroom at least 9 locations by a light meter conforming to photocell illuminometer (KSC 1601) (at this time, measure at 75 cm from the floor
Noise Empty classroom, Outdoor air Average measurement at 1 m in the classroom window and 1 m in the corridor at a height of 1.2 m to 1.5 m from the floor by a noise meter in Class 2 as specified in KSC IEC61672-1.
Fine dust(PM10) Classroom during the lesson, Outdoor Air Measure by the measuring instrument that field measurements is possible/Measure with small air sampling if required.
Ultrafine particles(PM2.5) Classroom during the lesson, Outdoor Air -Measurements using the weight method and the beta-ray absorption method are first taken 24 hours, but light scattering method can be measured by considering the approval progress of the equipment (if measured by the light scattering method, the average value shall be calculated after measuring 5 times or more at a certain time interval according to the user manual of the equipment).
For measuring methods (weight method, beta radiation absorption method), which apply the daily average reference, it is recommended that the measuring place (classroom number) is one or more places in the facility, but for other measurement methods (mining method), three or more places ※ However, if there are 10 rooms or less, the number of measuring classes is more than one
CO2 Classroom during the lesson, Outdoor Air Measure with a field direct reading measuring instrument applied non-dispersive infrared analysis
CO Roadside classroom, individual heating classroom Measure by the measuring instrument that field measurements is possible/Measure with 2,4-DNPH derivatization HPLC analysis if required.
NO2 Roadside classroom, individual heating classroom Measure by the measuring instrument that field measurements is possible/Measure with non-dispersive infrared analysis if required.
Total Bioaerosol Classroom during the lesson(including Nurse's office, cafeteria) Collision method
Formaldehyde(HCHO) Empty classroom Measure by the measuring instrument that field measurements is possible/Measure with 2,4-DNPH derivatization HPLC analysis if required.
Total volatile organic compounds(TVOC) Empty classroom Temperature Thermal Desorption GC-MS/FID analysis using Solid Absorption Thermal Desorption
Asbestos Empty classroom Measure with a phase microscope and measure with an electron microscope when exceeding the standard.
Radon Classroom lower than first floor -When measuring radon concentration with continuous short-term measurement, calculate the average concentration in the time zone (one hour before school ~ one hour after school) where students and employees live
-If the results measured with the 1st passive long-term measurement method exceed 148Bq/m3. perform the second measurement with continuous short-term measurement method.
-Underground classrooms are measured as a rule among school classrooms, but if there is no underground classrooms, classrooms on the first floor must be measured.
Mites Nurse's office Microscopic counting, Enzyme immunoassay (ELISA method), Simplified mensuration(kit for mites inspection)
Falling bacteria Nurse's office, cafeteria Standard agar medium
Ozone Computer room, Teachers' room, Administration room Measure by the measuring instrument that field measurements is possible/Measure with ultra violate photometric method if required.
Office air quality
  • Ministry of Employment and Labor Notice No. 2015-43 Guidelines for Office Air Management
     
  • 1. Pollutant Management standard
  • In order to maintain pleasant office air, the business owner shall manage office pollutants according to the following standards..
Pollutants Management standard
Fine dust(PM10) Under150 μg/m3
CO Under10 ppm
CO2 Under1,000 ppm
Formaldehyde(HCHO) Under120 μg/m3(or 0.1 ppm)
Total volatile organic compounds (TVOC) Under500 μg/m3
Total Bioaerosol Under800 CFU/m3
NO2 Under0.05 ppm
Ozone(O3) Under0.06 ppm
Asbestos 0.01 ea/cc Under
  • Note 1) Management standard: 8 hours accumulated average concentration standard
  • Note 2) PM10: Particle Matters. Dust with a diameter of 10μm or less
  • Note 3) CFU/m3: Colony Forming Unit. The number of colony-forming bacteria in 1m3
     
  • 1-1. Ventilation standards for offices
  • In an office equipped with air purifying facilities, the minimum amount of outside air required for each worker is more than 0.57 cubic meters per minute, and the number of ventilation shall be more than four times per hour.
     
  • 1-2. Measurement of office air quality, etc.
  • The measurement period, number of times, and sampling time of office air shall be compliant with the following criteria
Pollutant Measurement period Sampling time
Fine dust More than once a year During business hours
- Measure continuously for more than 6 hours
CO More than once a year 1 hour after work begins and 1 hour before closing
-Measure continuously for more than 6 hours
CO2 More than once a year 2 hours after work begins and 2 hours before closing
- Measure for 10 minutes each.
Formaldehyde More than once a year and before moving into the new building(including heavy repair) During business hours
-Measure continuously for more than 6 hours
Total volatile organic compounds More than once a year and before moving into the new building(including heavy repair) 1 hour after work begins ~ 1 hour before closing
- Measure twice for 30 minutes.
Total Bioaerosol More than once a year 1 hour after work begins ~ 1 hour before closing
-Measure once at maximum indoor temperature
NO2 More than once a year 1 hour after work begins ~ 1 hour before closing
- Measure for an hour
Ozone More than once a year During business hours
-Measure continuously for more than 6 hours
Asbestos Facility containing asbestos or before moving into a building after dismantling and repairing it. Before moving in after completion of construction
-Measure continuously for more than 6 hours