South Korea · The summary is refreshed every 15 minutes.
No current value: fewer than four sensors at different places are reporting now.
Gangneung, November 13, 2026: daily mean PM2.5 14 µg/m³ (4 sensors), level “Moderate” — as in the Atmy Data Hub. Open methodology and data in JSON: Methodology and data sources · JSON
14 µg/m³ Moderate
Daily mean PM2.5 on November 13, 2026 (00:00–24:00 UTC = 09:00–09:00 UTC+9): 14 µg/m³ from 4 sensors that passed the quality check — the same value as in the Atmy Data Hub.
590
IncheonSouth Korea
40SeoulSouth Korea
35BusanSouth Korea
32Cities with the most sensors
All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.
Daily mean PM2.5 of the city sensors, µg/m³
Click a day to see its date and value.
South Korea · City ranking · All pilot cities
Daily mean PM2.5 on November 13, 2026 (00:00–24:00 UTC = 09:00–09:00 UTC+9): 14 µg/m³ from 4 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 41 of 44 cities in South Korea and No. 304 of 675 worldwide, from the most polluted.
Fresh data for Gangneung are insufficient (last update: 13:15 local time, 04:15 UTC). Open the map for the latest readings of individual sensors.
From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.
The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.
The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.
“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.
Source: public Atmy monitoring data. Methodology and data sources · Data terms