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Health & Economic Loss
Historical Data
Education
FAQ
About
中文
-
HEI:
-
-
PM
2.5
PM
10
SO
2
NO
2
O
3
-
-
-
-
-
Concentration (µg/m³)
Hedley Environmental IndexSummary
30 Jul 2025 18:27:52
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Clear Days
so far in 2025
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HEI
HEI
PM
2.5
Fine Suspended Particulates
PM
10
Respirable Suspended Particulates
SO
2
Sulphur Dioxide
NO
2
Nitrogen Dioxide
O
3
Ozone
Low
Moderate
High
Very High
Serious
Not Available
Type of Stations:
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