COMPARATIVE AQI STATUS OF PATNA CITY FROM 01 JAN TO 15 APRIL , 2021

Category 

2017

 

2018

 

2019

 

2020

 

2021-105

Days

2017

2018

2019

2020

2021

Good

(0–50)

2

2

8

58

-

170

178

226

263

25

Satisfactory

(51–100)

77

81

128

114

-

Moderate

(101–200)

91

95

90

92

25

Poor

(201–300)

53

55

23

48

65

174

187

139

103

80

Very Poor

(301–400)

85

108

86

54

15

Severe

(>401)

36

24

30

1

-