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Table data below is obtained with permission from His Majesty's Government,
 Ministry of Population and Environment.
                                                                        
(updated every Tuesday when data is available)


What type of air is called “polluted”?
Air with maximum quantity of dust particles is called polluted air. When dust particles increase, the air is more polluted. When dust particle decreases, the air is less polluted or good in quality.

What is “PM10”?  
PM10 is a measurement unit for dust particles present in the air. In technical terms, PM10 means Particulate Matter with diameter less than or equal to 10 micrometer. Its measurement unit is microgram per cubic meter.

What are the types of air quality?  
There are five levels of air quality depending upon the amount of dust. They are as follows:

Air Quality         Quantity of PM10 (dust)
Good   

Below 60

Moderate   

61 to 120

Unhealthy   

121 to 350

Very Unhealthy   

351 to 425

Hazardous   

          Above 425         

Where are the air quality stations?
Air Quality of Kathmandu Valley is recorded at six stations daily, but the data is compiled on a weekly basis. The six stations are Putali Sadak, Matsyagaon, Tribhuvan University, Bhaktapur, Patan Hospital and Thamel.

Ministry of Environment and Population runs the stations under the assistance of Danish agency, Danida.


Valley air 'unhealthy'                                                                                   What is PM10 ?  

The air quality of Kathmandu valley from January 30 to February 05 was polluted with most of the monitoring stations recording “unhealthy” air pollution levels, according to the data recorded by the Ministry of Environment and Population.

According to the data, the Putalisadak and Matsyagaon area remained the most and the least polluted sites in the Valley.

Weekly air quality report : January 30 - February 05

Date Putalisadak Matsyagaon

Kirtipur

Bhaktapur Patan Hospital Thamel

 2005/01/30

339

46

121

159

350

250

210.83

2005/01/31

385

76

159

203

334

268

237.50

2005/02/01

188

          37

63

110

144

    128

        111.66

2005/02/02

143

27

49

84

168

168

106.50

2005/02/03

172

          37

62

119

207

153

125

2005/02/04

224

 53

62

123

262

131

142.50

 2005/02/05

195

49

     69

113

214

177

136.10

235.14 46.42  83.57 130.14 239.85 182.14

152.87

( * The Kathmandu Valley Weekly Average data is compiled by Nepalnews. Other data obtained from the Ministry of Population and Environment).    

The Putalisadak area recorded a weekly average (based on the daily averages) of 235.14 PM10. The area recorded “unhealthy” and “very unhealthy” air marks for six and one day of the period. The Matsyagaon area recorded “good”  and “moderate” air marks for six and one day of the period with a weekly average of 46.42 PM10. 

Patan Hospital, Thamel, Bhaktapur and Tribhuvan University area (Kirtipur) were respectively the second, third, fourth most polluted sites in the Valley during the period recording weekly averages of 239.85, 182.14, 130.14 and 83.57 PM10 respectively. nepalnews.com pd Feb11 05


Valley air improves                                                                            What is PM10 ?  

The air quality of Kathmandu valley improved from January 9 to 15 as compared to the previous period with five of six monitoring stations recording a fall in pollution levels, according to the data recorded by the Ministry of Environment and Population.

The weekly averages of the air pollution levels (based on the daily averages) showed a decrease the monitoring stations at Putalisadak, Kirtipur (Tribhuwan University area) Bhaktapur, Patan Hospital and Thamel while weekly averages of the air pollution levels at Matsyagaon showed an increase.

Weekly air quality report : January 09 - January 15   

Date Putalisadak Matsyagaon

Kirtipur

Bhaktapur Patan Hospital Thamel

 2005/01/09

245 

59

94

136

216

191

156.83 

2005/01/10

252

65

87

123

227

165

153.17

2005/01/11

254

          32

72

169

213

    181

        155.17

2005/01/12

260

66

102

NA

179

225

186.40

2005/01/13

285

          65

122

NA

328

242

208.40

2005/01/14

299

 81

113

146

293

231

193.83

 2005/01/15

263

77

     111

157

288

200

182.67

266.86 63.57  100.14 104.43 263.43 200.00

167.24 

( * The Kathmandu Valley Weekly Average data is compiled by Nepalnews. Other data obtained from the Ministry of Population and Environment).    

As usual, the Putalisadak area and the Matsyagaon area were the most and least polluted sites in the Valley during the period. The Putalisadak area recorded a weekly average (based on the daily averages) of 266.86 PM10, down from the previous week’s 311.29 PM10. The area recorded 'unhealthy' air marks for all days of the period.

The Matsyagaon area recorded 'good' and 'moderate' air marks for two days and six days of the period respectively with a weekly average of 63.57 PM10. The Matsyagaon area had recorded 56.29 PM10 in the last period.

The Patan Hospital, Thamel, Bhaktapur and Kirtipur area were respectively the second, third and fourth most polluted sites in the Valley during the period recording a weekly average of 263.43, 205.00, 104.43 and 100.14 PM10 respectively.

Data for two days of the Bhaktapur area was not available. nepalnews.com pd Jan 21 05  


Air quality marks improvement in Kathmandu Valley                  What is PM10 ?

The air quality of Kathmandu valley slightly improved from January 02-08 as compared to the previous period with all monitoring stations recording a fall in pollution levels, according to the data recorded by the Ministry of Environment and Population.

The weekly averages of the air pollution levels (based on the daily averages) showed an decrease in all monitoring stations at Putalisadak, Matsyagaon, Kirtipur (Tribhuvan University area) Bhaktapur , Patan Hospital and Thamel

Weekly air quality report : January 02 - January 08   

Date Putalisadak Matsyagaon

Kirtipur

Bhaktapur Patan Hospital Thamel

 2005/01/02

633 

120

318

287

579

481

403.00 

2005/01/03

353

49

91

NA

273

244

202.40

2005/01/04

240

          27

82

117

210

    245

        153.50

2005/01/05

272

43

82

120

261

205

163.83

2005/01/06

258

          51

89

154

267

217

172,67

2005/01/07

224

 49

78

135

221

205

152.00

 2005/01/08

199

55

     88

136

197

185

143.33

311.29 56.29  118.26 158.17 286.86 254.57

 197.58 

( * The Kathmandu Valley Weekly Average data is compiled by Nepalnews. Other data obtained from the Ministry of Population and Environment).    

As usual, the Putalisadak area and the Matsyagaon area were the most and least polluted sites in the Valley, during the period. The Putalisadak area recorded a weekly average of 311.29 PM10, down from the previous week’s 316.57 PM10. The area recorded 'unhealthy' ,'very unhealthy' and 'hazardous' air marks for five days and one day each during the period respectively.  

The Matsyagaon area recorded 'good' and 'moderate' air marks for six days and one day of the period respectively with a weekly average of 56.29 PM10.

The Patan Hospital, Thamel, Bhaktapur and Kirtipur area were respectively the second, third and fourth most polluted sites in the Valley during the period recording a weekly average of 286.86, 254.57, 158.17 and 118.29 PM10 respectively . nepalnews.com pd Jan 13 05

Dec 2004 MOPE


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