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Noise Monitoring

AMBIENT NOISE LEVEL & AMBIENT AIR QUALITY MONITORING DURING DIWALI FESTIVAL 2017

Nagaland Pollution Control Board has been conducting ambient noise level monitoring during Diwali festival regularly for the past few years as per the Central Pollution Control Board directives. This year the ambient noise level monitoring was conducted on pre-Diwali on 12th October 2017 and Diwali on 19th October 2017.

The list of locations where noise monitoring was conducted is given below:

Sl. No. Location address Latitude Longitude Category of Area/Zone
1 Bank Colony 25o 54’ 26.8” N 93o 44’ 06.4” E Residential
2 City Tower 25o 54’ 41.4” N 93o 43’ 13.0” E Commercial
3 District Hospital, Dimapur 25o 54’ 17.5” N 93o 43’ 56.1” E Silence Zone

 

 NOISE LEVEL DURING PRE DIWALI & DIWALI FESTIVAL 2017

Location: Bank Colony

                 (Residential)

Normal Day

(12th October 2017)

Diwali Day

(19th October 2017)

Time Duration Lmin Lmax Leq dB(A) Lmin Lmax Leq dB(A)
18:00 to 19:00 Hr 48.8 73.9 58.6 57.2 96.7 61.7
19:00 to 20:00 Hr 49.6 77.2 55.1 55.2 103.1 59.5
20:00 to 21:00 Hr 48.4 69.6 50.9 58.2 87.6 63.2
21:00 to 22:00 Hr 48.7 71.9 50.2 57.5 97.3 66.3
22:00 to 23:00 Hr 47.6 75.3 51.3 49.3 87.4 58.4
23:00 to 24:00 Hr 45.2 60.7 49.2 49.1 89.8 53.6

 


Location: City Tower

                (Commercial)

Normal Day

(12th October 2017)

Diwali Day

(19th October 2017)

Time Duration Lmin Lmax Leq dB(A) Lmin Lmax Leq dB(A)
18:00 to 19:00 Hr 58.5 95.7 60.3 59.2 107.3 63.7
19:00 to 20:00 Hr 54.8 93.5 58.6 57.5 105.3 69.9
20:00 to 21:00 Hr 48.9 88.2 54.5 59.7 116.6 73.2
21:00 to 22:00 Hr 48.2 90.5 55.7 55.4 106.7 71.5
22:00 to 23:00 Hr 46.9 79.8 49.8 51.8 107.8 62.7
23:00 to 24:00 Hr 46.7 75.7 48.9 50.1 104.1 57.4

 


Location: District Hospital

                  (Silence Zone)

Normal Day

(12th October 2017)

Diwali Day

(19th October 2017)

Time Duration Lmin Lmax Leq dB(A) Lmin Lmax Leq dB(A)  
18:00 to 19:00 Hr 47.8 79.6 54.8 48.7 89.2 61.1  
19:00 to 20:00 Hr 48.2 80.4 52.5 44.9 91.8 61.2  
20:00 to 21:00 Hr 46.2 80.1 50.9 53.5 106.4 65.0  
21:00 to 22:00 Hr 48.1 79.5 48.3 47.8 94.7 60.3  
22:00 to 23:00 Hr 44.7 68.7 48.6 46.5 89.8 56.5  
23:00 to 24:00 Hr 41.5 64.8 43.8 45.7 86.4 48.8  

 

AMBIENT AIR QUALITY DURING PRE DIWALI & DIWALI 2017
Parameter SO2 NO2 PM10
Monitoring Day Pre Diwali Diwali Pre Diwali Diwali Pre Diwali Diwali
Date

Location

12th Oct 2017 19th Oct 2017 12th Oct 2017 19th Oct 2017 12th Oct 2017 19th Oct 2017
Bank Colony BDL BDL 5.9 5.60 78 239
Dhobinala BDL BDL BDL     8.68 133 149
National Ambient Air Quality Standards 80 80 100
All values of concentration in μg/m3 of air