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Last year, Diwali saw spike in air, noise pollution

Last year, Diwali saw spike in air, noise pollution

06 Nov 2018 No comment 13 hits



As the government grappled to deal with the worsening air quality, Goa was witnessed to alarming air and noise pollution last year on the Diwali night as air and noise levels went northwards due to the bursting of firecrackers and the vehicular movement.

According to ambient air quality data of the Goa State Pollution Control Board, an increase in the PM10 (particles less than 10-micrometre width) levels was observed last year during Diwali at three out of the five air quality monitoring stations of the board.

The highest level was seen in Ponda, where PM10 was 142.9 microgram/cubic metre, which is 42.9 micrograms above the standard limits.

The spike in air levels was caused due to the bursting of firecrackers.

The permissible level of PM10 is 100 micrograms per cubic metre. Levels beyond that can cause harm to the respiratory system as ultra-fine particulates can go deep into lungs and enter bloodstream.

While other cities that witnessed a notable increase in PM10 levels were Margao and Panaji with limits exceeding 116.9 PM10 and 115 PM10, respectively.

In Panaji, light motor vehicular movement was observed in all three shifts before Diwali while the burning of firecrackers was observed in the second and third shift on the day of Diwali.

In Ponda and Margao, no specific observations, other than occasional noise of crackers bursting, were made on October 19, the day Diwali was celebrated.

Similarly, in Vasco light vehicular movement in the first shift and firecrackers burning were observed in other two shifts on the Diwali day.

In Mapusa, light and heavy motor vehicular movement was observed throughout, on both monitoring days.

Moreover, a reason to worry is that the noise pollution on the Diwali day last year did not show any let-up as compared to 2016.

The sound levels for Diwali day as monitored last year in Vasco and Mapusa were pretty bad.

According to rules, the noise generated during daytime in residential areas should not exceed 65dB while the level is 75dB for a commercial area and for a silence zone the level is 60dB.

It must be noted here that during nighttime noise levels have to be 10dB lower than the daytime limits.

Out of all four monitoring sites in Panaji, Vasco, Margao and Mapusa, three were located at commercial sites and one was at a silence zone i.e. near the Mapusa municipality building.

Disturbingly, before Diwali i.e. on October 10, noise levels recorded in Mapusa were found to be exceeding the permissible limits due to the vehicular movement.

During the night the levels plunged after 9 pm but went up between 10 pm and 11 pm.

On Diwali night i.e.  October 19, the noise level exceeded the permissible limit up to 79.3dB between 8 pm and 9 pm due to the bursting of firecrackers and the vehicular movement.

Interestingly, in Panaji, on the Diwali night, the noise levels were found to be within permissible limits from 6 pm to 12 am.

During the daytime of October 11 last year maximum sound levels between 71.6dB and 72.7dB were recorded from 8 pm to 10 pm, while during the same time slot on the Diwali night the limit was within 62dB.

Vasco, which is arguably the second nosiest city in the state, noise levels were at their peak between 10 pm and 12 am at over 87.8dB on the Diwali night, exceeding the permissible limits due to the bursting of firecrackers and the vehicular movement.


Source: Last year, Diwali saw spike in air, noise pollution

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