At least 53 cases of sale of firecrackers were registered in Mumbai, the Police Public Relation Officer said on Saturday.
Apart from the sale of firecrackers, over 100 cases of people violating the Supreme Court's guidelines for the burning of crackers were also registered.
The Supreme Court had issued guidelines to be followed during the festive season to keep a check on pollution levels around the country, especially in the national capital.
Close to 50 lakh kilograms of firecrackers were burst in Delhi on Diwali despite the apex court's order, news agency PTI reported.
That is the same amount of firecrackers burst last year.
It equates to 1,50,000 kg of the mass of PM2.5 (particles in the air with a diameter of less than 2.5 micrometres).
In a gross violation of a Supreme Court order, people in several cities burst firecrackers before and after the specified time period.
Loud bangs rent the air in New Delhi.
Over 7,900 kg of illegal firecrackers, including over 2,500 kg on Diwali, have been seized from various parts of the national capital since the Supreme Court ordered a ban on the sale of old crackers, the Delhi Police said on Thursday.