Type of area

Permissible limit for noise intensity decibel

Day

Evening

Night

(7 am - 6 pm)

(6 - 10 pm)

(10 pm - 7 am)

From To

From To

From To

Commercial, administrative and downtown areas

55

65

50

60

45

55

Residential areas in which can be found some workshops or commercial establishments or located on a main road

50

60

45

55

40

50

Residential areas in the city

45

55

40

50

35

45

Residential suburbs with low traffic

40

50

35

45

30

40

Residential rural areas, hospitals and gardens

35

45

30

40

25

35

Industrial areas (heavy industries)

60

70

55

65

50

60