| WBPCB Headquarter (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 69 | 69 |
| Febraury | 68 | 67 |
| March | 75 | 73 |
| April | 74 | 73 |
| May | 77 | 77 |
| June | 80 | 79 |
| July | 81 | 81 |
| August | 77 | 77 |
| September | 81 | 80 |
| October | 75 | 75 |
| November | 70 | 70 |
| December | 75 | 75 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||