| WBPCB Headquarter (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 55 | 49 |
| Febraury | 55 | 49 |
| March | 55 | 50 |
| April | 57 | 53 |
| May | 55 | 53 |
| June | 56 | 54 |
| July | 69 | 68 |
| August | 72 | 72 |
| September | 71 | 71 |
| October | 75 | 73 |
| November | 81 | 82 |
| December | 74 | 75 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||