| WBPCB Headquarter (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 63 | 57 |
| Febraury | 63 | 59 |
| March | 63 | 59 |
| April | 63 | 58 |
| May | 64 | 58 |
| June | 64 | 58 |
| July | 64 | 58 |
| August | 64 | 61 |
| September | 63 | 56 |
| October | 62 | 57 |
| November | 62 | 57 |
| December | 62 | 57 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||