| WBPCB Headquarter (C) | ||
| Months | Day | Night |
| Standard Limit in Leq dB(A) | 65 | 55 |
| January | 62 | 55 |
| Febraury | 62 | 55 |
| March | 59 | 53 |
| April | 54 | 49 |
| May | 58 | 53 |
| June | 71 | 71 |
| July | 69 | 69 |
| August | 69 | 69 |
| September | 69 | 69 |
| October | 66 | 66 |
| November | 61 | 57 |
| December | 57 | 55 |
| All Values are measured in Leq dB(A) | ||
| I= Industrial, C= Commercial, R= Residential, S= Silence | ||