STP Size Calculator

Enter the following data:

Total Persons (in Nos.):

Sewerage Generation per Person (in LPD):

Note:

• The standard values for sewerage generation per person are 135 liters per day for domestic and 70 liters per day for offices as per NBC.
• The design period for an STP is typically 20 years as per CPWD.
• The BOD value for domestic wastewater is typically 300 mg/liter, while for offices it is typically 200 mg/liter as per NBC.