<prompt> Strength of sewage is -E. Coli countSuspended solidsNitrateColiform count  <response>: Sewage is waste water from community,containing solid and liquid excreta derived from houses ,street, yards. The strength of sewage is indicated by Abiochemical oxygen demand Bchemical oxygen demand Csuspended solids Amount of suspended solids in domestic sewage varies from 100 -500 p.p.m.mgL If the amount is 100 mgL- weak If amount is 500 mgL- strong. Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 763 