12.5 Water supply, drainage and sanitary requirements

1) The planning, design, construction and installation of water supply, drainage and sanitation and gas supply systems shall be in accordance with the provisions of Part-9 - Plumbing Services, Section-1 - Water Supply, Drainage and Sanitation, Section-2 - Gas supply of National Building Code of India as amended from time to time.

2) Requirements of Water Supply in Building. The total requirements of water supply shall be calculated based on the population as given below :-

Occupancy Basis Residential 5 persons per tenement Building Other Buildings No. of persons on occupant load and area of floors given in Table No.(1) 9-E

3) The requirements of water supply for various occupancies shall be as given in Table No.12-A and Table No.12-B or as specified by the Authority from time to time. Table No.12-A Per Capita Water Requirements for Various Occupancies / Uses

                  Sr.                                    Type of Occupancy                          Consumption per head
                  No.                                                                                 per day (in litres)
                   1                                                 2                                       3
                   1      Residential
                          (a) in living units                                                               135
                          (b) Hotels with lodging accommodation (per bed)                                   180

(1) Substituted vide Corrigendum / Addendum No.CR.121/21, dt.02nd December, 2021

1 2 3 2 Educational

(a) Day Schools 45

(b) Boarding Schools 135 3 Institutional (Medical Hospitals)

(a) No. of beds not exceeding 100 340

(b) No. of beds exceeding 100 450

(c) Medical quarters and hostels 135

  4    Assembly :- Cinema theatres, auditorium etc. (per seat of                    15

accommodation)

  5    Government and Semi-public business                                          45
  6    Mercantile (Commercial)
       (a) Restaurants (per seat)                                                   70
       (b) Other business buildings                                                 45
  7    Industrial
       (a) Factories where bathrooms are to be provided                             45
       (b) Factories where no bath-rooms are required to be                         30

provided

  8    Storage (including warehousing)                                              30
  9    Hazardous                                                                    30
 10    Intermediate / Stations (excluding mail and express stops)               45 (25) *
 11    Junction Stations                                                        70 (45) *
 12    Terminal / Stations                                                          45
 13    International and domestic Airports                                          70

* - The value in parenthesis is for stations where bathing facilities are not provided.

Note : The number of persons for Sr.No.(10) to (13) shall be determined by the average number of passengers, handled by the station daily; due consideration may be given to the staff and workers likely to use the facilities. Table No.12-B FLUSHING STORAGE CAPACITIES

 Sr.             Classification of building            Storage capacity.

No.

 (1)                         (2)                                         (3)
   1    For tenements having common 900 litres net per w.c. seat.

convenience 2 For residential premises other than 270 litres net for one w.c. seat and 180 tenements having common convenience litres for each additional seat in the same flat.

   3    For Factories and Workshops              900 litres per w.c. seat and 180 litres per

urinal seat. 4 For cinemas, public assembly halls, etc. 900 litres per w.c. seat and 350 litres per urinal seat.