How Colour Codes Help Hospitals Segregate Waste
- Dr. Sanjay Joshi

- Aug 1, 2025
- 3 min read
Proper segregation at the point of generation is the key to successful biomedical waste management.

Through my previous articles, I have presented a brief review of various legal provisions for managing waste generated in healthcare establishments across the country. Let us now explore the actual ‘on-site’ activities that are carried out at the sources of generation and the common facilities for treatment and disposal of the hospital waste. There are four major activities related to the management of this waste. These are segregation, transportation, treatment, and disposal.
1.Segregation: It is always said that proper segregation of waste right at the source of its generation is the key to the success of a waste management programme. The same applies to biomedical waste also. As per the rules, every occupier must ensure that the four categories of waste generated are properly segregated. For this, four different coloured non-chlorinated plastic bags or containers are mandatory. These are as follows:
A) Yellow Bag: As per the 2016 rules, the yellow-coloured bags are to be strictly used for the collection and temporary storage of highly infectious and hazardous waste, which are as follows:
i) Human Anatomical Waste: Human tissues, organs, body parts, and foetuses below the viability period (as per the Medical Termination of
Pregnancy Act 1971, amended from time to time).
ii) Animal Anatomical Waste: Experimental animal carcasses, body parts, organs, and tissues, including the waste generated from animals used in experiments or testing in veterinary hospitals or colleges, or animal houses.
iii) Soiled Waste: Items contaminated with blood or body fluids, like dressings, plaster casts, cotton swabs, and bags containing residual or discarded blood and blood components.
iv) Discarded or Expired Medicines: Pharmaceutical waste like antibiotics and cytotoxic drugs, including all items contaminated with cytotoxic drugs, along with glass or plastic ampoules, vials, etc.
v) Chemical Waste: Chemicals used in the production of biologicals, and used or discarded disinfectants
vi) Chemical Liquid Waste: Liquid waste generated due to the use of chemicals in the production of biologicals and used or discarded disinfectants, silver X-ray film developing liquid, discarded formalin, infected secretions, aspirated body fluids, liquid from laboratories and floor washings, cleaning, housekeeping, disinfecting activities, etc.
vii) Discarded linen, mattresses, and bedding contaminated with blood or body fluid, as well as routine masks and gowns.
viii) Microbiology, Biotechnology, and other clinical laboratory waste (pre-treated): These include blood bags, laboratory cultures, stocks or specimens of microorganisms, live or attenuated vaccines, human and animal cell cultures used in research. Additionally, you have industrial laboratories, the production of biological residual toxins, dishes, and devices used for cultures.
B) Red Bag: Wastes generated from disposable medical items include tubing, bottles, intravenous tubes and sets, catheters, urine bags, and syringes without needles. This category also includes fixed needle syringes with their needles cut, gloves, and vacutainers, the small, sterile tubes used to collect blood samples for laboratory testing.
C) White Bag: Waste Sharps, including metals, needles, syringes with fixed needles, needles from needle tip cutters or burners, scalpels, blades, or any other contaminated sharp object that may cause punctures and cuts. This includes used, discarded, and contaminated metal sharps. Preferably, white, translucent, puncture-proof, leak-proof, tamper-proof containers should be used instead of plastic bags.
D) Blue box: Puncture-proof, leak-proof boxes or containers with blue coloured markings are to be used for broken or discarded and contaminated glass, including medicine vials and ampoules, except those contaminated with cytotoxic waste.
More information on this is in my next article. Until then, have a nice weekend!
(The writer is an environmentalist.)





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