flowchart LR A[Anticipate] --> R[Recognise] R --> E[Evaluate] E --> C[Control] C -. Continuous .-> A style A fill:#E3F2FD,stroke:#1565C0 style R fill:#FFF3E0,stroke:#E65100 style E fill:#E8F5E9,stroke:#2E7D32 style C fill:#FCE4EC,stroke:#AD1457
54 Industrial Health and Hygiene
This chapter covers industrial health and hygiene — the systematic effort to identify, evaluate and control workplace conditions that may cause sickness, impaired health or significant discomfort to workers.
54.1 Concept and Scope
Industrial health, also called occupational health, is defined by the WHO and ILO Joint Committee (1950) as having three elements: promotion and maintenance of the highest degree of physical, mental and social well-being of workers in all occupations; prevention of departures from health caused by working conditions; and placing and maintenance of the worker in an occupational environment adapted to her physiological and psychological capabilities.
TipThree Aims of Occupational Health
| Aim | What it covers |
|---|---|
| Promotion and maintenance | Highest physical, mental and social well-being |
| Prevention | Of ill-health caused by work |
| Adaptation | Match between worker capability and job demands |
The companion concept — industrial hygiene — focuses specifically on anticipation, recognition, evaluation and control of workplace hazards.
54.2 Types of Workplace Hazards
Workplace hazards are typically classified into five families.
TipFive Families of Workplace Hazards
| Hazard | Examples |
|---|---|
| Physical | Noise, vibration, heat, cold, radiation, illumination, pressure |
| Chemical | Dust, fumes, gases, vapours, solvents, acids, alkalis, metals |
| Biological | Bacteria, viruses, fungi, parasites — relevant in healthcare, agriculture, sewage work |
| Ergonomic | Posture, repetitive motion, lifting, manual handling, layout of workstation |
| Psychosocial | Job stress, harassment, shift-work fatigue, monotony, role conflict |
54.3 Common Industrial Health Problems in India
TipCommon Industrial Health Problems
| Problem | Sectors most affected |
|---|---|
| Silicosis, pneumoconiosis | Mines, quarries, glass, foundries |
| Asbestosis | Asbestos handling, ship-breaking |
| Lead poisoning | Battery manufacture, paint |
| Heat stress | Steel, glass, textiles, construction |
| Hearing impairment | Mines, foundries, weaving |
| Skin diseases | Chemicals, dyes, cement, agriculture |
| Repetitive strain injury | IT and BPO, electronic assembly |
| Respiratory disorders | Cement, jute, cotton, beedi, agriculture |
54.4 Statutory Framework — Health Provisions
Indian labour law mandates basic health and hygiene provisions in every covered workplace.
TipStatutory Health Provisions across Indian Statutes
| Statute | Health provisions |
|---|---|
| Factories Act, 1948 §§11-20 | Cleanliness, ventilation, temperature, dust, drinking water, latrines, lighting, overcrowding |
| Mines Act, 1952 §§19-22 | Drinking water, conservancy, medical appliances, pit-head baths |
| Plantations Labour Act, 1951 §§8-13 | Drinking water, medical, sickness allowance, conservancy |
| Contract Labour Act, 1970 §§16-19 | Rest, drinking water, latrines, first-aid |
| BOCW Act, 1996 §§32-37 | Drinking water, latrines, accommodation, first-aid, crèche |
| OSH Code, 2020 | Consolidates all the above |
54.5 Industrial Hygiene — Anticipate, Recognise, Evaluate, Control
Industrial hygiene is a structured discipline. The American Industrial Hygiene Association defines four steps.
TipFour Steps of Industrial Hygiene
| Step | What it does |
|---|---|
| Anticipate | Identify potential hazards before they occur — design review, hazard analysis |
| Recognise | Identify hazards present in the workplace — walkthrough, employee interviews |
| Evaluate | Measure exposure levels — monitoring, sampling |
| Control | Reduce or eliminate exposure — hierarchy of controls |
54.6 Hierarchy of Controls
When a hazard cannot be eliminated, the hierarchy of controls prescribes the order in which control measures should be applied.
TipHierarchy of Controls (NIOSH)
| Level | Control | Example |
|---|---|---|
| 1 (most effective) | Elimination | Remove the hazard entirely — discontinue use of asbestos |
| 2 | Substitution | Replace with safer alternative — water-based instead of solvent-based paint |
| 3 | Engineering controls | Isolate the worker from the hazard — ventilation, enclosure, automation |
| 4 | Administrative controls | Change how people work — rotation, shorter shifts, training |
| 5 (least effective) | Personal protective equipment (PPE) | Masks, gloves, safety glasses, helmets |
The hierarchy emphasises that PPE is the last line of defence, not the first — a frequently violated principle in Indian workplaces.
54.7 Health Examinations and Surveillance
TipThree Types of Health Examination
| Type | When conducted |
|---|---|
| Pre-employment | Before joining; ensures fitness for the job |
| Periodic | At regular intervals during employment; tracks impact of work on health |
| Special | Following accidents or for workers in hazardous processes |
The Factories Act, 1948 (§87) and the Mines Act, 1952 (§24) require periodic medical examination for workers in dangerous operations and hazardous processes. Schedule III of the Factories Act lists notifiable occupational diseases — silicosis, pneumoconiosis, asbestosis, lead poisoning, manganese poisoning, and others.
54.8 Mental Health and Psychosocial Hygiene
A growing area of industrial-health concern. The ILO’s Mental Health at Work (2022) framework calls for:
- Removing or reducing psychosocial risks at work;
- Building organisational capacity to recognise and respond to mental-health issues;
- Supporting workers with mental-health conditions to participate fully and thrive at work;
- Eliminating stigma and discrimination.
The post-pandemic surge in workplace mental-health programmes — Employee Assistance Programmes, mindfulness apps, mental-health days — reflects this shift.
54.9 Workplace Wellness Programmes
Modern firms increasingly run workplace wellness programmes covering five dimensions (chapter 22):
TipFive Dimensions of Workplace Wellness
| Dimension | Typical programme |
|---|---|
| Physical | Annual health checks, gym access, ergonomic furniture |
| Mental / emotional | EAP, counselling, mindfulness apps |
| Social | Team events, employee resource groups |
| Financial | Financial-literacy workshops, retirement-planning support |
| Career / purpose | Development conversations, alignment of work with values |
54.10 Roles and Authorities
TipHealth and Safety Roles in Indian Workplaces
| Role | Statutory anchor |
|---|---|
| Certifying Surgeon | Factories Act §10; Mines Act |
| Safety Officer | Factories Act §40B (1,000+ workers or hazardous process) |
| Welfare Officer | Factories Act §49 (500+ workers) |
| Inspector of Factories | §8 |
| Director-General of Factory Advice Service & Labour Institutes (DGFASLI) | Central agency |
| DGMS (mining) | Chief inspector for mines |
| ESIC | For ESI-covered workers |
The DGFASLI, with the four Central Labour Institutes (Mumbai, Kolkata, Chennai, Kanpur), is the central technical agency for industrial safety and health in India.
54.11 Practice Questions
Eight questions to test the chapter. Each card hides the answer — click Show answer to reveal it.
Q1
WHO and ILO Joint Committee (1950)
WHO and ILO Joint Committee (1950) defined occupational health as having how many aims?
ATwo
BThree (promotion, prevention, adaptation)
CFour
DFive
Show answer
Correct answer
B. Three (promotion, prevention, adaptation)
Q2
Match hazard with example: | |
Match hazard with example:
A. (i)-(b), (ii)-(c), (iii)-(d), (iv)-(a)
| Hazard | Example | ||
|---|---|---|---|
| (i) | Physical | (a) | Ergonomic posture |
| (ii) | Chemical | (b) | Noise |
| (iii) | Biological | (c) | Solvent vapour |
| (iv) | Ergonomic | (d) | Bacteria, viruses |
Show answer
Correct answer
A. (i)-(b), (ii)-(c), (iii)-(d), (iv)-(a)
Q3
The hierarchy of controls places which
The hierarchy of controls places which control as most effective?
APPE
BAdministrative controls
CElimination
DSubstitution
Show answer
Correct answer
C. Elimination
Q4
PPE is at which level of
PPE is at which level of the hierarchy?
AMost effective
BSecond most effective
CMiddle level
DLeast effective — last line of defence
Show answer
Correct answer
D. Least effective — last line of defence
Q5
Which is not among the four
Which is not among the four steps of industrial hygiene?
AAnticipate
BRecognise
CEvaluate
DLitigate
Show answer
Correct answer
D. The four are anticipate, recognise, evaluate, control.
Q6
Notifiable occupational diseases under the Fact...
Notifiable occupational diseases under the Factories Act are listed in:
ASchedule I
BSchedule II
CSchedule III
DSchedule IV
Show answer
Correct answer
C. Schedule III
Q7
DGFASLI stands for
DGFASLI stands for:
ADirector General of Factories and Labour Inspectors
BDirector-General of Factory Advice Service and Labour Institutes
CDepartment of General Factory and Safety Inspection
DDirectorate of Factories, Agencies, Safety and Labour
Show answer
Correct answer
B. Director-General of Factory Advice Service and Labour Institutes
Q8
Pit-head baths are particularly important in
Pit-head baths are particularly important in which industry?
ASoftware
BCoal mining
CBanking
DHospitality
Show answer
Correct answer
B. Coal mining
ImportantQuick recall
- Industrial health = three aims (WHO-ILO 1950): promotion, prevention, adaptation.
- Five hazard families: physical, chemical, biological, ergonomic, psychosocial.
- Industrial hygiene — four steps: Anticipate → Recognise → Evaluate → Control.
- Hierarchy of controls: Elimination → Substitution → Engineering → Administrative → PPE (least effective).
- Three health examinations: pre-employment, periodic, special.
- Notifiable occupational diseases — Schedule III of Factories Act.
- Roles: Certifying Surgeon, Safety Officer (1,000+ or hazardous), Welfare Officer (500+), Inspector.
- DGFASLI + four Central Labour Institutes — central technical agency.
- Mental health and wellness — emerging dimensions.