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Indoor Air Pollution – Introduction
Apurva Chawre

Indoor Air Pollution – Introduction

What Is Indoor Air Pollution?

Indoor air pollution can be defined as chemical, physical and biological contamination of indoor air. In simple words indoor air pollution is the contamination of indoor air due to incorporation of substances (pollutants) which are not natural constituents of indoor air.

Indoor air pollution - Introduction

Indoor air pollution is a silent threat to the life. You are most likely to get sick from pollution in your home and office than pollution in the air.

Clean and fresh air is one of the basic amenities for survival of life on earth. Air is a matter of life and death. It helps to maintain continuous balance between inspiration and expiration.

Yet indoor air quality is often neglected.

We all are well versed with the outdoor air pollution. With its sources and effects it can have on human health and environment.

But, we all are not so familiar with indoor air pollution.

Today, an average person is said to spend 90% of his time inside buildings (indoors).Indoor air pollution is a problem for all types of homes, whether in dense urban cities or rural villages. Gaining knowledge about different types and sources of indoor air pollution is one of the stepping stones in eliminating indoor air pollution.

Depending upon the infrastructure, geographical location, the type and sources of indoor air pollution is bound to vary.

So, let’s first take a look at the types.

Types of Indoor Air Pollution

Indoor air pollution can be classified into three types based upon the sources of its pollutants.

Types of indoor air pollution

Particle Pollution

These are tiny suspended particulate matter in air and commonly include pollutants such as pollen, dust, smoke, dander (skin flakes). The particulate matter diameters of these pollutants are measured in microns and they range from 0.001 to 1000 microns.

Biological Pollution

In this type of indoor air pollution, microbial agents such as bacteria, germs, viruses, fungi, spores and molds forms the base for pollution.

Gaseous Pollution

Indoor odours and gases are another agents which play role in indoor air pollution. In this type of indoor air pollution; the pollutants involved are benzene, Volatile organic compounds (VOCs), formaldehyde, chloroform, hydrogen sulphide, ammonia, etc.

All these types of indoor air pollution have different characteristics and hence to eliminate the pollution you first need to know and identify the type of indoor air pollution and then target the major sources of pollutants.

To be able to target the source of pollutant, you should gain knowledge about the different sources.
So, now let’s take a look at the Indoor air pollution sources.

Sources of Indoor Air Pollution

There are plenty of pollutants which pollute the indoor air. Most of these pollutants and their sources have been summarized in the following table.

Pollutants

Sources of Indoor air pollution

Carbon dioxide
Carbon monoxide
Nitrogen dioxideSulphur dioxidePAHs(Polycyclic aromatic hydrocarbons)
·       Unvented gas heater/ kerosene heater

·       Improperly operating gas or oil furnace

·       Fireplace

·       Wood stove

·       Tobacco smoke

·       Automobile exhaust from attached garage

RSP (respirable particulates) ·       Fireplace

·       Woodstove

·       Unvented gas heater

·       Tobacco products

Environmental Tobacco smoke (ETS) ·       Tobacco products (Cigarette, pipes, etc)

·       Second hand smoke

Volatile organic compounds (VOCs) ·       Paints

·       Air fresheners

·       Aerosol sprays

·       Varnishes

·       Wood preservatives

·       Perfumes, hairsprays

·       Moth repellents

·       Cleaners and disinfectants

·       Copy machines/faxes/printers

·       Hobby and craft supplies

·       Carpet dyes and fibres

Formaldehyde ·       Interior plywood

·       Pressed wood products (hardwood, fibreboard, etc)

·       Urea-Formaldehyde foam insulation

·       Nail polish

·       Mattresses, clothing

·       Glue and adhesives

Pesticides ·       Insecticides

·       Fungicides

·       Herbicides (from outdoor use)

·       Disinfectants

Heavy metals
(Lead, mercury, cadmium, chromium, arsenic)
·       Lead based paint

·       Exterior dust and soil

·       Huge industrial pollutants

Radon ·       Building materials

·       Soil, rock and well water

Asbestos ·       Fire proofing

·       Deteriorating or damaged insulation

Biological contaminants

(Virus, Bacteria, Fungi, Molds)

·       Pets

·       Humans

·       Standing water

·       Humidifiers

·       Ventilation systems

·       Cooling coils in air cooling units

·       Drip pans

·       Water damaged materials

·       Moist surfaces, Wet or damp materials

·       Evaporative coolers

·       Hot water tanks

·       Pillows

·       Beddings

·       House dust

·       High humidity regions

·       Cockroaches

·       Mites

·       Pollen

 

Indoor air pollution is considered as a complex issue in terms of toxicology and health risk assessment. There are many different types of pollutants which may give rise to combined effects.

Sources-of-Indoor-Air-Pollution at homes and Offices

Read more about how to improve indoor air quality.

Below are some interesting facts on indoor air pollution to understand importance of indoor air pollution.

Top 5 Indoor Air Pollution Facts

Air pollution is one of the major reason of early deaths of young adults in world. The worst air quality we experience every day is most likely to be in our living room.

10 Indoor plants that purify indoor air

Let’s see Important 5 facts of Indoor air pollution:

Indoor air quality is Major health risk

As per EPA, poor indoor air quality is risk to mankind. Indoor air is 100X times more harmful than compared to outdoor air. We normally spend 12-18 hours indoor i.e. homes, office, shopping malls, restaurants, etc. Major reasons of indoor air pollution are poor ventilation, air fresheners, chemicals, dust, traditional method of cooking food, etc.

Indoor air pollution - Traditional cooking method

Increase in diseases like asthma, lung cancer, allergies in children

The people e who suffered asthma, lung cancer, allergies because most likely they have exposed to poor air quality for longer period.

Indoor air pollution - Ashtma

Reduce the use of Air Freshener

As per NRDC use of air freshener for longer period can cause asthma, respiratory sensitivity in babies and children. We should restrict use of air freshener in homes and schools.

We offer indoor air quality monitoring testing services for homes and Offices.

Reduce usage of Printers in Homes

Inkjet printers are as harmful as Air fresheners. Because they release chemicals like glymes in the air which are very harmful for developmental and reproductive damage. It is better to have your photos or documents printed at the stores.

Smoke is one of the Top Air pollutant

As we all know that smoking is very dangerous for our health and Second-hand smoke is even worse. It is known that it contains more than 600 types of poisons. It also includes carcinogenic chemicals. Second-hand smoke severely affects infants and children increasing risk of asthma, ear infections, etc.

Indoor air pollution - Smoking

With this knowledge gained we all have crossed our first stepping stone towards a cleaner, fresher and healthier indoor environment.

Source1

Source2

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Indoor Air Pollution – Introduction