We can improve sanitation conditions of an area as follows:
(i)We should take care of personal and environmental sanitation.
(ii) Low cost on-site sewage disposal systems like septic tanks, chemical tanks, etc. should be built where there is no sewage system.
(iii) People should be made aware of the benefits of sanitation.
(iv)We should keep our surroundings clean.
(v)We should help the municipal corporation or gram panchayat to cover all the open drains and remove the unhygienic as well as disease causing substances thrown in open.

(i) Septic tanks,
(ii) Compost pits.

The dissolved and suspended impurities present in sewages are known as contaminants. These contaminants are organic and inorganic impurities, nutrients saprophytic and disease causing bacteria and other microbes.

Contaminated water is a source of many water borne diseases which include: cholera, typhoid, polio, meningitis, hepatitis and dysentery.

The two water disinfectants used during treatment of waste water are chlorine and ozone.

Untreated excreta contaminates water. It encourages algae bloom in water bodies. The water of such water bodies become unfit for drinking and other household purposes. Such water is also cause of a large number of water borne diseases such as typhoid, cholera, hepatitis and polio, etc.

Low cost onsite sewage disposal system must be encouraged to improve sanitation.

Chlorination is the process of adding chlorine (chemical) in water to make it safe for drinking.

Dysentry.

The used water should not be wasted but it should be cleaned.

Sewers are the pipes acting as a transport system that carries sewage from point of origin to the point of disposal. The wastewater released from homes, industries, hospitals, offices and other uses is called sewage

Vermi-processing toilets.

It is used as manure, thus returning organic matter and nutrients to the soil.

Chemical toilets.

Vermi-processing toilets.