As for many developing countries, health issues in Iran stem from a variety of reasons: namely, water and sanitation, diet and fitness, various addictions, mental fitness, communicable diseases, hygiene and the environment.
Iran has one of the highest percentages of population in the Middle East with access to safe drinking water, with an estimated 92% of its people enjoying such access (nearly 100% in urban areas and about 80% in rural areas as of 2007).
There is a considerable shortfall in sewage treatment; for example, in Tehran the majority of the population has no wastewater treatment, with raw sewage being injected directly into the groundwater. As the water crisis deepens with an expanding population, this pollution of groundwater causes increasing health risks.
Forty-five million Iranians face inadequate nutrition according to Iranian officials. Kohgiloyeh and Boyerahmad, Sistan-Baluchistan, Hormozgan, Kerman and Khuzestan as provinces that face malnutrition or food insecurity.
The soft drinks industry is valued at about $2 billion a year. As of 2008, Iran produces about 3 billion litres of different types of soft drinks to address consumption of 46 litres per capita, and exports more than 12% of its production. Increased awareness with regards to the damages of carbonated drinks and sugar, and high levels of diabetes has created a move towards healthier products.