Introduction: Ageing is a process of gradual and spontaneous change, resulting in maturation through childhood, puberty, young adulthood, and then middle age. Not all of the changes that occur with age are deleterious and some of them like increased experience and circumspection are among the positive points of the old age. Iran's population of 60 year old and more has been 7.8% in Demographic and Health Survey in year 2000 and it is estimated to be more than 10% by year 2021. The aim of this study was to assess the health status of elderly workers of Tehran Municipality public services and green space.

 Methods: In this cross sectional study, health records of these workers were assessed from 2002 to 2005 and their data were analyzed. Altogether, records of 31272 individuals were assessed in this four-year study. Using the old age definition of 60 year and more, there was a total 6532 elders among these workers. All the analyses were performed for this age group and in comparison with the less than 60-year-old group.

 Results: Mean age was 67.2 years (SD: 5.3). Smoking was reported by 26.7% of them. The most common complaints about the harmful factors of work environment were disturbing warmth and coldness (83.8%), work-related dust (69.5%), microbial contamination (50.5%), disturbing smell (44%), and risk of accidents and injuries (34%). The most common reported physical signs and symptoms were high blood pressure (30.2%), vision disturbances (27.8%), hearing disturbances (16.8%), cardiovascular disease (15.8%), and joint and extremities pain (15.7%).

 Conclusion: In comparison of clinical problems' observed patterns in this group, some of them like high blood pressure and visual disturbances were similar with national patterns and other problems' pattern were different. In addition, the high proportion of illiteracy in the elderly population in this study necessitates providing facilities for their education at first and using the face-to-face education methods in the meanwhile for improving their health status.

 Hakim Research Journal 2007 10(3): 62- 69.