Nowadays, the development of urban areas should be regarded with much consideration to the environmental incidents. Wastewater pollution is perhaps the most important problem of our civil environments. For Hamadan City the difficulties arise from deficiencies of sewage system and related problems, pollution spreading to surface and underground waters and the low temperature of weather. In this research, the chardcreristics of Hamadan municipal wastewater was studied, with special regard determining sewage temperature in order to correlate this parameter to ambient temperature.
The number of required samples was determined after pretesting the wastewater and analyses were performed as soon as the samples delivered to the laboratory. Sampling was accomplished in composite basis. According to the results of experiment the correlation between the wastewater and ambient temperatures was linear for both cold and hot seasons. R values were determined to be 0.075 and 0.053 for winter and summer respectively. The municipal wastewater of Hamadan is considered to be a medium type.
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