بررسي كيفيت ميكروبي و فيزيكوشيميايي آب شرب روستاهاي شهرستان تكاب در استان آذربايجان غربي در سال 1392

Evaluation of Physicochemical and Microbial Quality of Drinking Water of Villages in Takab Town in West Azerbaijan in 2013

ويژگي هاي ميكروبي، فيزيكو شيميايي آب آشاميدني بر حسب نوع و مقدار، مبناي قضاوت درباره قابل شرب بودن و تاثيرگذاري هر كدام از اجزا فوق بر بهبود كيفيت، افزايش مقبوليت و يا تهديد سلامت مصرف كننده آن مي باشد. هدف اين تحقيق بررسي پارامترهاي ميكروبي و فيزيكوشيميايي آب شرب روستاهاي شهرستان تكاب و مقايسه آن با استاندارد ملي و جهاني مي باشد. مواد و روش ها اين مطالعه مقطعي به منظور پايش كيفي منابع آب انجام شد كه 17290 نمونه جهت كلرسنجي، 1055 نمونه براي آناليز ميكروبي و 87 نمونه جهت آناليز شيميايي و بررسي عناصر موجود در آب تهيه و نتيجه با استانداردهاي موجود مقايسه گرديد. در نهايت داده ها با آزمون آماري Mann-Whitney U آناليز گرديد. نتيجه گيري كيفيت ميكروبي آب شرب روستاهاي مورد بررسي تقريبا در محدوده استاندارد ملي آب قرار دارد. از نظر كيفيت شيميايي نيز ميزان سختي آب در برخي روستاها بالاتر از حد مطلوب و ميزان يون فلورايد در اكثر روستاها كمتر از حد استاندارد قرار داشت.

Microbial and physicochemical properties of drinking water، considering type and quantity of drinking water, are factors for determining the acceptability of water. The effects of each of the above components on increasing the quality of water or threatening the health of consumers are also considerable. We aimed to investigate the trace amounts of microbial, physicochemical parameters of drinking water in Takab, comparing to national and international standard. Materials an‎d Methods This cross-sectional study was performed in order to monitor water quality that 17290 samples were taken for determination of chlorine residual of water, 1055 samples for microbial analysis and 87 samples for chemical analysis and the results were compared with the standards. Finally, all of data were analysed by Mann-Whitney U statistically. Results 66. 7% of chlorine residual of water had standard rate and 33. 3% of the cases were higher or lower than the standard. 12. 3% of rural water was contaminated by E. coli. Average total hardness was 247. 4±110. 2, at 100% of samples Sulfate ion was maximum allowance and 98. 9% optimal, Magnesium ion at 100% of samples were maximum allowance and 85. 1% Optimal, Fluoride ion at 10. 3% of sample Allowance and 89. 7% less than allowance. Other ions are also at the maximum allowance and optimal. Conclusion The quality of drinking water in the surveyed villages was around the area according to Iran's National Standard for water. The chemical quality of water in some villages had higher hardness than optimal levels, fluoride in most villages was less than standard limit.