en Food Safety and Hygiene Food Safety and Hygiene پژوهشي Original Article <p dir="ltr"><span style="font-size:14px;"><span style="font-family: times new roman;"><strong>Background</strong>: Foods have been many changes from production to tables and continuous control is necessary to maintain food safety and supply foods with good quality. The aim of this study was to evaluate the quality of some foods with high consumption in Zanjan city during the 5 years from 2009 to 2013<span dir="RTL">.</span><br> <strong>Methods: </strong>In a case-control descriptive study with an annually control program during 5 years from 2009 to 2014, some food samples including pasteurized milk, vegetables oils, flour, kabab, salt, confectionary products and a special sweet named nan-chay were collected and analyzed in food control laboratory of Zanjan university of medical sciences.</span></span><br> <span style="font-size:14px;"><span style="font-family: times new roman;"><strong>Results: </strong>According to national standard of Iran, 68.4%, 46%, 24.3%, 10.4%, 9.3%, 5% of Nan-chay, salt, vegetable oils, kabab, confectionary products, pasteurized milk and samples were out of national standard limits and unacceptable, respectively. All flour samples had good standard quality. Mean&plusmn;sd values of pH in Nan-chay samples were 7.5 and 1.19, respectively. Mean&plusmn;sd values of the degree of purity in salt samples were 98.21 and 1.75, respectively.</span></span><br> <span style="font-size:14px;"><span style="font-family: times new roman;"><strong>Conclusion:</strong> Results showed that among the 7 types of collected foods in Zanjan city, the most nonstandard cases were of Nan-chay samples and the best quality belongs to flour samples.</span></span></p> Food quality, Chemical contamination, Microbial contamination, Zanjan 143 148 http://jhehp.zums.ac.ir/browse.php?a_code=A-10-47-1&slc_lang=en&sid=1 Tooran Yarahmadi Yarahmadi.tooran@gmail.com 10031947532846009251 10031947532846009251 No Department of Environmental Health Engineering, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran. Hassan Hassanzadaza h.hasanzadazar@yahoo.com 10031947532846009252 10031947532846009252 No Department of Food Safety and Hygiene, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran. Sajad Chamandoost majidaminzare@live.com 10031947532846009253 10031947532846009253 No Department of Food Safety and Hygiene, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran. Majid Aminzarer majidaminzare@live.com 10031947532846009254 10031947532846009254 Yes Department of Food Safety and Hygiene, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran.