Showing 2 results for Microbial Quality
Mohammad Ali Zazouli, Marjaneh Safarpour Ghadi, Amir Veisi, Pouran Habibkhani,
Volume 21, Issue 1 (2-2012)
Abstract
Background and purpose: Heterotrophic plate count (HPC) is commonly used to assess the general microbiological quality of drinking water. HPC must be less than 500 colonies per milliliter in drinking water. The aim of this study was to compare the heterotrophic bacteria of bottled water and drinking water distribution system and their relationship with water quality parameters.
Materials and methods: In this study 21 samples of bottled water belonging to seven domestic brands and 15 samples of drinking water from water distribution system in Semnan were analyzed and compared for HPC. The Relationship between HPC with pH, temperature, turbidity and free residual chlorine were also determined in drinking water distribution system.
Results: The results showed that HPC was lower in bottled water compared with that of the tap water. HPC has increased when the temperature increased. In contrast, HPC has decreased when free residual chlorine increased. Turbidity and pH did not influence the HPC in drinking water distribution system.
Conclusion: The quality of all bottled water was consistent with the Iranian drinking water standards and also the standard levels proposed by World Health Organization. However, HPC was found more in some parts of distribution system where the residual chlorine was low.
Fathollah Gholami-Borujeni, Seyedehfatemehh Mousavi, Hadi Niknejad,
Volume 30, Issue 188 (9-2020)
Abstract
Background and purpose: Contamination of swimming beaches in north of Iran has caused environmental problems in recent years. Mahmoudabad is exposed to these dangers due to having the longest coastline in the country. The aim of this study was to determine microbial water quality of swimming beaches in Mahmoudabad.
Materials and methods: In a descriptive-analytical study, we analyzed microbial water quality from 15 different sites in 2019 (monthly). Microbial tests were carried out according to the standard methods for Coliform group and Enterococcus faecalis. Data analysis was performed in SPSS software.
Results: The average total coliforms in all sampling sites exceeded 1000 MPN/100 ml in summer, autumn and winter. In all seasons, E. faecalis were detected at highest levels in most of the swimming sites. Other sites had standard fecal coliform microbial quality for swimming beaches.
Conclusion: Microbial quality of natural swimming beaches in Mahmudabad was not favorable which could pose health risks to swimmers and travelers.
