Depth and Well Type Related to Groundwater Microbiological Contamination

Abstract

Use of groundwater from private wells in households has increased considerably, owing to a better cost/benefit ratio than that of water provided by local utilities for a fee. However, this water is usually untreated, which makes it a vehicle for diseases. Thus, monitoring this water is necessary to ensure its integrity and quality. We aimed to evaluate the physical, chemical, and microbiological parameters of untreated groundwater drawn from different types of wells, and the antimicrobial susceptibility profile of the bacteria isolated from this water. Wellwater samples were collected in two Brazilian cities. Although physical and chemical parameters of the water were suitable for drinking, Escherichia coli was detected in 33% of the samples. E. coli contaminated 65% of dug wells and 10.25% of drilled wells. Many bacteria isolated were resistant to multiple antibacterial agents, including β-lactams. Microbial contamination of this water was related to the well depth, and was more common in dug wells, making this water unfit for human consumption. Consumption of such contaminated and untreated water is a public health concern. Thus, individuals who regularly use such water must be alerted so they may either take preventive measures or connect to the water distribution system operated by local utilities.

Effects of age, sex, medication, and environmental conditions on genetic alterations in oral mucosa cells

“…The present study was based on a study conducted by Maran et al. [16], which reported the prevalence of agropastoral activities in the municipalities of Itaporã and Caarapó that are located in the south of the State of Mato Grosso do Sul, Brazil. Based on the questionnaire data, which evaluated biological parameters and lifestyle habits of the residents, 35 volunteers were selected from the cities of Caarapó and Itaporã.…”

The Quality and Importance of Groundwater in the Escarpment Zone of the Bug River Valley

“…and in particular the availability of electron donors and acceptors, are a major factor in the development of microorganisms in groundwater and the geological substrate [7].…”

“…The consumption of groundwater from private wells in households is increasing significantly, due to the lower cost of maintaining the wells than the water supplied by the waterworks. However, this water is usually untreated, which makes it a carrier of diseases [7][8][9]. In uncontaminated water systems, the main ions are released through rock weathering and water quality is related to factors such as the composition of precipitation, geological structure, mineralogy of aquifers, geological processes within the aquifer and waterrock interactions [8,10].…”

“…Moreover, domestic wells are not subject to sanitary supervision. Water consumption without proper quality control constitutes a threat to public health [7]. Hazardous groundwater contaminants include heavy metals as well as pesticides.…”

Hubungan Sumber Air Minum dengan Kandungan Total Coliform dalam Air Minum Rumah Tangga

“…Padahal sumur gali merupakan sumber air yang paling rentan terhadap pencemaran. Berdasarkan salah satu hasil penelitian, ditemukan bahwa sumur gali adalah sumber air yang paling tinggi tingkat kontaminasinya [16].…”