Groundwater quality:Study of the Nitrate(NO3-) concentration in the Urban Area of the Brazil/Bolivia Border

Abstract

Objective: To analyze the quality of groundwater potentially impacted by nitrate (NO3 -), before and after the flooding of the Madeira River, in two urban areas of Rondônia on the Brazil / Bolivia border. Method: Data and water samples were collected according to Standard Methods for the Examination for Water and Wasterwater (APHA, 1998) together with the methodology proposed in the Water Sample Collection and Preservation Environmental Sanitation -CETESB. The place were georeferenced using the Global Positioning System (GPS). For nitrate measurement, the spectrophotometry method was used using the Spectrophotometer, brand Micronal B495, the chemical reagents used were made by Alfatecnoquímica and available in two vials called reagents 1 and 2 (nitrate reagent). Results: In the first large area of risk in 100% of samples, high levels of N nitrate (NO3-) were detected. > 10 mg / L. In the second area in 30% of the samples were detected NO3 content higher than 10mg / L. Conclusions: The population is consuming water with a high degree of nitrate contamination. It alerts itself to a public health issue.

Quantitative methods and analysis of health performance and environmental conditions in the city of Porto Velho

“…Several studies endorse the scenarios found in the research. According to a study by Paraguassú-Chaves et al [19], urban groundwater used by the population for human consumption and other uses is impacted by high levels of N nitrate (NO3-). Seventy-three percent (73%) of the samples had contents> 10 mg / L of nitrate.…”

“…The study "Nitrate Contamination of Ground Water: sources and potential health effects" by Bouchard, Willians, Surampalli [22], confirms this real situation and its effects on human health. In a paper published in the "International Journal of Research and Science in Advanced Engineering", Paraguassú-Chaves et al [19] and another research result published in the journal "Debate in Action: scientific debate", Paraguassú-Chaves et al [23] demonstrate that urban groundwater in the city of Porto Among the conditions that aggravate the situation of water contamination by N nitrate (NO3-) in the urban area, is the inefficiency of basic sanitation (water supply and collection of sanitary sewage, construction of a rudimentary and septic tank in a precarious state). Queiroz, Heller, Silva [27], states that abundant and quality water is essential for public health, preventing diseases such as diarrhea and intestinal infections.…”