Water quality assessment for beach balneability on the beach Beira Rio - Porto Nacional – TO / Avaliação da qualidade das águas para balneabilidade na praia Beira Rio – Porto Nacional – TO

Ângelo Ricardo Balduino, Salomão Rodrigues De Castro Filho


The Tocantins River has abundant water resources and favorable conditions for recreational activities, with emphasis on the beautiful natural beaches formed along its length. However, it is worth noting that the main contact entertainment and leisure activities require specific health and safety standards for bathing purposes. This study evaluated the water quality of Praia Beira Rio, in Porto Nacional-Tocantins, in only one point. For this purpose, microbiological analysis was performed using indicators of total coliforms and Escherichia coli (E. coli) following the method described by APHA (2005). The monitoring results were compared with the parameters for bathing purposes defined in CONAMA Resolution 274/00. To detect and identify total coliforms and Escherichia coli, the Colilert technique was used. The Escherichia coli content was low, allowing bathing waters to be classified as their own, according to CONAMA Resolution No. 274/00, and subdivided into the "excellent" category. Therefore, according to the bacterial indicators of the Escherichia coli group, during the analysis period, the waters of Praia Beira Rio were within the standards for primary contact recreation.


Bathing, Escherichia coli, Beira Rio beach

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APHA - American Public Health Association. Standard methods for the examination of water and wastewater. 21st edition. American Public Health Association. Washington: APHA, 2005.

BRAZIL OF WATERS. The importance of water. 2013.

BRAZIL. CONAMA Resolution. Resolution No. 274, of November 29, 2000. Section 1, pages 70 - 71. Defines criteria for bathing Brazilian waters. Published in the Official Gazette, nº 18 of 25 January 2001.

BERG, C. H; GUERCIO, M. J; ULBRICHT, V. R. Indicators of Bathing: The Brazilian situation and the recommendations of the World Health Organization. International Journal of Knowledge Engineering and Management. Florianópolis, v. 2, n. 3, p. 83-101, jul./out, 2013.

CAMPOS, J. S; CUNHA, H. F.A. Comparative analysis of bathing parameters in Fazendinha, Macapá-AP. Amazon Biota, ISSN 2179-5746. v.5, n.4, p. 110-118, Macapá, 2015

CETESB. Environmental Sanitation Technology Company. Quality Report of Coastal Waters in the State of São Paulo - Beach Balneability. São Paulo: 142 p, 2004.

NATIONAL ENVIRONMENT COUNCIL. RESOLUTION N ° 274 of November 29, 2000: Defines the criteria for bathing in Brazilian waters. Brasilia, 2000.

GOVERNMENT OF THE STATE OF TOCANTINS. Preparation of the Tocantins State Water Resources Plan. Secretariat for the Environment and Sustainable Development, 2011

MARQUEZI, M. C. Methodological comparison to estimate the most probable number (MPN) of coliforms in water samples. 2010. Dissertation (Master's). University of São Paulo, Luiz Queiroz Higher School of Agriculture, 2010.

PELEJA, J.R.P. Study of the Bathing Conditions of Alter do Chão Beaches: Technical Scientific Report. Santarém, Federal University of Western Pará, 2015.

SILVA, A. P; LIMA, D. P; BALDUINO, A. R. Diagnosis of the bathing conditions of Praia Beira Rio in the municipality of Porto Nacional (TO). Engineering Sciences, v.7, n.2, p.53- 59, 2019.

SMITH, D. G. et. al. Human perception of water appearance1. Clarity and color for bathing and aesthetics. New Zealand Navy Journal. Wellington, vol. 29. 1995.

SOUZA, I. N. C; BALDUINO, A. R; GOMES, S. B. Assessment of the bathing conditions of Porto Real beach in Porto Nacional / Tocantins. Araguaína: Instituto Tocantinense Presidente Antônio Carlos, 2016.

SOUZA, P. V. F.; BALDUINO, A. R. Diagnosis of the bathing conditions of Beira Rio beach in the municipality of Porto Nacional, Tocantins. Instituto Tocantinense Presidente Antônio Carlos, 2020

VIEIRA, B. M. Evaluation of water quality and its compatibility with uses in rural watersheds with quantitative water deficit. Dissertation (Master Environmental Engineering Course) - Technological Center, Federal University of Espirito Santo, Vitória, 2015.

DOI: https://doi.org/10.34117/bjdv7n6-123


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