Bad Water Quality Research Articles

Impact on Human Health Due to Ghaggar Water Pollution

The people living in Ghaggar river basin are facing various waterborne diseases due to polluted water of Ghaggar River. The quality of Ghaggar river water was tested and analysed during this study. A health survey was also conducted to strengthen the work. The results undoubtedly verify that the quality of Ghaggar river water is not suitable to withstand the aquatic life and not fit for domestic uses. The low dissolved oxygen level and other checked parameters are clearly indicating it. The observed maximum values of biochemical oxygen demand (BOD5), color, pH, total dissolved solids (TDS), chloride (Cl-),turbidity and chemical oxygen demand (COD) were 36 mg/l, 500 ptcu, 8.6, 1321 mg/l, 161 mg/l, 301 NTU and 265 mg/l respectively. Most probable number count of river was also carried out and it shows very high number and clearly indicating that the river has bad quality of water. To understand the possible relationship between the quality of river water and water-borne diseases amongst the locals, a questionnaire survey was also carried out. The waterborne diseases observed in the study area were Jaundice, Diarrhea, Typhoid, Hepatitis, Malaria etc.

Quantifying Canadian Water Quality Index in Alhindya Barrage, Euphrates River

Recently, water quantity is decreasing due to high temperatures in summer and reducing the water quotas of Euphrates River in Iraq from the neighboring countries. These factors may increase turbidity and concentration of elements in Euphrates River especially near Alhindya Barrage, Babylon Governorate, Iraq. Thus, Euphrates River may not be valid for drinking and irrigation purposes in upstream of Alhindya Barrage. The aim of this study was to investigate the water quality upstream of Alhindya Barrage, Euphrates River, using Canadian Water Quality Index (CWQI). The comparison of water quality was investigated in the years of 2008 and 2009 according to data availability. Statistical analysis were performed on measured flowrates and indicated that there is a statistically significant difference between measured flowrates for 2008 and 2009. The results showed that the CWQI of 2008 was 94 which is good to excellent water quality, compared to CWQI of 79 for 2009. This was due to reduction in mean water quantity from 370m3/s of 2008 to 213m3/s of 2009. The global warming phenomenon is the main reason for dry seasons and low rainfall intensity and caused bad water quality.

Analysis of spatiotemporal variation in river water quality using clustering techniques: a case study in the Yeongsan River, Republic of Korea.

Herein, cluster analysis was applied to evaluate the spatiotemporal variations in water quality variables of a river. The analysis was performed using the data obtained from 15 monitoring stations during 2007-2018 in the Yeongsan River, Republic of Korea. The spatiotemporal analysis successfully clustered the annual water quality variables temporally into years of poor water quality (2007-2012) and good water quality (2013-2018), and spatially into stations observing bad water quality (midstream) and good water quality (upstream and downstream). For the spatial cluster analysis results before and after a large river engineering project, the water quality was grouped into four clusters according to regional effects and water pollutant sources. The clustering analysis results clearly reflected changes in the water quality along the river due to the project. Overall, this study demonstrates that cluster analysis can be effectively used for evaluating spatiotemporal variations in river water quality.

Tap Water, Bottled Water or In-Home Water Treatment Systems: Insights on Household Perceptions and Choices

This article addresses household strategies for coping with perceived tap water quality issues. By using a household survey (n = 581) in Catalonia (Spain) and three models, this article analyses the drivers and motivations behind the installation of in-home water treatment systems, and the use of bottled water for drinking and cooking. The main explanatory factors of the higher consumption of bottled water were the perception of poor tap water quality, the lack of in-home treatment systems, and the presence of children at home. Income did not appear as a significant variable explaining the use of bottled water, unlike in other studies. The presence of in-home treatment systems is related to factors, such as perceived bad water quality, larger households, and single-family housing. Income and housing tenure appeared as explanatory variables only when considering systems requiring some kind of installation: lower incomes or renting a multi-family house reduce the probability of having an in-home water treatment that required installation because of important investments and operating costs, and the space needed in the housing units. In-house water treatment systems may become a solid alternative to bottled water when tap water raises problematic perceptions related to bad taste, odor, or lime presence.

Macrophytes as biological indicators of organic pollution in the Lepenci River Basin in Kosovo

Macrophytes represent one part of the biological quality elements defined by the European Water Framework Directive (WFD) as ‘macrophytes and phytobenthos’. The aim of this study was to evaluate the reliability of ecological status classification by the use of macrophytes for lowland rivers with different habitat conditions, corresponding to EWFD requirements. The classification of water quality is based on the Ecological Quality Ratios (EQRs) which is proposed for the purpose of macrophyte-based classification for the WFD. To determine the ecological quality ratio, we calculated the following indices: River Macrophyte Nutrient Index (RMNI), River Macrophyte Hydraulic Index (RMHI), Macrophyte Index for Rivers (MIR), Number of macrophyte taxa which are not helophytes (NTAXA). Water sources that supply Lepenci River are located in alpine and subalpine areas of the Sharri mountain, which are considered as ecologically clean. Our results show that the water in spring area is clean but as a result of the anthropogenic activities downstream, the river becomes polluted by different pollution substances. This fact is also confirmed by the presence or absence of macrophytes that we used in this work as a biological indicator of water pollution. River Macrophyte Hydraulic Index (RMHI), has shown the highest value at SP6-Gërlicë, with a value of 8.74 that classifies this station downstream the river as the most polluted. The water flow velocity in this station is smooth and as such it is characterized with Macrophyte species associated with this type of water flow. According to the assessment of ecological status with RMNI index, the stations SP7-Kaçanik and SP8-Hani i Elezit, have good water quality and high ecological status and belong to first class (I), whereas the station with poorest water quality (fourth class) and poorest ecological status is rated SP5-Nikë. MIR index classify the quality of water as very good at S8-Hani i Elezit, whereas the values of this index at stations S5-Nikë and S6- Gërlicë indicate the bad water quality and poor ecological status. The largest number of macrophyte species that were not heliophytes was recorded in SP8-Hani i Elezit. We can conclude that the presence of macrophyte species in river varies from nutrient levels in water. Our results show that values of macrophyte based indices reflect the water quality in sampling stations therefore we can consider them as a reliable instrument for the assessment of the ecological status of the rivers.

How many submerged macrophyte species are needed to improve water clarity and quality in Yangtze floodplain lakes?

Successful re-establishment and maintenance of submerged macrophytes is a pivotal problem for the restoration of shallow eutrophic lakes, since submerged macrophytes can facilitate a shift of lake ecosystems from a turbid water state to a clear water state through their structuring roles. However, little is known about the optimal number of macrophyte species (species richness) needed for the recovery of shallow eutrophic lakes. Here, we investigated 19 shallow eutrophic lakes along the mid-lower reaches of the Yangtze River to reveal the underlying interrelations among water clarity, water quality and species richness. Our results showed positive correlations of water nutrients (TN and TP) with Kd and Red/Blue light ratio, suggesting that bad water quality can significantly lower water clarity. The results of path analysis indicated that the underwater light climate directly affects morphological and physiological traits and species richness of submerged macrophytes. Changes in functional traits also affected significantly the species richness of submerged macrophytes. Moreover, the presence of submerged macrophytes not only had positive effects on the underwater light climate (water clarity), but also on water quality. Most importantly, the assemblage of three or more submerged macrophyte species can significantly improve water clarity in these sampled eutrophic lakes, but not water quality. Additionally, the basic species assemblage of Myriophyllum spicatum and Vallisneria natans can be used for restoration of submerged macrophytes in shallow eutrophic Yangtze floodplain lakes. It is concluded that species richness and species assemblage are critical for recovery of submerged macrophytes in shallow eutrophic lakes.

A broader approach to recreational water quality assessment: Buenos Aires City case study

In the last decade, the world population has become more urban than rural, but the human contact with nature is still a necessity for a proper physical and mental development. The urban green areas are a significant part of the urban heritage, providing fundamental ecosystem services. They give us the possibility of having social and cultural interaction surrounded by nature. Water is usually part of the landscape of these areas. The quality of the recreational water in urban green areas impacts on multiple factors like soil, vegetation, aquatic and terrestrial life and public health. A complete evaluation of this quality requires applying different methodologies simultaneously. Samples were collected at eight sites of Buenos Aires City in order to assess the quality of its recreational water. Results were compared with water quality standards in established legislation and were ranked by the National Sanitation Foundation Water Quality Index (NSF-WQI). Euphotic zone transparency was used as a parameter of the impact on aquatic life, measuring the Secchi depth. A test for fecal coliform bacteria was used as a risk indicator for human health. In accordance with the NSF-WQI ranking, the eight sampling sites have medium or bad water quality. Fifty percent of the sites exceeded the allowed count of coliform bacteria. According to established legislation, five of the studied sites were found to be unsuitable for primary, secondary or passive aquatic activities. Of the remaining sites, two were suitable for passive activities and only one qualified to be suitable for all kinds of aquatic activities. Secchi depth measures reveal a bad water quality for aquatic life at four of the analyzed sites.

ASSOCIATION OF NEPHROLITHIASIS WITH DRINKING WATER QUALITY AND DIET IN PAKISTAN

Bad water quality has serious implications for human health, which may include gastrointestinal, liver, respiratory diseases and even cancer. In view of drinking water hardness in the study area, it was hypothesized that bad water quality has some association with the renal disorders. The possible association between nephrolithiasis, drinking water quality and diet in human subjects in district Abbottabad, Pakistan was investigated. Drinking water samples were collected from different areas (total number, n=100) and analyzed for various physico-chemical properties like turbidity, electrical conductivity, and pH by using standard methods. The concentration of total hardness ranged from 250 mgL-1 to 800 mgL-1 which exceeded the standard value of 60 mgL-1 and the water was found to contain high content of calcium ions. Kidney stones analysis reports of affected subjects (n=100) were examined for the type of stone. The calculi collected showed various shapes and were composed of calcium oxalate (88%), struvite (4%), uric acid (7%) and mix of calcium oxalate and uric acid (1%). Oxalate rich diet was another important risk factor for nephrolithiasis. The patients were consuming 100-300 mg day-1 of dietary oxalate. In conclusion, the quality of drinking water and diet habits contributed to nephrolithiasis.

Rapid assessment of river watershed health and vulnerability level for restoration strategy: a study of river systems in Indramayu, West Java, Indonesia

Climate change triggers a vulnerable level of a watershed. The assessment of watershed was conducted in rivers in Indramayu. Indramayu has terrible water quality due to several factors. The research aims to state the vulnerability level of Indramayu sub-watershed. The research analyzed several locations: Cimanuk sub-river and Muara Kali Prajagumiwang. The river health and vulnerability were assessed according to physical, land use, and water quality indicators in rivers. The other indicators are proposed according to the previous studies to enrich the future study result. The study finds out the possible future indicators: watershed landscape, hydrology, stream geomorphology, aquatic habitat, and biological conditions. The research uses a watershed vulnerability sequential analysis to obtain the result. The study analyzes the parameter, problems, and triggering factors from the sites. The assessment of stream corridor involves the rare species, sensitive fishes, macro-invertebrates availability, fish movement, normalization, water quality, river-land interaction, water spring, and geomorphology. The research concludes that rivers in Indramayu indicate fair and restorable impacted sub-watershed characteristics. This condition indicates that the streams have bad water quality, but they still could support a sustainable environment if it restored.

Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia

Hydrogeological survey of wider Majdanpek mining area in the Carpathian mountain arch of eastern Serbia, including open mine pits, tailings sites, and major karstic springs and caves has been undertaken in order to estimate environmental conditions in groundwater body (GWB) ?Krs?sever?, groundwater quality, and to investigate causes of their earlier indicated poor chemical status. Bearing in mind that Majdanpek copper mine field is directly bordering the karst aquifer and delineated GWB ?Krs?sever?, the two karst springs namely Valja Fundata and Kaludjerica were in situmeasured and sampled in high and low-water periods (spring 2019, late autumn 2019 and spring 2020). Sampling and analysis of groundwater were carried out under the frame of project ?Operational Monitoring of Groundwater of the Republic of Serbia?, established by the Ministry of Environmental Protection of Serbia. The field measurements of unstable chemical components and physical properties as well as laboratory analyses confirmed very poor and even hazardous water quality of both surveyed springs Valja Fundata and Kaludjerica. Registered concentrations of some ions, such as Fe2+, Mn2+, Ca2+, SO4 2?are high above maximal permitted level for potable water in Serbia. High turbidity rate also confirms impact of colloidal suspensions from the tailing which is located in karstic blind valley. Leakage of mine water passes through joints, open cavities and even large cave system Valja Fundata. Results of undertaken survey confirm that low-water period results with worse water quality and much higher concentration of hazardous substances than that characterized high-water season when infiltrated rainy water and/or melted snow dilute tailing?s wastewater. Strict application of environmental protection measures and de - sign/construction of the smaller water treatment facility at both surveyed springs should possibly mitigate the impacts of mining activities to karst groundwater and dependant ecosystem.

Assessment of Surface Water Quality in the Udy` River Basin

According to the Water Framework Directive of the European Parliament and the Council of the EU, works aimed at the protection, restoration and rational use of water resources in Ukraine are of particular relevance. Purpose. To determine and establish patterns, in temporal and spatial changes, of water quality in the Udy river basin. Methods. Statistical, system analysis Results. At all observation posts, the highest concentration ratio to MPC in such compounds as: nitrites, oil products, copper, iron, total., manganese, chromium 6, BOD5, sulfates, zinc 2+. The quality of the rivers on the border with the Russian Federation according to WPI corresponds to the “clean” class II. In the middle reaches of the rivers Udy, Lopan, Kharkov and the mouth of the Nemyshlya river, water quality deteriorates to class III “moderate pollution”. Water quality, in the estuary area of the river Lopan, class IV "contaminated". Poor water quality in the river basin. Udy near the Khoroshevo village and the village of Eskhar, where the WPI corresponds to the V class “polluted” water. According to the WPI mod water quality at most posts is equal to class III “moderate pollution”. Water quality, in the estuary area of the Lopan river and the Nemyshlya river of the WPI mod corresponds to class IV "very polluted". A high value of the WPI mode is observed at Udy at Khoroshevo village and with Eskhar - V class "polluted" water. According to the pollution coefficient χ using priorities, the water quality at most posts of the Udy river network corresponds to the “small” class II. On the Udy River near the village of M. Danilovka class III "moderate" pollution. The wellhead section of the Lopan and Udy rivers is characterized as “very polluted”. Poor water quality is observed at the post of Udy River - the Khoroshevo village with "intensive" pollution. Without priorities, the calculation of the χ coefficient showed significantly worse water quality indicators. At most posts, pollution is “moderate”. Well section of the Nemyshlya river ` is characterized as “substantial” pollution. Qualitative condition of water of the river Lopan may be defined as “intensive” pollution. Expected at the posts on the Udy River near the village of Khoroshevo and the village of Eskhar, the water quality is V class “catastrophic”. Conclusion. Certain water quality, using the three methods of WPI, WPI mod. and the pollution coefficient χ over a long period, indicates a significant environmental load of the city of Kharkov on the river system of the Udy river. Changes in water quality indicators occur without any temporary patterns. According to the pollution coefficient χ, water quality deteriorates along the length of the rivers, except for the case on the river Udy - Khoroshevo village, where pollution is qualified as “catastrophic”. Further along the length of the river is the Eskhar village, where water quality is improving, due to the self-cleaning of the river.

Produksi Air Bersih di Ma’had Rizqullah Desa Simpang Sungai Duren Kecamatan Jambi Luar Kota Muara Jambi

CLEAN WATER PRODUCTION IN RIZQULLAH ISLAMIC BOARDING SCHOOL JAMBI. Pondok Pesantren is an Islamic boarding school where students are learning about Islam as well as science and technologies. Adequate and good quality of facilities and infrastructures are needed to support good teaching and learning process. One of such facilities is clean and healthy water which is important to students and teachers in the Pondok Pesantren. Bad quality of water, either for washing or drinking, will affect students’ concentration in studying. Therefore, our community service project was aimed at improving the quality of water at Ma’had Rizqullah by installing a clean water system using multilevel filtration method. The water to be processed was ground water collected from bore wells in Pondok area. By this technology, the requirement of clean water in Ma’had Rizqullah can be met, al can also supply water needs for community around the Pondok. The product of this technology was clean water that can be used for daily activities by students and teachers living in Pondok and surrounding people.

An Analytical Hierarchy Process to manage water quality in white fish (Chirostoma estor estor) intensive culture

Chirostoma estor estor, commonly known as whitefish, is an important species that lives in some Mexican lakes and is endangered due to overexploitation. This work proposes a new computational model for water quality assessment in freshwater intensive culture tanks using fuzzy logic, and an Analytical Hierarchy Process (AHP). The most critical parameters for whitefish culture, namely dissolved oxygen, pH, temperature, total ammonia, and non-ionized ammonia, were measured. Using measurements from real cultured tanks, different situations were studied to define importance parameter weights. As a result, an index concerning good or bad water quality conditions was obtained. Chirostoma farms were assessed using the proposed index to detect potential undesirable situations, improving water management for a constant growth, reproduction and survival of this important fish.

Dampak Pulau Reklamasi terhadap Sedimentasi dan Potensi Perkembangan Mangrove Di Pesisir Teluk Jakarta (Muara Angke)

Mangroves in Indonesia have a large enough area, but in the last 3 decades the area has been reduced to 40%. Besides having a function as a coastal protector, mangroves are also able to maintain the quality of the waters around it. Currently, the construction of a reclamation island in Jakarta Bay is being carried out which will have an impact on the surrounding mangrove forests. Therefore, the purpose of this study was to identify the impact of island reclamation in Jakarta Bay on sedimentation and mangrove growth in surrounding area. This research was conducted with literature studies, vegetation analysis, water quality analysis and also spatial analysis with WorldView-2 satellite imagery. The results showed that the mangrove forests on the coast of North Jakarta, especially in the Muara Angke area tend to increase, especially in the reclaimed island area. The mangrove stands increase by approximately 1.32 ha / year. The density and stem diameters vary in 5 locations. Oxygen levels at the study site are very low but the existing mangrove forests can absorb dissolved heavy metals. The results of the study also show that the area that has the potential to be planted with mangroves is 30 ha. Overall, the sedimentation process helps expand mangrove forests naturally while the bad quality of water does not significantly affect the development of mangroves. On the contrary, the existing mangrove is able to keep the stability of the water quality in surrounding area.

Water Quality Assessment of a Meromictic Lake Based on Physicochemical Parameters and Strontium Isotopes (87Sr/86Sr) Analysis: A Case Study of Lubińskie Lake (Western Poland)

In 2017, hydrochemical surveys of meromictic Lubińskie Lake (W Poland) and its water inflows were carried out. The lake experienced complete mixing in 2008 due to a series of orkan winds, and since 2015, intensifying worsening of water quality in the lake has been observed. Our aim was to determine the degree of transformation of Lubińskie Lake based on water chemistry and to identify the source of pollution of the lake using strontium isotopes (87Sr/86Sr) as a new chemical tracking tool. The physicochemical analysis confirmed the meromictic character of the lake. The comparison with previous studies (2003 and 2008) showed significant year-to-year differentiation, indicating intensifying eutrophication of the lake’s water, both in the epilimnion and the hypolimnion. Nine spring niches, directly supplying the lake, provide water with very high phosphorus and nitrogen concentrations (up to 10 kg of nitrogen and 0.9 kg of phosphorus daily). The strontium isotopes (87Sr/86Sr) analysis indicated that the lake’s water was supplied mostly by the springs, and recharge from deep aquifers is of secondary importance. Moreover, strontium isotope data and the relationship between Sr and Cl content support the finding that the high load of nutrients is of anthropogenic origin and reaches the lake through springs.

Variación de la calidad del agua de La Ciénega de Tláhuac, México

En las márgenes de la Ciénega de Tláhuac se encuentran actualmente asentamientos humanos y se desarrollan actividades agropecuarias que impactan el medio acuático por las descargas de aguas residuales. Debido a ello, este trabajo evalúa la calidad del agua y la compara con información publicada hace 20 años. Los resultados muestran alta conductividad derivada de escurrimientos agropecuarios periféricos que emplean fertilizantes, elevada dureza, altos contenidos de sulfatos, pH alcalino, una concentración de oxígeno disuelto desde sobresaturación hasta hipoxia o anoxia, una hipereutrofización con elevados niveles de nitrógeno y fósforo totales, además de una contaminación bacteriana por coliformes fecales. Los resultados encontrados son más altos comparados con los de 20 años atrás y señalan una mala calidad del agua, en particular hipereutrofizada.

Causes and risk evaluation of oil and brine contamination in the Lower Cretaceous Continental Intercalaire aquifer in the Kebili region of southern Tunisia using chemical fingerprinting techniques

In the Kebili region of southern Tunisia, there is increasing demand of water from the Lower Cretaceous Continental Intercalaire (CI) aquifer and the Upper Cretaceous-Miocene Complex Terminal (CT) aquifer. The CI aquifer, given limited low recharge of water and increasing amounts of water extraction, has suffered intense overexploitation since the year 2000. Currently, the sustainability of CI resources is threatened by oil and brine contamination detected at a number of water wells in the Kebili region.Hydrocarbon pollution of the aquifers seems to be ubiquitous because the groundwaters sampled in El Fedjej and Nefzaoua basins exhibit bad water quality according to a number of toxicity indices. Geochemical data indicate that, on a regional scale, groundwater quality, salinity, and dissolved element concentrations are best correlated to petroleum contamination-extraction and to aquifer vulnerability to human perturbations rather than to multiple interactions within the hydrogeological system of the region.The analyses of petroleum compounds in sampled waters indicate that these waters are most consistent with increasing concentrations of organic pollutants; the organic matter is crude and unaltered, testifying to continuous flows of contaminants. The brine contamination, however, is limited to the Djemna water well where the water exhibits a salinity of 20 g L−1. Combined, these findings suggest that groundwater composition in CI water wells in Kebili field is influenced by the migration of hydrocarbons and brine-enriched waters through fractures, and (or) by aquifer decompression.

The role of water quality for local environmental policy implementation

The objective of this study is to examine the role of surface water quality for the decisions by Swedish municipalities to adopt environmental targets and action plans, as well as allocating these decisions to a responsible authority. To this end, we assess how environmental, socioeconomic, and political factors, as well as the availability of environmental expertise, affect these municipal decisions. Questionnaire data from the Swedish Association of Local Authorities and Regions, in combination with environmental monitoring data and official statistics, are used for the econometric analysis. Results show that: (i) municipalities with bad water quality, greater coastal length, and higher income are more inclined to adopt local policies; (ii) collaboration with interest groups increases the likelihood of adopting local policies; and (iii) municipalities with high Center Party representation tend to set responsibility for environmental policy with the municipal council board.

Assessment of shallow groundwater quality and its suitability for drinking purpose near the Béni-Mellal wastewater treatment lagoon (Morocco)

The present study aimed to evaluate the suitability for drinking purpose of shallow groundwater near the Béni-Mellal wastewater treatment lagoon based on various physicochemical, heavy metals, and bacteriological parameter analyses. The physicochemical results revealed that some of the samples do not comply with the Moroccan and/or WHO standards for drinking water. Parameters including turbidity, TH, Na+, Li+, Ba2+, Ca2+ (∼47.1% of samples), Cd (∼52.9% of samples), Fe (∼82.4% of samples), Pb (∼58.8% of samples), T. coliforms, and E. coli exceeded the drinking limits. The statistical analyses revealed that the shallow groundwater chemistry is mainly controlled by geogenic and anthropogenic sources. For quality assessment, using the Moroccan groundwater assessment grid, the values of EC and Cl–, NO3–, NH4+, oxidability, and E. coli, fixed as pollution indicators, showed that most of the wells showed medium-to-poor quality, 14% of them have a very poor water quality, and 20% of them belong to the bad water quality. According to geometric and arithmetic DWQI values, the groundwater quality was frequently fair to good, needing treatment or at least disinfection before public consumption. A sensitivity analysis results indicated that Fe, Cd, Cr, Pb, and E. coli have an important impact on the DWQI computing.

Spatial-temporal analysis of the surface water quality of the Pará River Basin through statistical techniques

Water quality issues are a growing concern due to the the recent intensification of urbanization and industrialization. This paper evaluates and compares the surface water quality of the ten sub-basins of the Pará River, located in the São Francisco River Basin, Minas Gerais, and evaluates the impact of seasonality and the compliance with the current limits of state legislation. The surface water quality monitoring database of the Institute of Water Management of Minas Gerais (Igam) was used, and 18 parameters were analyzed from a historical series from 2008 to 2016, totaling 16,651 observations. First, the descriptive statistics of the parameters were calculated, considering each sub-basin separately. Then, for the temporal and spatial analysis, the Kruskal-Wallis nonparametric statistical tests were applied, followed by the multiple comparison test, with an alpha level of 5%, due to the asymmetric behavior of the data. Thus, it was possible to compare water quality of the sub-basins in rainy and dry seasons and to identify which parameters were responsible for the greater degradation. In the compliance analysis to the current limits of state legislation, it was identified that all of the sub-basins were out of the specified range for at least one of the evaluated parameters. Finally, the seasonality analysis exposed significant differences in the parameters of dissolved oxygen, turbidity, total suspended solids, total solids and water temperature, where it was shown that there was a worsening of water quality in the rainy season for most sub-basins.