Microbiological status of drinking water sources and its relationship with human health in Solan, India

2021 ◽  
Vol 193 (1) ◽  
Author(s):  
Ajay Kumar Singh ◽  
Satish Kumar Bhardwaj ◽  
Sunita Devi
2014 ◽  
Vol 37 (3) ◽  
pp. 475-490 ◽  
Author(s):  
Yusuf Uras ◽  
Yagmur Uysal ◽  
Tugba Atilan Arikan ◽  
Alican Kop ◽  
Mustafa Caliskan

Author(s):  
Minhaz Farid Ahmed ◽  
Chen Kim Lim ◽  
Mazlin Bin Mokhtar ◽  
Rd. Puteri Khairani Khirotdin

Chemical pollution in the transboundary Langat River in Malaysia is common both from point and non-point sources. Therefore, the water treatment plants (WTPS) at the Langat River Basin have experienced frequent shutdown incidents. However, the Langat River is one of the main sources of drinking water to almost one-third of the population in Selangor state. Meanwhile, several studies have reported a high concentration of Arsenic (As) in the Langat River that is toxic if ingested via drinking water. However, this is a pioneer study that predicts the As concentration in the Langat River based on time-series data from 2005–2014 to estimate the health risk associated with As ingestion via drinking water at the Langat River Basin. Several time-series prediction models were tested and Gradient Boosted Tree (GBT) gained the best result. This GBT model also fits better to predict the As concentration until December 2024. The mean concentration of As in the Langat River for both 2014 and 2024, as well as the carcinogenic and non-carcinogenic health risks of As ingestion via drinking water, were within the drinking water quality standards proposed by the World Health Organization and Ministry of Health Malaysia. However, the ingestion of trace amounts of As over a long period might be detrimental to human health because of its non-biodegradable characteristics. Therefore, it is important to manage the drinking water sources to minimise As exposure risks to human health.


2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Marin Senila ◽  
Erika Levei ◽  
Oana Cadar ◽  
Lacrimioara Ramona Senila ◽  
Marius Roman ◽  
...  

Mobilization of As from geological materials into ground and drinking water sources may represent an important threat to human health. The objective of this study was to assess the As concentration and availability in underground water used as drinking water sources. Water samples were collected from public and private wells in Timis-Bega area of Pannonian Basin, West Romania. Total-dissolved As measured after “classical” filtration of water samples was in the range of 0.10–168 μg L−1, thus exceeding the guideline value in majority of the samples. The aim of this study was also to assess the “truly dissolved” concentrations of As considered as available concentrations, in well waters, after passive sampling by Diffusive Gradients in Thin-films (DGT). The results showed that over 70% of total-dissolved As is in available forms. The obtained data were used to evaluate the risks of using the wells as drinking water source. Hazard quotients for ingestion and dermal pathways and hazard index (HI) for exposure to As were calculated. The HI values > 1 found that majority of samples indicated a health risk for local residents.


2015 ◽  
Vol 538 ◽  
pp. 306-316 ◽  
Author(s):  
Avit Kumar Bhowmik ◽  
Ambreen Alamdar ◽  
Ioannis Katsoyiannis ◽  
Heqing Shen ◽  
Nadeem Ali ◽  
...  

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Jianyong Wu ◽  
Elizabeth D. Hilborn ◽  
Blake A. Schaeffer ◽  
Erin Urquhart ◽  
Megan M. Coffer ◽  
...  

Abstract Background The occurrence of cyanobacterial blooms in freshwater presents a threat to human health. However, epidemiological studies on the association between cyanobacterial blooms in drinking water sources and human health outcomes are scarce. The objective of this study was to evaluate if cyanobacterial blooms were associated with increased emergency room visits for gastrointestinal (GI), respiratory and dermal illnesses. Methods Satellite-derived cyanobacteria cell concentrations were estimated in the source of drinking water for the Greater Boston area, during 2008–2011. Daily counts of hospital emergency room visits for GI, respiratory and dermal illnesses among drinking water recipients were obtained from an administrative record database. A two-stage model was used to analyze time-series data for an association between cyanobacterial blooms and the occurrence of illnesses. At the first stage, predictive autoregressive generalized additive models for Poisson-distributed outcomes were fitted to daily illness count data and daily predictive variables. At the second stage, residuals from the first stage models were regressed against lagged categorized cyanobacteria concentration estimates. Results The highest cyanobacteria concentration (above the 75th percentile) was associated with an additional 4.3 cases of respiratory illness (95% confidence interval: 0.7, 8.0, p = 0.02, n = 268) compared to cyanobacteria concentrations below the 50th percentile in a two-day lag. There were no significant associations between satellite derived cyanobacterial concentrations and lagged data on GI or dermal illnesses. Conclusion The study demonstrated a significant positive association between satellite-derived cyanobacteria concentrations in source water and respiratory illness occurring 2 days later. Future studies will require direct measures of cyanotoxins and health effects associated with exposure to cyanobacteria-impacted drinking water sources.


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