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Simpson IM, Schwartz JS, Hathaway JM, Winston RJ. Environmental regulations in the United States lead to improvements in untreated stormwater quality over four decades. WATER RESEARCH 2023; 243:120386. [PMID: 37494741 DOI: 10.1016/j.watres.2023.120386] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 07/05/2023] [Accepted: 07/17/2023] [Indexed: 07/28/2023]
Abstract
Identifying sources of pollutants in watersheds is critical to accurately predicting stormwater quality. Many existing software used to model stormwater quality rely on decades-old data sets which may not represent current runoff quality in the United States. Because of environmental regulations promulgated at the federal level over previous decades, there is a need to understand long-term trends (and potential shifts) in runoff quality to better parameterize models. Pollutant event mean concentrations (EMCs) from the National Stormwater Quality Database (NSQD) were combined with those from recent sources to understand if untreated stormwater quality has changed over the past 40 years. A significant decreasing monotonic trend (i.e., continually decreasing in a nonuniform fashion) was observed for total suspended solids (TSS), total phosphorus (TP), total Kjeldahl nitrogen (TKN), total copper (Cu), total lead (Pb), and total zinc (Zn) in the resultant database, suggesting that runoff quality has become less polluted with time. Median EMCs decreased from 99.2 to 42 mg/L, 0.34 to 0.26 mg/L, 1.27 to 1.03 mg/L, 40 to 6.8 µg/L, 110 to 3.7 µg/L, and 375 to 53.3 µg/L for TSS, TP, TN, Cu, Pb, and Zn, respectively, from the 1980s to the 2010s. These significant reductions often aligned temporally with advancements in clean manufacturing, amendments of the Clean Air Act, and other source control efforts which impact pollutant bioavailability and atmospheric deposition. Results suggest environmental regulations not specifically targeting stormwater management have had a positive impact on stormwater quality and that temporal fluctuations should be considered in modeling.
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Affiliation(s)
- Ian M Simpson
- Tennessee Water Resources Research Center, University of Tennessee, Knoxville, 600 Henley Street Suite 311, Knoxville, TN 37902, United States.
| | - John S Schwartz
- Tennessee Water Resources Research Center, University of Tennessee, Knoxville, 600 Henley Street Suite 311, Knoxville, TN 37902, United States; Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, 851 Neyland Dr., Knoxville, TN 37916, United States
| | - Jon M Hathaway
- Tennessee Water Resources Research Center, University of Tennessee, Knoxville, 600 Henley Street Suite 311, Knoxville, TN 37902, United States; Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, 851 Neyland Dr., Knoxville, TN 37916, United States
| | - Ryan J Winston
- Department of Food, Agricultural, and Biological Engineering, The Ohio State University, 590 Woody Hayes Dr., Columbus, OH 43210, United States; Department of Civil, Environmental, and Geodetic Engineering, The Ohio State University, 2070 Neil Ave., Columbus, OH 43210, United States
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Zergui A, Boudalia S, Joseph ML. Heavy metals in honey and poultry eggs as indicators of environmental pollution and potential risks to human health. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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Sangaré LO, Ba S, Diallo O, Sanogo D, Zheng T. Assessment of potential health risks from heavy metal pollution of surface water for drinking in a multi-industry area in Mali using a multi-indices approach. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:700. [PMID: 37209278 DOI: 10.1007/s10661-023-11258-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 04/17/2023] [Indexed: 05/22/2023]
Abstract
The Niger River, Bamako's population's primary drinking water source, is threatened by human activities. This study examines the Niger River pollution trend using heavy metals pollution indexes and Bamako's population's non-carcinogenic and carcinogenic related health risks. Parameters were monitored at fifteen sampling locations in low and high flow seasons. pH (7.30-7.50) and fluoride (0.15-0.26 mg/L) were within the normal drinking water range. Among seven heavy metals (copper, zinc, cadmium, nickel, iron, manganese, and lead), the latter three were above the drinking water standard. The degree of contamination was negative, pointing to better water quality. However, the heavy metal evaluation index (HEI) was below the mean (5.88), between the mean and twice the mean, indicating a low and medium degree of pollution. Besides, heavy metal pollution indexes (HPI) were above the standard value (100), explaining a low-medium pollution level. High values of HPI could be explained by the industrial units' intensive activities coupled with the runoff effect. The hazard index (HI) indicated a low and medium non-carcinogenic health risk for adults and children. The probability of cancer risk (PCR) of nickel showed a cancer risk. Therefore, the river was polluted with trace elements and could not be used for drinking water without any treatment.
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Affiliation(s)
- Lamine Ousmane Sangaré
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
- Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem, Harbin Institute of Technology, Harbin, 150090, China
| | - Sidy Ba
- Department of Geology and Mines, Ecole Nationale d'Ingénieurs Abderhamane Baba Touré (ENI-ABT), 410, Avenue Van Vollenhoven, BP 242, Bamako, Mali
| | - Oumou Diallo
- Laboratoire d Etude Et de Recherche Des Ressources Naturelles Et Des Sciences de L environnement (LERNSE), Université Nazi Boni de Bobo Dioulasso, 01 BP 1091, Bobo Dioulasso, Burkina Faso
| | - Diakalia Sanogo
- Direction Nationale de L'Industrie (DNI), Ministère du Commerce Et de L'industrie, BP 278, Bamako, Mali
| | - Tong Zheng
- School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China.
- Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem, Harbin Institute of Technology, Harbin, 150090, China.
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Pang X, Gao Y, Guan M. Linking downstream river water quality to urbanization signatures in subtropical climate. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 870:161902. [PMID: 36736411 DOI: 10.1016/j.scitotenv.2023.161902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 01/13/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
Urbanization has several hydro-ecological effects on receiving waters. Hence, understanding how urbanization influences river water quality is essential for proper river management. However, an inappropriate approach that correlates urbanization signatures with water quality may result in spurious correlations. This study aimed to investigate the relationship of urbanization signatures with two key pollutants of stream flows: nutrients and pathogens. In contrast to the commonly used approaches that are based on economic or demographic metrics, our approach represents urbanization signatures using related anthropogenic activities and evaluates the effect of such activities on water quality parameters. The approach was also applied to evaluate the impacts of urbanization on nutrient and pathogen trends in the river waters of Hong Kong. The data were collected for the period of 1986-2020 from the Environmental Protection Department and monthly measurements were performed. Total nitrogen (TN), total phosphorus (TP), Escherichia. coli (E. coli), and fecal coliforms (FC) showed consistently decreasing trends. However, the long-term seasonality of nutrients differed from that of pathogens. TP and TN exhibited homogenous seasonality with an approximately sinusoidal relationship from January to December, whereas the seasonality of pathogens was more complex and not dependent on river flow dilution effects. Additionally, urbanization impacts on station nutrients and pathogen characteristics were found to be unevenly distributed; under high water temperatures, nutrient concentrations were found to be decreased because of the rainfall dilution effect on river flows. Both urban point and diffuse sources of pollution significantly contributed to nutrient pollution in rivers. Furthermore, the concentrations of FC were not highly influenced by suspended solids, and dissolved oxygen was negatively correlated with all pathogens. Furthermore, the river flow rate was found to improve the water quality in terms of both nutrients and pathogens; urban point source pollution and river temperature alteration were shown to mainly contribute to seasonal variations in both nutrients and pathogens.
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Affiliation(s)
- Xuan Pang
- Department of Civil Engineering, the University of Hong Kong, Hong Kong
| | - Yao Gao
- Department of Civil Engineering, the University of Hong Kong, Hong Kong; Finnish Meteorological Institute, Helsinki 00101, P.O. Box 503, Finland
| | - Mingfu Guan
- Department of Civil Engineering, the University of Hong Kong, Hong Kong.
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Special Issue on Applied Research on Water Treatment by Onsite Wastewater Management and Agricultural and Stormwater Control Measures at Varying Spatial Scales. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12073670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Human population growth has led to increased wastewater generation and discharges, land clearing and fertilization for food production, and impervious surfaces associated with housing and road construction [...]
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