scholarly journals Microbial Community Profile of a Lead Service Line Removed from a Drinking Water Distribution System

2011 ◽  
Vol 77 (15) ◽  
pp. 5557-5561 ◽  
Author(s):  
Colin White ◽  
Matthew Tancos ◽  
Darren A. Lytle
Keyword(s):  
Drinking Water ◽  
Microbial Community ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Rrna Gene ◽  
Drinking Water Distribution System ◽  
Service Line ◽  
Drinking Water Distribution ◽  
Microbial Community Profile

ABSTRACTA corroded lead service line was removed from a drinking water distribution system, and the microbial community was profiled using 16S rRNA gene techniques. This is the first report of the characterization of a biofilm on the surface of a corroded lead drinking water service line. The majority of phylotypes have been linked to heavy-metal-contaminated environments.

Microbial Community Response to Chlorine Conversion in a Chloraminated Drinking Water Distribution System

2014 ◽  
Vol 48 (18) ◽  
pp. 10624-10633 ◽  
Author(s):  
Hong Wang ◽  
Caitlin R. Proctor ◽  
Marc A. Edwards ◽  
Marsha Pryor ◽  
Jorge W. Santo Domingo ◽  
...  
Keyword(s):  
Drinking Water ◽  
Microbial Community ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Community Response ◽  
Drinking Water Distribution System ◽  
Drinking Water Distribution

scholarly journals Bacterial composition in a metropolitan drinking water distribution system utilizing different source waters

2014 ◽  
Vol 13 (1) ◽  
pp. 140-151 ◽  
Author(s):  
Vicente Gomez-Alvarez ◽  
Ben W. Humrighouse ◽  
Randy P. Revetta ◽  
Jorge W. Santo Domingo
Keyword(s):  
Drinking Water ◽  
Community Structure ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Rrna Gene ◽  
Drinking Water Distribution System ◽  
Bacterial Composition ◽  
Service Areas ◽  
Drinking Water Distribution

We investigated the bacterial composition of water samples from two service areas within a drinking water distribution system (DWDS), each associated with a different primary source of water (groundwater, GW; surface water, SW) and different treatment process. Community analysis based on 16S rRNA gene clone libraries indicated that Actinobacteria (Mycobacterium spp.) and α-Proteobacteria represented nearly 43 and 38% of the total sequences, respectively. Sequences closely related to Legionella, Pseudomonas, and Vibrio spp. were also identified. In spite of the high number of sequences (71%) shared in both areas, multivariable analysis revealed significant differences between the GW and SW areas. While the dominant phylotypes where not significantly contributing in the ordination of samples, the populations associated with the core of phylotypes (1–10% in each sample) significantly contributed to the differences between both service areas. Diversity indices indicate that the microbial community inhabiting the SW area is more diverse and contains more distantly related species coexisting with local assemblages as compared with the GW area. The bacterial community structure of SW and GW service areas were dissimilar, suggesting that their respective source water and/or water quality parameters shaped by the treatment processes may contribute to the differences in community structure observed.

Persistence and decontamination of surrogate radioisotopes in a model drinking water distribution system

2009 ◽  
Vol 43 (20) ◽  
pp. 5005-5014 ◽  
Author(s):  
Jeffrey G. Szabo ◽  
Christopher A. Impellitteri ◽  
Shekar Govindaswamy ◽  
John S. Hall
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Drinking Water Distribution System ◽  
Drinking Water Distribution

VULNERABILITY ASSESSMENT OF A DRINKING WATER DISTRIBUTION SYSTEM

2007 ◽  
Vol 2007 (1) ◽  
pp. 449-467
Author(s):  
Stacia L. Thompson ◽  
Elizabeth Casman ◽  
Paul Fischbeck ◽  
Mitchell J. Small ◽  
Jeanne M. VanBriesen
Keyword(s):  
Drinking Water ◽  
Vulnerability Assessment ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Drinking Water Distribution System ◽  
Drinking Water Distribution

scholarly journals The Seasonality of Nitrite Concentrations in a Chloraminated Drinking Water Distribution System

2018 ◽  
Vol 15 (8) ◽  
pp. 1756 ◽  
Author(s):  
Pirjo-Liisa Rantanen ◽  
Ilkka Mellin ◽  
Minna Keinänen-Toivola ◽  
Merja Ahonen ◽  
Riku Vahala
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Tap Water ◽  
Drinking Water Distribution System ◽  
Ammonium Oxidation ◽  
Water Age ◽  
Sampling Campaign ◽  
Drinking Water Distribution

We studied the seasonal variation of nitrite exposure in a drinking water distribution system (DWDS) with monochloramine disinfection in the Helsinki Metropolitan Area. In Finland, tap water is the main source of drinking water, and thus the nitrite in tap water increases nitrite exposure. Our data included both the obligatory monitoring and a sampling campaign data from a sampling campaign. Seasonality was evaluated by comparing a nitrite time series to temperature and by calculating the seasonal indices of the nitrite time series. The main drivers of nitrite seasonality were the temperature and the water age. We observed that with low water ages (median: 6.7 h) the highest nitrite exposure occurred during the summer months, and with higher water ages (median: 31 h) during the winter months. With the highest water age (190 h), nitrite concentrations were the lowest. At a low temperature, the high nitrite concentrations in the winter were caused by the decelerated ammonium oxidation. The dominant reaction at low water ages was ammonium oxidation into nitrite and, at high water ages, it was nitrite oxidation into nitrate. These results help to direct monitoring appropriately to gain exact knowledge of nitrite exposure. Also, possible future process changes and additional disinfection measures can be designed appropriately to minimize extra nitrite exposure.

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