Microbial Quality of Water Supply in Distribution Systems

About this book

Hidden problems, buried deep in the pipe networks of water distribution systems, are very serious potential threats to water quality. Microbial Quality of Water Supply in Distribution Systems outlines the processes and issues related to the degradation of water quality upon passage through networks of pipes, storage reservoirs, and standpipes on its way to the consumer. The risks associated with biofilm accumulation, bacteria, and other contaminants are discussed in great detail. In addition to its excellent microbiological coverage of organisms in drinking water and biofilms in distribution systems, Microbial Quality of Water Supply in Distribution Systems provides clear treatments of the technical and public communication issues most commonly affecting the quality of water and water supply systems. The inclusion of numerous case histories in this new book makes it a complete reference source for anyone concerned with water quality and water distribution systems.

Contents

Characterizing the Distribution System: Microbial IssuesDistribution System HabitatsDistribution Water Temperature TrendsWater Supply Transient TimeOperational FactorsJoint Responsibility for Water QualityCreating Microbial Quality in Drinking WaterRaw SourceMicrobial CompositionMicrobial Control through TreatmentWater Supply Storage and DistributionBuilding Plumbing NetworksAttachment DevicesBiological Profiles in Drinking WaterPrimary Microbial GroupsFree-Living Amoeba and Macroinvertebrates: Protectors and Amplifiers of BacteriaOpportunistic Organisms and the Water Supply ConnectionBiofilms in Water Distribution SystemsCharacterizing BiofilmNutrients: A Case for Biological Instability of Water SupplyWater Temperature StimulationPhysical Status of Pipe SedimentsScenarios for Undetected Coliform PassagesEvaluating the Public Health Significance of BiofilmCharacterizing Microbial Quality in Water SupplyIntroductionHeterotrophic BacteriaColiform DetectionSubstitute Criteria: A Word of CautionNuisance OrganismsInfrastructure Construction AcceptanceLaboratory Credibility through CertificationMonitoring Strategies to Characterize Water QualityIntroductionEvaluating the StrategySample Collection and Sample Stability in TransitSpecial Considerations - Small Systems Networks; Large System Characteristics; Consolidated SystemsColiform Occurrences in Compliance MonitoringSpecial Purpose MonitoringMicrobial Breakthroughs in Changing Source, Treatment, or Supply ParametersIntroductionFactoring Source Water CharacteristicsPlant Operating PracticesTreatment ModificationsDisinfection AlternativesImpacts on Distribution Water QualityWaterborne Pathogen Invasions: A Case for Water Quality Protection in DistributionCharacterizing Freshwater QualityWaterborne Pathogenic AgentsUtilizing Multiple Barriers to Pathogen PassageWaterborne Pathogen Invasions: Case History ExamplesPathogen Search in Waterborne OutbreaksIn Retrospect - Municipal Sewage Collection Systems; Stormwater Runoff; Non-Metered Service; Unaccounted Water Losses; Water Storage Tank Structures; System Flushing; Distribution Residuals; Water PressureResponses to Microbial Quality Changes in Water Supply DistributionLaboratory AssistanceInitial Action ResponsesPersistent Non-Compliance ResponseSanitary Survey ApproachSearching for Risks in Water SupplyIn RetrospectPublic Awareness of Water Quality ProblemsPublic Perception of Health Risks in Water SupplyMass Media and Public AwarenessA Study of Media Attention to Technical RealityPublic Relations ProgramsPublic Awareness: What Have We Learned Appendix: Field Investigation Check ListIndex

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