Sewage Management Bacteria Levels Chemical Contaminants E. coli Seine River River Management Impact on Sports Bacteria River Health E. coli Contamination Sewage Contamination Sewage Pollution Waste Management Faecal Contamination Biological Oxygen Demand Wastewater Management River Seine Public Health Bacterial Contamination Sewage Discharge E. coli Bacteria E. coli Levels River Pollution Olympic Events Sewage Systems Sewage Spills Urban Areas Bathing Waters Sewage Treatment Ammonia Contamination Ammonia Levels Yamuna River Fecal Coliform E. Coli Waterborne Pathogens Sedimentation Cleanup Efforts Urban Waterways Algal Blooms Health Risks Fecal Contamination Impact on Sports Events Public Health Emergency Ganga River River Cleanup Toxic Chemicals Wastewater Treatment Lead in Water Religious Sites Water Pollution Contaminated Resources Nutrient Runoff Water Monitoring Coastal Pollution Chemical Spills Storm Overflows Zwingerteich Conservation Groundwater Protection Sewage Enforcement Waterways Effects on Wildlife Faecal Pollution Chemical Contamination Cleaning Efforts Industrial Waste Regulation Contamination Pesticides Bathing Sites Impact of Weather Sewage Overflow River Cleanliness E.coli Meteorological Events Urban Infrastructure Infrastructure Improvements Lead Contamination Urban Water Management Sewer System