Sources of pathogens in water are primarily associated with which category?

Sources of pathogens in water are primarily associated with which category?

• A. Sediments
• B. Human and Animal Wastes
• C. Toxic Chemicals
• D. Major Water Pollutants

Answer: (B)

Pathogens in water mainly come from fecal contamination—waste from humans and animals entering water bodies. Sewage, septic effluent, livestock manure, and animal waste wash into streams and rivers, bringing disease-causing organisms like bacteria, viruses, and protozoa. Sediments can trap and transport these pathogens, but they are not the primary source themselves. Toxic chemicals are chemical contaminants, not pathogens, and “major water pollutants” is a broad label that doesn’t pinpoint the biological origin. So the main source category is human and animal wastes.

Pathogens in water mainly come from fecal contamination—waste from humans and animals entering water bodies. Sewage, septic effluent, livestock manure, and animal waste wash into streams and rivers, bringing disease-causing organisms like bacteria, viruses, and protozoa. Sediments can trap and transport these pathogens, but they are not the primary source themselves. Toxic chemicals are chemical contaminants, not pathogens, and “major water pollutants” is a broad label that doesn’t pinpoint the biological origin. So the main source category is human and animal wastes.