Microbial Contaminant
Coliform Bacteria in Drinking Water
EPA Maximum Limit
0 per 100 mL
presence/absence
EPA Contaminant Code
3100
SDWIS reference
Health Effects
Indicates potential contamination by pathogens. Can cause gastrointestinal illness.
Common Sources
Human and animal fecal matter. Often enters water through cracked pipes or flooding.
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