Cosmolab Laboratories Inc.

Deep well water can be a health risk if it's contaminated with bacteria, heavy metals, or other chemicals. The risk of illness depends on the type and amount of contaminant, and how long you've been exposed.
Contaminants
Bacteria: Can cause stomach issues, diarrhea, and nausea. Examples include E. coli, VTEC, and Salmonella.
Heavy metals: Can cause acute and chronic toxicity, liver and kidney damage, anemia, and cancer.
Organic chemicals: Can damage the kidneys, liver, circulatory system, nervous system, and reproductive system.
Radionuclides: Can cause toxic kidney effects and increase the risk of cancer.
Nitrates: Can cause stomach issues, diarrhea, and nausea.
Sources of contamination
Leaks from landfills, septic systems, or underground fuel tanks
Fertilizers or pesticides
Water runoff from cities or industrial buildings
P**p from animal feedlots
Soil and rock that don't filter the water properly
Small animals or debris in the well
Who's at risk? Small children, Pregnant women, Elderly people, and People with compromised immune systems