Nitrates: ground water.
D003490:Cyanosis / Q000139:chemically induced; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008708:Methemoglobinemia / Q000139:chemically induced; D009566:Nitrates / Q000506:poisoning*; D014873:Water Pollutants / Q000506:poisoning*; D014874:Water Pollutants, Chemical / Q000506:poisoning*; D014881:Water Supply / Q000032:analysis
D009566:Nitrates; D014873:Water Pollutants; D014874:Water Pollutants, Chemical