| Contaminants | Limits | Sources | Potential Health Effect |
| Lead | 0.15 mg/L | Erosion of natural resources, household plumbing corrosion | Birth Defects, Infant Mortality, Down Syndrome, Kidney Disease |
| Copper | 1.3 mg/L | Corrosion of household plumbing, erosion of natural deposits, leaching of wood preservatives | Nausea, Headache, Nose Bleeds, Liver Damage, Fatal Hemolysis Vomiting, Diarrhea, Stomach Cramps |
| Residual Chlorine | 4 mg/L | Disinfectant added to control pathogens | Nervous System Damage, Anemia, Methemoglobinemia |
| Trihalomethane: chloroform bromodichloromethane dibromochloromethane bromoform | 80 mg/L | By-product of water chlorination | Cancer, Liver Disease, Kidney Failure, Nervous System Damage, Bladder Cancer, Colorectal Cancer, Adverse development, and reproductive effects during pregnancy |
| Haloacetic Acids: trichloroacetic acid dichloroacetic acid monochloroacetic acid dibromoacetic acid monobromoacetic acid | 60 mg/L | By-product of water chlorination | Cancer, Liver Disease, Kidney Failure, Spleen Damage, Bladder Cancer, Colorectal Cancer, Adverse development, and reproductive effects during pregnancy |
| Total Organic Carbon | 2% | Naturally present in the environment | Cancer, Chemical Carcinogens, Chills, Fever, Shock, Adverse development, and reproductive effects during pregnancy |