National Primary Drinking Water Regulations

Organic Chemicals Contaminant MCLG 1 (mg/L)2 MCL  orTT 1 (mg/L)2 Potential Health Effects Sources of Contaminant in Drinking Water Acrylamide zero TT8 Nervous system or blood problems; increased risk of cancer Added to water during sewage/wastewater ...

Radionuclides Contaminant MCLG 1 (mg/L)2 MCL  orTT 1 (mg/L)2 Potential Health Effects Sources of Contaminant in Drinking Water Alpha particles none7  ---------- zero 15 picocuries per Liter (pCi/L) Increased risk of cancer Erosion of natural d...

Disinfectants Contaminant MCLG 1 (mg/L)2 MCL  orTT 1 (mg/L)2 Potential Health Effects Sources of Contaminant in Drinking Water Chloramines (as Cl2 ) MRDLG=41 MRDL=4.01 Eye/nose irritation; stomach discomfort, anemia Water additive used to control ...

Contaminant MCLG 2 MCL  or TT 2 Potential Health Effects* Sources of Contaminants Cryptosporidium zero TT3 Gastrointestinal illness (e.g., diarrhea, vomiting, cramps) Human and animal fecal waste Giardia lamblia zero TT3 Gastrointestinal illness (...

Contaminant MCLG 2 MCL  or TT 2 Potential Health Effects Sources of Contaminants Bromate zero 0.010 Increased risk of cancer Byproduct of drinking water disinfection Chlorite 0.8 1.0 Anemia; infants & young children: nervous system effects B...

Contaminant MCLG 2 MCL  or TT 2 Potential Health Effects* Sources of Contaminants Antimony 0.006 0.006 Increase in blood cholesterol; decrease in blood sugar Discharge from petroleum refineries; fire retardants; ceramics; e...