Nitrates in Drinking Water

Nitrates in Drinking Water: "NITRATES IN DRINKING WATER
Although low levels of nitrates may occur naturally in water, sometimes higher levels, which are potentially dangerous to infants, are found. Illinois has adopted a drinking water standard for nitrate of 10 milligrams per liter (10 mg/l) as N (nitrogen). This standard is mandatory for public water supplies and is used as a guide for private water supplies. The U.S. Environmental Protection Agency also uses 10 mg/l as N as a mandatory national standard for public supplies under the Safe Drinking Water Act. The 10 mg/l standard expressed as nitrogen (N) is equivalent to 45 mg/l expressed as nitrate."