Standards related to the protection of public health.
Aqueous pH buffer solutions established by the National Bureau of Standards within the 2.5 to 11.5 pH range of ionic strength less than 0.1 and which provide stable liquid junction potential and uniformity of electrode sensitivity.
Regulatory standards that place limits on drinking-water contaminants posing a risk to health, including radiation, coliform bacteria, and sulfates.
Regulations of the 1970 Clean Air Act; intended to protect human health.