In 1974, Congress passed the Safe Drinking Water Act. This law requires the Environmental Protection Agency (EPA) to determine safe levels of chemicals in drinking water which do or may cause health problems.
READ more EPA information about lead regulations here.
Since lead contamination generally occurs from corrosion of household lead pipes, it cannot be directly detected or removed by the water system. These drinking water standards and the regulations for ensuring these standards are met, are called National Primary Drinking Water Regulations.
If the levels of lead exceed the regulatory Action Level, which is set at 15 parts per billion (ppb), the SFPUC will deliver public education materials on lead via newspapers, radio, TV and other means. Customers will be informed of what they can do at home to lower their exposure to lead. Additional actions may be required to prevent serious risks to public health.