Exemptions are made according to aesthetically based allowable levels, and do not relate to health concerns.
Regulators have not set standards for allowable levels of pesticides in soft drinks.
The city, however, states that the metal levels are well below the federal allowable levels.
But the rule proposed in 1997 would sharply reduce allowable levels for particles less than 2.5 microns across.
The lead released builds up over time and can reach 100 times the allowable level after weeks or months, Canadian researchers said.
After an allowable level of take is determined, the applicant may begin to prepare the mitigation program.
But agency officials said a new rule would definitely call for a reduction of at least 60 percent from current allowable levels.
It will also reduce the allowable levels of emissions that contribute to acid rain and air pollution.
The President would also let auto makers "average" the pollution of all cars rather than keep each car below allowable levels.
New Jersey's allowable level of these salts in drinking water is 500 parts per million.