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More states and countries lowering the acceptable lead limits in water in 2020.

More states and countries lowering the acceptable lead limits in water in 2020.

Filter manufacturers may need to revisit their lead reduction formulations to assure adequate performance and optimal efficiency.
5 ppb lead effluent is not only the new failure level in the updated 2019 version of NSF Standard 53, it is also becoming a more common regulatory ceiling.
The downward trend to lower limits is evident.

5 ppb in the USA:

Illinois (passed)
Maryland (proposed)
Missouri (proposed)
New York (proposed)
North Carolina (proposed)
Pennsylvania (proposed)
Washington (proposed)
Washington, D.C. (passed)

1 ppb in the USA:

Massachusetts (passed)
New Hampshire (proposed)

5 ppb Internationally:

China
South Korea

(Click on this link to download an Excel workbook from WQA for more details).