Unsafe at any level! If the current administration’s Environmental Protection Agency [ EPA ] has its way, if any ambient-air dust is found inside an apartment building then that would require property owners to perform exceptionally expensive remediation.
Hey, come on, it's the EPA and they are "Still crazy after all these years." Don't take my word for it, here it is in the NY Times: "The Biden administration said Thursday that it was strengthening requirements for homes and child-care facilities to remove lead-based paint dust, a move that could better protect more than 300,000 children a year from the toxic metal. Under the new rules, any detectable level of lead dust in the building would be considered a"lead hazard," and property owners would be required to pay for cleanup.
The EPA says "Any detectable level of lead dust in the building".
How much lead - what level - is found in the ambient atmosphere? Naturally, it varies a great deal, but as for air pollution, the "National Trends in Lead Concentrations in 2010 - 2023" for the USA shows a level of just over 0.025 ug/m3.
In Europe, soil levels of lead are measured in nanograms/m3, and found at 25-35 ng/m3, which is the same.
According to a press release from MIT "Testing for lead in water requires expensive, cumbersome equipment and typically requires days to get results. Or, it uses simple test strips that simply reveal a yes-or-no answer about the presence of lead but no information about its concentration. Current EPA regulations require drinking water to contain no more that 15 parts per billion of lead, a concentration so low it is difficult to detect." The new testing system being developed as discussed in that press release expects to be capable of detecting lead concentrations "As low as 1 part per billion".
The air around you probably has detectable levels of lead in it.
If the water in your home is likely to have detectable lead levels, and the dust in the air outside your home has detectable lead levels, how is it possible to lower the lead levels inside your home to "No detectable level"?
https://wattsupwiththat.com/2024/10/26/epa-proposes-yet-another-impossible-standard/
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