Comment by feverzsj

5 hours ago

EPA already set a Maximum Contaminant Level of 4.0 ppt. That's why they moved most PFAS production to China.

9 comments

feverzsj

In drinking water, yes. And the EPA coordinated a "voluntary" phase-out of PFAS in packaging, but it is not enforced.

Is there a limit in food, which is what this petition was about?

Another issue is that sewage sludge and "biosolids", unknowingly containing PFAS, is/was being used as farm fertilizer, causing some farms to have to be written off for food production. I would expect many more farms in the future to be found with PFAS soil levels exceeding what is safe to produce food with. The only way to find out is to test.

Maine listened to farmers and confronted the PFAS crisis - > The practice of spreading sludge as a soil amendment has been a common practice in Maine and across the nation for decades. Land application of sludge material occurred long before there was knowledge that it may contain PFAS or the health implications of PFAS.

EPA Fact Sheet: Draft Sewage Sludge Risk Assessment for PFOA and PFOS: Information for Farmers - https://www.epa.gov/system/files/documents/2025-01/fact-shee... - January 2025

EPA Basic Information about Biosolids:

appplication 5 hours ago

I have no issue repurposing biological waste as fertilizer, that’s fine. But sewage is not just biological waste. It’s got all sorts of other shit in it that’s not suitable for reentry into the food chain. This isn’t a practice that should be allowed anywhere. It’s not like they can’t grow crops without it, they’re just gaming costs.

toomuchtodo 5 hours ago

That's the challenge. The human waste stream is not just biological waste. It is PFAS, it is residual pharma and hormones the human body passes, it is recreational drugs, etc. It is not fit for reuse imho (as a layman, of course, but I believe the evidence strongly supports this assertion), it should be processed with plasma gasification to be made inert and the slag used in road/tarmac applications or landfilled. Why do we do not do that? Well, that costs money, money we are unwilling to spend (versus dumping a hazmat product onto ag land, because it is cheaper).
We learned this with BSE (why you don't feed cows to cows, prion contamination), we learned this with PFAS, we learn this a lot (ag supply chain weaknesses due to prioritizing cost over safety). We just don't seem to care enough to change the system. Caveat emptor.
InEnTec says its plasma technology effectively destroys PFAS - https://www.wastetodaymagazine.com/news/inentec-says-its-pla... - August 23rd, 2024
Biosolids: mix human waste with toxic chemicals, then spread on crops - https://www.theguardian.com/environment/2019/oct/05/biosolid... - October 5th, 2019
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
https://en.wikipedia.org/wiki/Bovine_spongiform_encephalopat...

SoftTalker 5 hours ago

I can't believe that we are still using sewage sludge as fertilizer. People dump anything down the drain. I remember this being an issue 30-40 years ago with PCBs.

toomuchtodo 5 hours ago

From industrial sources, in some cases, no less. Paper mills, tanneries, etc. Silver lining is that these farms are solar PV installations of the future, when possible, to give the land a few decades to recover from contamination. I presume you can pair this solar in an agrivoltaics model with grasses or other flora they can absorb and remediate subject contamination, but do not know enough to speak with authority on that.
Maine farmers impacted by PFAS pivot to harvesting solar power - https://www.newscentermaine.com/article/tech/science/environ... - August 22nd, 2024
> Maine farmland made worthless by PFAS chemicals could be put back into production again through harvesting the power of the sun.
> Last month, regulators approved new rules following 2023 state legislation that calls for renewable energy generated on contaminated land, clearing the way for the development of thousands of megawatts of new clean power.
(brownfields are a great place to cite solar generation)
EPA Brownfields Renewable Energy Siting - https://www.epa.gov/system/files/documents/2024-08/brownfiel...
NREL Solar Development on Contaminated and Disturbed Lands - https://web.archive.org/web/20250218192949/https://www.nrel....
Plant-based material can remediate PFAS, new research suggests - https://www.niehs.nih.gov/news/factor/2022/9/science-highlig...

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