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GidMK's profile
Health Nerd
Health Nerd
Health Nerd
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@GidMK

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Health NerdVerified account

@GidMK

Epidemiologist. Writer (Guardian, Observer etc). "Well known research trouble-maker". PhDing at @UoW Host of @senscipod Email gidmk.healthnerd@gmail.com he/him

Sydney, New South Wales
theguardian.com/profile/gideon…
Joined November 2015

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    1. Health Nerd‏Verified account @GidMK 26 Sep 2019

      Health Nerd Retweeted ABC News

      Oh hey, it's fearmongering about PFAS day again This is pretty complex stuff, but the main message here is that it's MUCH less terrifying than the news makes it seem (THREAD)https://twitter.com/ABC/status/1177392686149640196 …

      Health Nerd added,

      ABC NewsVerified account @ABC
      Variants of the chemical PFAS, nicknamed the "forever chemical" because it does not break down once released into the environment, found in drinking water systems that serve about 7.5 million California residents, new report says. https://abcn.ws/2lpozer 
      1 reply 2 retweets 10 likes
      Show this thread
    2. Health Nerd‏Verified account @GidMK 26 Sep 2019

      The articles about Californian water poison are all based on a report released by the Environmental Working Group, which basically just collated EPA and California state water data into one document

      1 reply 0 retweets 1 like
      Show this thread
    3. Health Nerd‏Verified account @GidMK 26 Sep 2019

      The Environmental Working Group (EWG) is an unapologetically industry-funded organisation that tends to be against industrial chemicals of any kind (for example they are fiercely anti-GMO)pic.twitter.com/0IZKr4OYpJ

      1 reply 0 retweets 2 likes
      Show this thread
    4. Health Nerd‏Verified account @GidMK 26 Sep 2019

      What did the EWG find? Well, they collated a bunch of measurements taken across California over the last 10 years or so, and found amounts of PFAS ranging from 1.1-820.8 parts per trillion

      1 reply 0 retweets 0 likes
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      Health Nerd‏Verified account @GidMK 26 Sep 2019

      The reference for PFAS from the EPA, as well as a number of other international agencies, is 70 parts per trillion Immediately, this makes the headline less scarypic.twitter.com/PHSoOWTLUV

      9:23 PM - 26 Sep 2019
      • 1 Like
      • 💧 Ian "Department of Diseasology" 🍩 Musgrave
      1 reply 0 retweets 1 like
        1. New conversation
        2. Health Nerd‏Verified account @GidMK 26 Sep 2019

          This cutoff of 70 parts per trillion is a very conservative estimate, based on the lowest level that PFAS have ever been demonstrated to cause negative effects in a controlled study, divided by a wide safety margin

          1 reply 0 retweets 1 like
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        3. Health Nerd‏Verified account @GidMK 26 Sep 2019

          About 2/3 of all of the measurements that the EWG report are below this threshold - in other words, most of California's water is SAFE based on the EWG's publication

          1 reply 0 retweets 1 like
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        4. Health Nerd‏Verified account @GidMK 26 Sep 2019

          But it's even dicier than that You see, the EWG report the MAXIMUM levels of PFAS found in each of these locationspic.twitter.com/laYShHRqze

          1 reply 0 retweets 1 like
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        5. Health Nerd‏Verified account @GidMK 26 Sep 2019

          If you have a look at many of these locations, you can see that the average levels are much lower - you can see them here https://sdwis.waterboards.ca.gov/PDWW/index.jsp 

          1 reply 0 retweets 1 like
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        6. Health Nerd‏Verified account @GidMK 26 Sep 2019

          Also, the EWG only reports selected well results, rather than the average of PFAS across each area This may not be representative of the water quality across the regions they picked!

          1 reply 0 retweets 1 like
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        7. Health Nerd‏Verified account @GidMK 26 Sep 2019

          On top of all of this, there's the fact that we still aren't actually sure that PFAS do cause all of these problems, even at the reference dose (that's why it's not legally enforceable)

          1 reply 0 retweets 1 like
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        8. Health Nerd‏Verified account @GidMK 26 Sep 2019

          TL:DR - There were some PFAS found in some places in California - Mostly much less than the EPA/CDC reference dose - Dose makes the poison - Your water is probably fine

          1 reply 0 retweets 4 likes
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        9. Health Nerd‏Verified account @GidMK 26 Sep 2019

          Oh also, because it's annoying, PFAS is not one chemical, it's a group of them (the S stands for "substances")

          0 replies 0 retweets 4 likes
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        10. End of conversation

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