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It seems like the half-life in water is less than that in soil: >* From literature studies, glyphosate’s half-life in surface waters and soil ranges from 2 to

It seems like the half-life in water is less than that in soil: >* From literature studies, glyphosate’s half-life in surface waters and soil ranges from 2 to 91 days and from 2 to 215 days, respectively (Battaglin et al. 2014; Castro Berman et al. 2018). * https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8827352/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8827352/

toomuchtodo 3y ago
An actived carbon filter will remove ~99.9% of Glyphosate from water, if for human consumption. (source water from a ~100ft deep water table next to a large ag plot at a property, have both pre and post filter water tested to validate filtration effectiveness)
- cj 3y ago
  Any recommendations for where to get water tested for uncommon contaminants?
  - deleted 3y ago
    [deleted]
  - toomuchtodo 3y ago
    Your local university extension should be able to provide this service at a reasonable cost ($100-$500, depending on what is being tested for). There are commercial water testing firms, but I do not have experience with any that I could recommend. https://www.nifa.usda.gov/about-nifa/how-we-work/extension https://www.nifa.usda.gov/about-nifa/how-we-work/extension https://www.isws.illinois.edu/health-environmental-applications/home-water-testing https://www.isws.illinois.edu/health-environmental-applicati...
    - giantg2 3y ago
      Instead of testing for every one-off thing that comes up, maybe just go with a small reverse osmosis system for a similar price range.
      - toomuchtodo 3y ago
        A quality iron/hydrogen sulfide water filter sets you back about $2k, and will last ~10 years or ~500k gallons. If you do not have this in your water, you can safely skip. High iron can lead to iron reducing bacteria scumming up fixtures and, more importantly, rapidly dissolving a hot water heater tank. If you smell sulfur in your hot water when you shower on a well, that bacteria is eating up your tank's anode rod quicker than normally would (I also suggest a powered anode rod, good for 20+ years to keep a tank tip top vs having to replace consumable anode rods, but that is another topic). A three cartridge system will cost you a few hundred dollars for setup, replacing the cartridges roughly every year after ~100k gallons of water has passed through them (~$100-200/year, depending on cartridge filter selection). You can mix and match cartridges for your specific water contaminant filtering needs (sediment, iron, heavy metals, VOCs, pesticides, etc). I would agree with optimizing for use case, but RO systems can be costly and high maintenance depending on the demand put on them. They are ideal for low demand, low flow applications like a kitchen faucet or refrigerator water supply for water and ice. Design accordingly.
- quasse 3y ago
  Do you measure concerning levels of glyphosate in the pre-filtration water? I've always been curious about this for the sake of my friends who live in rural areas near pesticide dependent farmers.
  - toomuchtodo 3y ago
    I send both a sample of raw water right off the well pump before going through any filtration as well as a sample of the filtered water that has gone through a 50 micron spin down filter, an iron and hydrogen sulfide filter, and then a three stage cartridge filter system (containing a 1 micron sediment filter, heavy metals filter, and active carbon filter), the output of which gets sent off as water supply to fixtures, appliances, etc. I have not noted concerning levels of glyphosate, but impurities can fluctuate and water tests are a snapshot in time of water quality.
    - DANmode 3y ago
      > concerning levels of glyphosate Go on.
hammock 3y ago
>glyphosate’s half-life in surface waters ranges from 2 to 91 days According to new research from Duke University, while it was always thought that glyphosate would break down very quickly in the environment, it seems to stick around a lot longer than we expected when it complexes in hard water. This new research found that when glyphosate encounters certain trace metal ions that make water hard—like magnesium and calcium—glyphosate-metal ion complexes can form. Those complexes can persist up to 7 years in water and 22 years in soil. Source: https://phys.org/news/2023-10-roundup-herbicide-ingredient-epidemic-chronic.html https://phys.org/news/2023-10-roundup-herbicide-ingredient-e...

toomuchtodo 3y ago

An actived carbon filter will remove ~99.9% of Glyphosate from water, if for human consumption. (source water from a ~100ft deep water table next to a large ag plot at a property, have both pre and post filter water tested to validate filtration effectiveness)

cj 3y ago
Any recommendations for where to get water tested for uncommon contaminants?
- deleted 3y ago
  [deleted]
- toomuchtodo 3y ago
  Your local university extension should be able to provide this service at a reasonable cost ($100-$500, depending on what is being tested for). There are commercial water testing firms, but I do not have experience with any that I could recommend. https://www.nifa.usda.gov/about-nifa/how-we-work/extension https://www.nifa.usda.gov/about-nifa/how-we-work/extension https://www.isws.illinois.edu/health-environmental-applications/home-water-testing https://www.isws.illinois.edu/health-environmental-applicati...
  - giantg2 3y ago
    Instead of testing for every one-off thing that comes up, maybe just go with a small reverse osmosis system for a similar price range.
    - toomuchtodo 3y ago
      A quality iron/hydrogen sulfide water filter sets you back about $2k, and will last ~10 years or ~500k gallons. If you do not have this in your water, you can safely skip. High iron can lead to iron reducing bacteria scumming up fixtures and, more importantly, rapidly dissolving a hot water heater tank. If you smell sulfur in your hot water when you shower on a well, that bacteria is eating up your tank's anode rod quicker than normally would (I also suggest a powered anode rod, good for 20+ years to keep a tank tip top vs having to replace consumable anode rods, but that is another topic). A three cartridge system will cost you a few hundred dollars for setup, replacing the cartridges roughly every year after ~100k gallons of water has passed through them (~$100-200/year, depending on cartridge filter selection). You can mix and match cartridges for your specific water contaminant filtering needs (sediment, iron, heavy metals, VOCs, pesticides, etc). I would agree with optimizing for use case, but RO systems can be costly and high maintenance depending on the demand put on them. They are ideal for low demand, low flow applications like a kitchen faucet or refrigerator water supply for water and ice. Design accordingly.
quasse 3y ago
Do you measure concerning levels of glyphosate in the pre-filtration water? I've always been curious about this for the sake of my friends who live in rural areas near pesticide dependent farmers.
- toomuchtodo 3y ago
  I send both a sample of raw water right off the well pump before going through any filtration as well as a sample of the filtered water that has gone through a 50 micron spin down filter, an iron and hydrogen sulfide filter, and then a three stage cartridge filter system (containing a 1 micron sediment filter, heavy metals filter, and active carbon filter), the output of which gets sent off as water supply to fixtures, appliances, etc. I have not noted concerning levels of glyphosate, but impurities can fluctuate and water tests are a snapshot in time of water quality.
  - DANmode 3y ago
    > concerning levels of glyphosate Go on.

hammock 3y ago

>glyphosate’s half-life in surface waters ranges from 2 to 91 days According to new research from Duke University, while it was always thought that glyphosate would break down very quickly in the environment, it seems to stick around a lot longer than we expected when it complexes in hard water. This new research found that when glyphosate encounters certain trace metal ions that make water hard—like magnesium and calcium—glyphosate-metal ion complexes can form. Those complexes can persist up to 7 years in water and 22 years in soil. Source: https://phys.org/news/2023-10-roundup-herbicide-ingredient-epidemic-chronic.html https://phys.org/news/2023-10-roundup-herbicide-ingredient-e...