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|Get the PH out of our compost!|
Thank you for signing on to help with our campaign to Get the PH Out of Our Compost!
You can read the links below to learn more about the damage persistent herbicides like Clopyralid, Picloram and Aminopyralid have done not only to crops and gardens, but to the very compost industry we represent.
We need your help now ---in June/July the US EPA’s focus is on CLOPYRALID!!
AUGUST 5 2020 is the DEADLINE for comments to US EPA on this particular herbicide (the others will come later!)
See below for more technical talking points as well!
Given the fact that there are more than 100 million tons of compost used throughout the US every year, the bulk of compost produced and sold is either uncontaminated or is below the Observed Adverse Effect level. However, we can only know about incidents when
We usually only get reports sporadically, but if there is a sizable contamination incident we may get dozens, as we have recently from the Portland, OR area and the Research Triangle (NC) region.
If someone reports directly to EPA, there is an ongoing tracking of incidents.
Damage to plants can show up in various stages of growth based on the concentration of herbicide and the susceptible plant species.
We have been working for years to limit to non-harvested crops the approved application and labeling of these pesticides. PH residual may take several years to fully break down in the environment—and this also holds true for the composting process.
Crops are allowed to have residuals that vary from 500 to 500,000 ppb, depending on the crop, yet extremely small amounts (3-20 parts per billion, depending on which PH and crop) of the PH residuals in compost can cause damage to susceptible plants where contaminated compost is used.
Compost manufacturers have almost no way of knowing whether any incoming feedstocks such as hay, manure from animals that have been fed PH-contaminated hay or turfgrass clippings contain PH residuals. Testing is both extremely difficult and very expensive. This is why we are lobbying the EPA to limit application to non-harvested crops.
Currently the EPA requires testing on aquatic species, mammals, and soil half-life. There is no requirement to test residual of PH after composting, and no limit on how long an herbicide is allowed to last in the environment. Also, most labs in
the U.S. do not have the capability to test at the low detection rate of parts per billion.
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