So, I'd love to hear people who have more expertise in the field join in (as I have very little).

I looked up what the WHO currently has on their website for Glyphosate and AMPA (a metabolite of Glyphosate).

The points from their current summary:

1. "minimal" worry about ground water contamination: it is not very mobile in soil, so the contamination has to be somewhat direct (the chemical is sprayed on a water source, that water can carry the chemical away, but the chemical doesn't "penetrate" the ground and contaminate the water table that way. There is a brief mention of the chemical leeching into (what I assume to be) irrigation waters, and moving that way.

2. The listed acceptable level in (drinking?) water for humans is listed at 0.9mg/liter, and they mention this is orders of magnitude higher than found in drinking water. from here

That is, I am assuming, to be superceded by this new research, and they will update their text accordingly.

Now, to the new research, which you can read here in the fulltext , after you sign up for free.

The report is very brief, but here is what they say on Glyphosate:

1. Occupational exposure to it has been linked to increased risks for non-Hodgkin Lymphoma.

Source 1

Source 2

Source 3

2. In mice models, exposure to glyphosate increased incident of rental tubule carcinoma (otherwise, a rare condition).

3. In a seperate study, an increased trend in "haemangiosarcoma" in male rats.

4. Increased pancreatic islet-cell adenoma in male rats.

5. Skin tumors were promoted when a glyphosate formulation was presented to the skin of mice.

6. Seemingly the last major point listed: glyphosate and formulations thereof produced oxidative stress in rodents and in vitro.

I think the question I have after reading this is: does this matter for consumers?

There are plenty of pesticides which would be dangerous and carcinogenic if you were exposed to them in industrial settings (where you have large quantities of undiluted substance), but many of these are also perfectly safe if properly handled, diluted, and eventually sprayed in very small quantities onto our food. Washing your veggies is another safety step which distances you from this problem (in some, not ALL cases).

That being said, the new report doesn't seem to offer new information about exposure risk or groundwater contamination risk. If there is new data on that, which suggests problematic levels could be building up, then obviously it is a problem.

However, if the silence is to be taken as "there is no new data" I don't really see a large cause for alarm.