Persistance of glyphosate and AMPA in soil and water

J Bruning made this Official Information request to Auckland Council

Currently waiting for a response from Auckland Council, they must respond promptly and normally no later than (details and exceptions).

From: J Bruning

Dear Auckland Council,

Request to Auckland City Council, for information or advice shared between parks, roadside and vegetation management, senior management and elected members, including but not limited to the Healthy Waters department from June 2017-June 2020.

This includes information or advice coming from the Environmental Protection Authority to staff or elected members in ACC.

Please you supply emails, reports, memos or submissions discussing:
a). The soil half-life (the time taken for half of the herbicide to degrade), of glyphosate and its metabolite AMPA which is estimated by European Food Safety Authority to be Low to very high (DT50 = 2.8 – 500.3 d)
b). Laboratory results of testing in public parks, roadsides and drains of soil for glyphosate or AMPA to establish half-life under New Zealand conditions in public areas. Laboratory tests would include screening results for companion herbicides commonly applied with glyphosate to manage weed resistance.
c). Greater health risk to pregnant mothers, babies and children from low level exposures.
d). The length of time that signage is left out to inform the public and the discrepancy between the soil half-life and the time signage is left out. Or instances where there is no signage and the glyphosate formulation is sprayed.
e). The half-life of glyphosate in water which varies from 4 – 180 days, and the potential for the metabolite AMPA to accumulate in estuary sediment.
f). Cost-benefit analyses or economic or financial reports to understand cost/risk benefit for Auckland resident health loss and potential financial and budgetary gains from glyphosate use.

Supporting notes to the request:
Torretta et al 2018. Critical Review of the Effects of Glyphosate Exposure to the Environment and Humans through the Food Supply Chain
EFSA. (2015). Conclusion on the peer review of the pesticide risk assessment of the active substance glyphosate. EFSA Journal 2015;13(11):4302.

Yours faithfully,

J Bruning

Link to this

Auckland Council

Attachment LGOIMA and Privacy Information Sheet 2017.pdf
265K Download View as HTML

Dear Jodie,


Thank you for your request for information about Glyphosate and AMPA in
soil and water.


I have attached an information sheet on our processes and requirements
under the Local Government Official Information and Meetings Act 1987.


We will respond to your request within 20 working days of receipt of your


If you have further questions please feel free to contact Fernanda Maciel
([email address])on093010101, quoting reference


Kind regards

The Privacy and LGOIMA team

Auckland Council

[1]Go to to explore Auckland’s green spaces.

CAUTION: This email message and any attachments contain information that
may be confidential and may be LEGALLY PRIVILEGED. If you are not the
intended recipient, any use, disclosure or copying of this message or
attachments is strictly prohibited. If you have received this email
message in error please notify us immediately and erase all copies of the
message and attachments. We do not accept responsibility for any viruses
or similar carried with our email, or any effects our email may have on
the recipient computer system or network. Any views expressed in this
email may be those of the individual sender and may not necessarily
reflect the views of Council.


Visible links
1. https://ourauckland.aucklandcouncil.govt...

Link to this

Things to do with this request

Auckland Council only: