FOI release

Historical Nitrogen Data at Teddington Weir

Case reference EIR2026/17284

Received 23 March 2026

Published 17 April 2026

Request

I was wondering if there was any more historical data available that is not currently on the website. Data available on the water quality explorer website goes back until 2000, but I have seen citations stating that there is data available for the Thames at Teddington going back further.

Response

Please find attached the pre-2000 nitrogen data for the site PTHR0107 (Thames at Teddington Weir). Data for this site goes back as far as 1972.

Please refer to the Open Government Licence which explains the permitted use of this information.

Documents

• Historical Nitrogen Data.xlsx (104.6 KB)

This is Environment Agency's response to a freedom of information (FOI) or environmental information regulations (EIR) request.