Hello.

Cannot remember the name of something that greatly affects rivers life from runoffs, if it was some insecticide or a fertilizer applied to soil in farms and its bad effects do not fade or decay with time. Was subject of many discussions ~10 years ago.

If anyone can tell some names I may remember its. Something like permitine perhaps ? Thanks.

6 minutes ago, Externet said:

Hello.

Cannot remember the name of something that greatly affects rivers life from runoffs, if it was some insecticide or a fertilizer applied to soil in farms and its bad effects do not fade or decay with time. Was subject of many discussions ~10 years ago.

If anyone can tell some names I may remember its. Something like permitine perhaps ? Thanks.

Nitrates from fertilisers or manure are one issue in rivers, but these are not long-lasting. DDT was a persistent insecticide, but I don't recall it being a particular issue in rivers.

By definition no fertilizer can be persistent. Their function is to be metabolized by crops (and other organisms) so they would eventually be used up. A big issue is overfertilization, of course, leading to algal blooms which has immensely detrimental to many river and lake systems.

DDT and other organochlorines are persistent, but typically the big issue is that the are bioaccumulative (i.e. organisms cannot effectively get rid of them and they accumulate over time). This can lead to issues but we are typically looking at longer-term impacts (compared to fertilizers).

1 hour ago, Externet said:

If anyone can tell some names I may remember its. Something like permitine perhaps ? Thanks.

Permethrin, mentioned by you, but misspelled. Google AI (web search summary):

"Permethrin, a pesticide, can contaminate rivers and persist for extended periods, particularly in sediment. While it breaks down in water due to microbial action and sunlight, it tends to bind strongly to sediment, potentially remaining there for over a year. This binding can lead to long-term contamination of aquatic environments"

https://en.wikipedia.org/wiki/Permethrin

Solubility in water is quite poor.

https://scienceforums.net/search/?&q=permethrin

Yeah, the modern forum search is useless. We have to use Google.

https://scienceforums.net/topic/91661-permethrin-and-gc-test/

https://scienceforums.net/topic/54962-reading-slides/

Perfluorooctanesulfonic acid (PFOS)?

Edited June 29Jun 29 by KJW

13 hours ago, Externet said:

Hello.

Cannot remember the name of something that greatly affects rivers life from runoffs, if it was some insecticide or a fertilizer applied to soil in farms and its bad effects do not fade or decay with time. Was subject of many discussions ~10 years ago.

If anyone can tell some names I may remember its. Something like permitine perhaps ? Thanks.

Just to add the other posts hopefully you will find this link useful. Part of the ZDHC process.

https://mrsl-30.roadmaptozero.com/

This is an initiative by brands and industry to reduce and eliminate dangerous chemicals from production.

Permethrin is mentioned as restricted use in section 1B

Chlorophenols are mentioned in section 1E, used in pesticides.

18 minutes ago, KJW said:

Perfluorooctanesulfonic acid (PFOS)?

PFAS Chemistry is ubiquitous (was) but is now being heavily restricted. Part of the "forever chemicals" group.

These are not normally associated with pesticides (don't hold me to that)

Uses are in textiles and surface chemistry like Teflon, nonstick, water repellent chemistry, stain release and fire fighting materials.

+1 as a very important group that is now going through a series of restrictions.

The UK Environmental Red List comprises:

Aldrin, atrazine, azinphos-methyl, all cadmium compounds, DDT and metabolites, 1-2 dichloroethane, dichlorvos, dieldrin, endosulfan, endrin, fenitrothion, hexachlorobenzene, hexachlorobutadiene, gamma-hexachlorobutadiene, Malathion, all mercury compounds, polychlorinated biphenyls, pentachlorophenol, simazine, trichlorobenzene, trifluralin, tributyltin compounds, triphenyltin compounds

There was a time when the water authorities tested for all these on at least a weekly basis. That all went out of the window after privatisation of course.

54 minutes ago, sethoflagos said:

The UK Environmental Red List comprises:

Aldrin, atrazine, azinphos-methyl, all cadmium compounds, DDT and metabolites, 1-2 dichloroethane, dichlorvos, dieldrin, endosulfan, endrin, fenitrothion, hexachlorobenzene, hexachlorobutadiene, gamma-hexachlorobutadiene, Malathion, all mercury compounds, polychlorinated biphenyls, pentachlorophenol, simazine, trichlorobenzene, trifluralin, tributyltin compounds, triphenyltin compounds

There was a time when the water authorities tested for all these on at least a weekly basis. That all went out of the window after privatisation of course.

I thought this would come under the UKHSA but they seem be all on the micro side.

The DWI do the sort of testing/collate the sort of testing we are talking about.

The link below has the reports.

Scroll down to "Drinking water 2023-Summary of the chief inspectors report for drinking water in England."

Page 14 has a pie chart of the things tested for.

Heavy metals, trihalomethanes, propy zamide (pesticide -i don't know this one) Radon and harmful pathogens.

https://www.dwi.gov.uk/what-we-do/annual-report/drinking-water-2023/

From the site.

"The Drinking Water Inspectorate (DWI) was formed in 1990 to provide independent reassurance that public water supplies in England and Wales are safe and drinking water quality is acceptable to consumers. We are a small organisation of 55 staff."