I have read the report, and it is all fairly predictable. UK is out of the EU so it doesn't show up (
The United Kingdom left the European Union as of 1 February 2020 and is not included in the analysis presented in this report.). The other two states I have mentioned, Belgium and Netherlands are high in cocaine intake (along with Spain) and cocaine seizures (and all other stimulants/sex party drugs).
"Cocaine The BE loads observed in wastewater indicate that cocaine use remains highest in western and southern European cities, in particular in cities in Belgium, the Netherlands and Spain."
-from "Wastewater analysis and drugs: a European multi-city study" Link to PDF of a study (to make it more practical for all that are interested)
So my hunch about where it is used the most is generally ok.
"In 2019, EU Member States reported 98 000 seizures of cocaine amounting to 213 tonnes (177 tonnes in 2018. Belgium (65 tonnes), the Netherlands (44 tonnes) and Spain (38 tonnes) together accounted for 69 % of the total quantity seized."
-from "European drug report 2021: Trends and developments" Link to PDF of a study
Regarding where it was seized the most, again the same states. This doesn't say where it comes in without seizures though (most corrupt countries).
Still haven't found data where (cocaine) is ranked by country/purity. I will probably need some help with this.
This part reveals a lot and muddies the waters at the same time:
"Cocaine was the substance most frequently submitted for testing to drug checking services in 14 European cities between January and June 2020. The average purity of cocaine samples was 60 % (69 % during the same period in 2019), with one in every three samples containing 80 % cocaine or more."
This is an indication that purity is high in bulk and if ordered online (DNMs). People who buy coke on the street do not send it to be tested. They send it right up their nose and go buy some more. This suggests a big discrepancy between what most people actually consume and purity data averaged in this way. I may be wrong with this hypothesis, but I've got a strong feeling that this is the case. In the past 5 years, I have even come to learn a new term that was not around here before "street coke", which implies coke cut to the shit and sold at a low price. This type of cocaine is the bulk of what people snort from Friday to Sunday at weekend parties around here.
Regarding heroin (opioids) which paints a clearer picture for cocaine also:
"EU Member States reported 26 000 heroin seizures amounting to 7.9 tonnes in 2019. Large quantities were reported by Belgium (1.9 tonnes), Bulgaria (0.8 tonnes), France (1 tonne), the Netherlands (1.3 tonnes) and Slovenia (0.8 tonnes)."
Now we are closer to what is a public secret around these parts. North Adriatic sea, ports in the area where Slovenia and Croatia have borders (land and sea), are known to be entry points for cocaine as well as heroin. It is just that corrupt politicians and secret services are more inclined to let the drugs in and not to seize. Usage of submarines from ex-Yu military is well documented and even places where cocaine is unloaded are known. The only problem is that nobody here gives a fuck. Politicians, police, and secret services are probably well paid from more respected EU member countries to just let it all in. That's the reason why the Balkan mafia is growing in its power and grip in Europe.
All in all this report is very vague cause differences from country to country are enormous in the EU.
But one country where all coke/mdma/(meth)amphetamine heads meat and party stands out - Belgium, where the capital of EU is. Who would have guessed?