PFAS

Quality:

Per- and polyfluoroalkyl substances - class of compounds. Article “PFAS” in Portuguese Wikipedia has 90 points for quality (as of July 1, 2026). The article contains 235 references and 45 sections. The article also contains templates indicating quality issues, therefore its score was reduced by 4.74 points.

This article has the best quality in English Wikipedia. Also, this article is the most popular in that (Portuguese) language version.

Since the creation of article “PFAS”, its content was written by 12 registered users of Portuguese Wikipedia and edited by 856 registered Wikipedia users in all languages.

The article is cited 55 times in Portuguese Wikipedia and cited 1299 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Portuguese): #778 in April 2026
• Global: #1291 in August 2022

The highest popularity rank from 2008:

• Local (Portuguese): #74418 in May 2026
• Global: #8634 in May 2025

There are 25 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	English (en) PFAS		95.3926
2	Korean (ko) 과불화화합물		91.3216
3	Portuguese (pt) PFAS		89.9792
4	German (de) Per- und polyfluorierte Alkylverbindungen		89.3333
5	French (fr) PFAS		85.7997
6	Dutch (nl) Poly- en perfluoralkylstoffen		76.8568
7	Chinese (zh) 全氟和多氟烷基物質		61.5055
8	Japanese (ja) ペルフルオロアルキル化合物及びポリフルオロアルキル化合物		54.8791
9	Esperanto (eo) Perfluoralkilaj kaj polifluoralkilaj substancoj		52.7425
10	Finnish (fi) Perfluoratut alkyyliyhdisteet		51.9521

The following table shows the most popular language versions of the article.

#	Language	Popularity award	Relative popularity
1	English (en) PFAS		2 283 272
2	German (de) Per- und polyfluorierte Alkylverbindungen		1 277 714
3	French (fr) PFAS		484 899
4	Dutch (nl) Poly- en perfluoralkylstoffen		243 260
5	Italian (it) PFAS		228 641
6	Japanese (ja) ペルフルオロアルキル化合物及びポリフルオロアルキル化合物		198 826
7	Korean (ko) 과불화화합물		77 174
8	Russian (ru) ПФАС		64 899
9	Spanish (es) Sustancias perfluoroalquiladas		63 845
10	Swedish (sv) Per- och polyfluorerade alkylsubstanser		52 062

The following table shows the language versions of the article with the highest popularity in the last month.

#	Language	Popularity award	Relative popularity
1	English (en) PFAS		20 824
2	German (de) Per- und polyfluorierte Alkylverbindungen		8 833
3	French (fr) PFAS		6 718
4	Italian (it) PFAS		2 341
5	Japanese (ja) ペルフルオロアルキル化合物及びポリフルオロアルキル化合物		1 428
6	Dutch (nl) Poly- en perfluoralkylstoffen		1 320
7	Chinese (zh) 全氟和多氟烷基物質		1 001
8	Russian (ru) ПФАС		874
9	Spanish (es) Sustancias perfluoroalquiladas		753
10	Polish (pl) Związki perfluoroalkilowe		720

The following table shows the language versions of the article with the highest Authors’ Interest.

#	Language	AI award	Relative AI
1	English (en) PFAS		300
2	German (de) Per- und polyfluorierte Alkylverbindungen		216
3	French (fr) PFAS		118
4	Dutch (nl) Poly- en perfluoralkylstoffen		49
5	Japanese (ja) ペルフルオロアルキル化合物及びポリフルオロアルキル化合物		26
6	Italian (it) PFAS		24
7	Spanish (es) Sustancias perfluoroalquiladas		15
8	Polish (pl) Związki perfluoroalkilowe		14
9	Finnish (fi) Perfluoratut alkyyliyhdisteet		13
10	Danish (da) Per- og polyfluoralkylforbindelser		12

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

#	Language	AI award	Relative AI
1	English (en) PFAS		10
2	Italian (it) PFAS		3
3	Korean (ko) 과불화화합물		2
4	Catalan (ca) Substàncies per- i polifluoroalquils		1
5	German (de) Per- und polyfluorierte Alkylverbindungen		1
6	Basque (eu) Konposatu per eta polifluoroalkilatuak		1
7	Finnish (fi) Perfluoratut alkyyliyhdisteet		1
8	Dutch (nl) Poly- en perfluoralkylstoffen		1
9	Czech (cs) PFAS		0
10	Danish (da) Per- og polyfluoralkylforbindelser		0

The following table shows the language versions of the article with the highest number of citations.

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In Portuguese Wikipedia the most popular articles on that day were: Erling Haaland, República Democrática do Congo, Romelu Lukaku, Copa do Mundo FIFA de 2026, Kylian Mbappé, Senegal, Copa do Mundo FIFA, Lista de artilheiros da Copa do Mundo FIFA, Harry Kane, Carlo Ancelotti.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information