PFAS in Farciennes's tap water: 1.1 ng/L, 2.2x our 0.5 ng/L benchmark
Last PFAS check: · Source: SPW-ARNE / SWDE
PFAS in drinking water
2.2× above our health benchmark
0.5 ng/L is our benchmark, not an official limit. Same EFSA method as Sweden, Denmark and the Netherlands, but stricter. It's a yearly average, compared here with the latest check.
The PFAS figures come from the sample of 4 September 2025 in distribution zone ZW1110 (SWDE), one of the 3 zones serving Farciennes.
More about this result
The US also limits PFOA and PFOS to 4 ng/L each, per substance.
Substances below the detection limit count as 0, so the real total may be higher.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 53% of the cities we track
checked on 4 September 2025
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| PFOA | 0.0011 µg/L |
| PFOS | <0,001 µg/L |
| PFHxS | <0,001 µg/L |
| PFHxA | <0,001 µg/L |
| PFHpA | <0,001 µg/L |
| PFBA | <0,001 µg/L |
| PFPeA | <0,001 µg/L |
| PFNA | <0,001 µg/L |
| PFDA | <0,001 µg/L |
| PFUnDA | <0,001 µg/L |
| PFDoDA | <0,001 µg/L |
| PFTrDA | <0,001 µg/L |
| PFBS | <0,001 µg/L |
| PFPeS | <0,001 µg/L |
| PFHpS | <0,001 µg/L |
| PFNS | <0,001 µg/L |
| PFDS | <0,001 µg/L |
| PFUnDS | <0,001 µg/L |
| PFDoDS | <0,001 µg/L |
| PFTrDS | <0,001 µg/L |
Above our health benchmark. Get new results by email below.
Water report for Farciennes
Get new PFAS results for Farciennes, with a short explanation. At most one update a week, only when there's something new.
- Legal limit (Belgium and EU)
- 1.1 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 4 September 2025
- Water supplier
- SWDE
In Farciennes, the 4 most closely watched PFAS (PFAS-4) add up to 1.1 ng/L (0.0011 µg/L) at the latest PFAS check on 4 September 2025. That's 2.2 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 1.1 ng/L (0.0011 µg/L), below the EU legal limit (100 ng/L). 17 checks since 19 September 2023: PFAS-4 up to 2 ng/L, sometimes below the detection limit, averaging at least 0.67 ng/L over 12 months (non-detects as 0). Source: SPW-ARNE / SWDE – Etat des lieux du monitoring PFAS dans les eaux distribuées (sept. 2023 – déc. 2025).
Details and sources
PFAS over time in Farciennes
17 PFAS checks since 19 September 2023, values as published. Samples come from 3 distribution networks. The trend refers to the network “ZW18126 (SWDE)”.
| Date | PFAS-4 | Sum of 20 PFAS | Network |
|---|---|---|---|
| 1.1 ng/L | 1.1 ng/L | ZW1110 (SWDE) | |
| < 4 ng/L | < 20 ng/L | ZW18126 (SWDE) | |
| < 4 ng/L | < 20 ng/L | ZW18126 (SWDE) | |
| 1 ng/L | 1 ng/L | ZW1114 (SWDE) | |
| 2 ng/L | 3 ng/L | ZW18126 (SWDE) | |
| < 4 ng/L | < 27 ng/L | ZW1110 (SWDE) | |
| 2 ng/L | 7 ng/L | ZW1110 (SWDE) | |
| < 4 ng/L | < 24 ng/L | ZW18126 (SWDE) | |
| < 4 ng/L | < 25 ng/L | ZW18126 (SWDE) | |
| < 4 ng/L | < 25 ng/L | ZW1114 (SWDE) | |
| < 8 ng/L | < 40 ng/L | ZW1110 (SWDE) | |
| < 8 ng/L | < 40 ng/L | ZW18126 (SWDE) |
Show the 5 earlier checks (back to 19 September 2023)
| < 4 ng/L | < 23 ng/L | ZW1110 (SWDE) | |
| < 4 ng/L | < 20 ng/L | ZW18126 (SWDE) | |
| 2 ng/L | 6 ng/L | ZW1110 (SWDE) | |
| 1 ng/L | 1 ng/L | ZW1114 (SWDE) | |
| < 4 ng/L | < 24 ng/L | ZW18126 (SWDE) |
“<” means not detected, the figure being the detection limit. “–” means not published. Labs have only reported the PFAS-4 sum (SANDRE code 9268) since autumn 2025. How to read a PFAS result
What the latest check found
The authorities have not published an overall verdict for this water.
Frequently asked questions
Is tap water in Farciennes safe to drink?
All the values shown here (4 September 2025) are within the legal limits, but the authorities have not published an overall verdict for this water.
How high are PFAS levels in Farciennes's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 1.1 ng/L. The EU limit is 100 ng/L, so this water is at 1 % of the limit. (below the EU limit)
Does the water in Farciennes also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 1.1 ng/L stays below.
Are PFAS levels rising in Farciennes's tap water?
Too few quantified checks to say (1 since 19 September 2023). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
Which PFAS limits apply in Belgium?
Belgium applies the EU limit of 100 ng/L for the sum of 20 PFAS as binding law (Flemish Drinkwaterbesluit of 2023, Walloon Code de l'eau since February 2025). For the four most harmful PFAS (PFAS-4) all three regions set a target of 4 ng/L that becomes binding in 2028. This site's 0.5 ng/L benchmark is stricter than both.
How hard is the water in Farciennes?
No hardness value is available for Farciennes in this source.
Where does this data come from?
All values come from official publications: SPW-ARNE / SWDE – Etat des lieux du monitoring PFAS dans les eaux distribuées (sept. 2023 – déc. 2025). Retrieved on 28 September 2026.
Same water network
Same distribution network as Farciennes, so in principle the same water.
Nearby cities
The closest to Farciennes on this site.
Data source
- SPW-ARNE / SWDE – Etat des lieux du monitoring PFAS dans les eaux distribuées (sept. 2023 – déc. 2025)
- https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas
- Retrieved
- 28 September 2026
- Supply networks
- ZW1110 (SWDE), ZW1114 (SWDE), ZW18126 (SWDE)
Wallonia: Service public de Wallonie (SPW-ARNE) with SWDE, PFAS monitoring of distributed water, one row per sample and distribution zone, September 2023 to December 2025. The reuse licence for this document is still to be confirmed with SPW; attributed to SPW-ARNE and SWDE meanwhile.
Limits in Belgium. Belgium applies the EU limit of 100 ng/L for the sum of 20 PFAS as binding law (Flemish Drinkwaterbesluit of 2023, Walloon Code de l'eau since February 2025). For the four most harmful PFAS (PFAS-4) all three regions set a target of 4 ng/L that becomes binding in 2028. This site's 0.5 ng/L benchmark is stricter than both.
Résultats du monitoring PFAS des eaux distribuées (SPW-ARNE, coordination SWDE), une ligne par prélèvement et zone de distribution (ZDE) ; la commune est desservie par 3 zones (ZW1110, ZW1114, ZW18126). Valeurs publiées en ng/L, converties en µg/L ; un « < » indique que tous les composés étaient sous la limite de quantification. Licence de réutilisation non vérifiée pour ce document (les données ouvertes du SPW sont normalement CC BY 4.0) ; attribution SPW-ARNE et SWDE en attendant confirmation.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.