PFAS in Linay's tap water: 431 ng/L, 862x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
862× 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.
Sample taken in Blagny, on the same distribution network as Linay (S20 VALLEE DE LA CHIERS). The health authority samples one tap per network; a network carries the same treated water everywhere.
More about this result
The US also limits PFOA and PFOS to 4 ng/L each, per substance.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 100% of the cities we track
checked on 20 May 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-octanoïque (PFOA) | 0.28 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.126 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.093 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.052 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.03 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.024 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.016 µg/L |
| Acide perfluoro-decanoïque (PFDA) | 0.001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
Fails a current legal limit. Here are some filter options.
- EU legal limit
- 623 ng/L sum of 20 PFAS, above the 100 ng/L limit
- Last PFAS test
- 20 May 2026
- Water supplier
- SIAEP DE LA VALLÉE DE LA CHIERS
In Linay, the 4 most closely watched PFAS (PFAS-4) add up to 431 ng/L (0.431 µg/L) at the latest PFAS check on 20 May 2026. That's 862 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 623 ng/L (0.623 µg/L), above the EU legal limit (100 ng/L). Sampled in Blagny, on the same network. 11 checks since 23 April 2025: sum of 20 PFAS from 248 ng/L to 623 ng/L. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Linay
11 PFAS checks since 23 April 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Linay.
“Calculated”: PFAS-4 worked out from the four substances in the same sample. The chart, averages and trends use lab-published sums only.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| 431 ng/L · calculated | 623 ng/L | Blagny | |
| 304 ng/L · calculated | 470 ng/L | Blagny | |
| 352 ng/L · calculated | 526 ng/L | Linay | |
| 389 ng/L · calculated | 598 ng/L | Blagny | |
| 411 ng/L – < 412 ng/L · calculated | 574 ng/L | Blagny | |
| 322 ng/L · calculated | 476 ng/L | Blagny | |
| 349 ng/L · calculated | 537 ng/L | Blagny | |
| 220 ng/L – < 221 ng/L · calculated | 332 ng/L | Blagny | |
| 276 ng/L – < 277 ng/L · calculated | 420 ng/L | Blagny | |
| 235 ng/L – < 236 ng/L · calculated | 350 ng/L | Blagny | |
| 169 ng/L – < 170 ng/L · calculated | 248 ng/L | Blagny |
Calculated values: “<” is an upper bound from published thresholds, “≥” a lower bound, “–” means no published sum or complete measurement. How to read a PFAS result
What the latest check found
At the latest check, the water was within every limit tested.
See all 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 3.8 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.5 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.011 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <0,5 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,5 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 µg/L | ≤ 50 µg/L | within the limit |
| Escherichia coli | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.5 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 27.6 °f | no limit | for reference |
| Electrical conductivity | 525 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 4 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 13.7 mg/L | ≤ 250 mg/L | within the limit |
| Iron | <5 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Linay safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés. Depuis le 10/07/2025, la consommation de l'eau est interdite par arrêté préfectoral à des fins de boisson en raison d e la somme des 20 PFAS supérieure à la limite de qualité fixée à 0,1 µg/l. Un plan d'actions pour rétablir la qualité de l'eau a été demandé à la PRPDE.”
How high are PFAS levels in Linay's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 623 ng/L. The EU limit is 100 ng/L, so this water is at 623 % of the limit. (above the EU limit)
Does the water in Linay also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 431 ng/L. That is 107.8 times Sweden's legal limit of 4 ng/L, in force since 2026. Germany will set a similar one in 2028. The sum of 20 PFAS is 623 ng/L, above the EU legal limit of 100 ng/L.
Are PFAS levels rising in Linay's tap water?
Calculated PFAS-4 values are listed in the table. The chart uses laboratory-published sum-of-20 results; there are too few laboratory-published PFAS-4 sums for the existing trend calculation.
How hard is the water in Linay?
The water hardness in Linay is 27.6 °f (medium). This mainly matters for household appliances and detergent dosing, not for health.
Where does this data come from?
All values come from official publications: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM). Retrieved on 12 September 2026.
Same water network
Same distribution network as Linay, so in principle the same water.
Nearby communes
The closest to Linay on this site.
Data source
- Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM)
- https://hubeau.eaufrance.fr/api/v1/qualite_eau_potable/resultats_dis?code_commune=08255
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- S20 VALLEE DE LA CHIERS
Water report for Linay
Get new PFAS results for Linay, with a short explanation. At most one update a week, only when there's something new.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.