PFAS in Valognes's tap water: under 4 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
No PFAS detected
The lab sees nothing below 4 ng/L, 8 times our benchmark of 0.5 ng/L. Water above our benchmark would pass this check unnoticed.
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.
More about this result
The US also limits PFOA and PFOS to 4 ng/L each, per substance.
The lab detects each of the four substances from 1 ng/L upward. None reached that limit, so their total is below 4 ng/L rather than zero.
checked on 19 May 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0010 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,0010 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0010 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,0010 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,0020 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0010 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,0010 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,0010 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
None found. The lab sees nothing below 4 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Valognes
Get new PFAS results for Valognes, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- none detected sum of 20 PFAS below the detection limit, limit 100 ng/L
- Last PFAS test
- 19 May 2026
- Water supplier
- CA DU COTENTIN - COEUR DU COTENTIN REGIE
In Valognes, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 19 May 2026. The total is below 4 ng/L, the sum of the detection limits and 8 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <SEUIL µg/L, below the EU legal limit (100 ng/L). 9 checks since 25 February 2025: sum of 20 PFAS up to 2.8 ng/L, sometimes below the detection limit. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Valognes
9 PFAS checks since 25 February 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Valognes. Samples come from 3 distribution networks. The trend refers to the network “CROIX DES FAUX”.
“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 | Network |
|---|---|---|---|---|
| < 4 ng/L · calculated | < detection limit | Valognes | CASTELET | |
| 1.4 ng/L – < 4.4 ng/L · calculated | 1.4 ng/L | Valognes | CROIX DES FAUX | |
| 2.8 ng/L – < 5.8 ng/L · calculated | 2.8 ng/L | Valognes | ACHAT D'EAU VAUGOUBERT, ACHAT D'EAU VAUGOUBERT | |
| < 4 ng/L · calculated | < detection limit | Lieusaint | ACHAT D'EAU VAUGOUBERT, ACHAT D'EAU VAUGOUBERT | |
| < 4 ng/L · calculated | < detection limit | Valognes | CROIX DES FAUX | |
| < 4 ng/L · calculated | < detection limit | Valognes | CASTELET | |
| < 4 ng/L · calculated | < detection limit | Valognes | CROIX DES FAUX | |
| < 6 ng/L · calculated | < detection limit | Valognes | CROIX DES FAUX | |
| < 6 ng/L · calculated | < detection limit | Valognes | CASTELET |
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 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 20.7 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 3.9 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.035 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 9.6 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 1.2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,025 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <1,0 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 1.4 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.075 mg/L | ≤ 1.5 mg/L | within the limit |
| Escherichia coli | ILLISIBL n/(100mL) | ≤ 0 mL) | no verdict |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | ILLISIBL n/(100mL) | ≤ 0 mL) | no verdict |
| pH | 7.9 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 21.9 °f | no limit | for reference |
| Electrical conductivity | 351 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 23 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 14 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 19.4 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 16.7 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Valognes safe to drink?
Yes. At the check on 20 July 2026, the tap water in Valognes was within every limit tested. “L'eau s'est révélée conforme aux limites et références de qualité pour l'ensemble des paramètres phycico-chimiques mesurés. Sur le plan microbiologique, certains paramètres (E.Coli et coliformes totaux) n'ont pu être lus en raison d'une flore interférente importante. Un nouveau contrôle a été programmé afin de vérifier la qualité de l'eau desservie sur ce secteur de distribution.”
How high are PFAS levels in Valognes's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at –. The EU limit is 100 ng/L, so this water is at – of the limit. (below the EU limit)
Does the water in Valognes also meet the strictest limits in Europe?
As far as this check can tell, yes. None of the four compounds was quantified, so their total is below 4 ng/L, the sum of the laboratory's detection limits, and under Sweden's legal limit of 4 ng/L in force since 2026.
Are PFAS levels rising in Valognes'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 Valognes?
The water hardness in Valognes is 21.9 °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 21 September 2026.
Nearby communes
The closest to Valognes 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=50615
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- CASTELET, CROIX DES FAUX, ACHAT D'EAU VAUGOUBERT
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.