PFAS in Mardilly'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.
Sample taken in Saint-Evroult-Notre-Dame-du-Bois, on the same distribution network as Mardilly (GAUVILLE). 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.
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 29 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0050 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0010 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <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 Mardilly
Get new PFAS results for Mardilly, 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
- 29 July 2026
- Water supplier
- SAUR FRANCE
In Mardilly, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 29 July 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). Sampled in Saint-Evroult-Notre-Dame-du-Bois, on the same network. 8 checks since 10 February 2025, sum of 20 PFAS always 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 Mardilly
8 PFAS checks since 10 February 2025, from the published measurements. Samples from 4 communes on the same network: it's the same water, so each one applies to Mardilly. Samples come from 2 distribution networks. The trend refers to the network “GAUVILLE”.
“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 | Saint-Evroult-Notre-Dame-du-Bois | GAUVILLE | |
| < 4 ng/L · calculated | < detection limit | Mardilly | GACE MELANGE | |
| < 4 ng/L · calculated | < detection limit | La Ferté-en-Ouche | GAUVILLE | |
| < 4 ng/L · calculated | < detection limit | La Ferté-en-Ouche | GAUVILLE | |
| < 4 ng/L · calculated | < detection limit | Croisilles | GACE MELANGE | |
| < 4 ng/L · calculated | < detection limit | La Ferté-en-Ouche | GAUVILLE | |
| < 6 ng/L · calculated | < detection limit | Croisilles | GACE MELANGE | |
| < 6 ng/L · calculated | < detection limit | La Ferté-en-Ouche | GAUVILLE |
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.
Values to watch
These results are close to their legal limit, or over it.
Outside a reference value: Iron 326 µg/L on 3 July 2026 (reference ≤ 200 µg/L). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Iron | 326 µg/L | ≤ 200 µg/L | above the reference value |
See all 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 8.5 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.1 mg/L | within the limit |
| Arsenic | 0.3 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 | 0.37 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.053 mg/L | ≤ 1.5 mg/L | within the limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.4 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 33.2 °f | no limit | for reference |
| Electrical conductivity | 653 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 12 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 15 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 6.2 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 326 µg/L | ≤ 200 µg/L | above the reference value |
| Turbidity | 2 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Mardilly safe to drink?
Yes. At the check on 29 July 2026, the tap water in Mardilly was within every limit tested. Outside a reference value: Iron 326 µg/L on 3 July 2026 (reference ≤ 200 µg/L). These are indicator parameters with reference values, not legal limits. “Eau d'alimentation conforme aux limites de qualité bactériologique et physico-chimique en vigueur pour les paramètres recherchés. Eau d'alimentation conforme aux références de qualité bactériologique en vigueur pour les paramètres recherchés. Cependant, eau ne respectant pas les références de qualité physico-chimique en vigueur en raison de la teneur en fer de l'eau produite qui est supérieure à la valeur limite maximale fixée à 200 µg/L. Il convient de surveiller l'efficaci té du traitement de déferrisation pendant toute la période d'utilisation du forage de secours.”
How high are PFAS levels in Mardilly'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 Mardilly 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 Mardilly'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 Mardilly?
The water hardness in Mardilly is 33.2 °f (hard). 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 28 September 2026.
Same water network
Same distribution network as Mardilly, so in principle the same water.
Nearby communes
The closest to Mardilly 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=61252
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 September 2026
- Supply networks
- GAUVILLE, GACE MELANGE
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.