PFAS in Davignac's tap water: under 14 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 14 ng/L, 28 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 2 to 5 ng/L upward. None reached that limit, so their total is below 14 ng/L rather than zero.
checked on 10 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoroheptane sulfonique (PFHpS) | <0,005 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,005 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,005 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,005 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,005 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,005 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,005 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,005 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,025 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,005 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
None found. The lab sees nothing below 14 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Davignac
Get new PFAS results for Davignac, 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
- 10 June 2026
- Water supplier
- MAIRIE DE DAVIGNAC
In Davignac, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 10 June 2026. The total is below 14 ng/L, the sum of the detection limits and 28 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <SEUIL µg/L, below the EU legal limit (100 ng/L). 7 checks since 10 April 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 Davignac
7 PFAS checks since 10 April 2025, from the published measurements. Samples come from 6 distribution networks. The trend refers to the network “LE TOURNEL”.
“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 | Network |
|---|---|---|---|
| < 14 ng/L · calculated | < detection limit | LE TOURNEL | |
| < 4 ng/L · calculated | < detection limit | LE TOURNEL | |
| < 4 ng/L · calculated | < detection limit | BEYNE | |
| < 4 ng/L · calculated | < detection limit | DAVIGNAC LESTAT | |
| < 4 ng/L · calculated | < detection limit | ROUFFIAT | |
| < 4 ng/L · calculated | < detection limit | LES BORDES | |
| < 4 ng/L · calculated | < detection limit | DAVIGNAC BOURG |
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: Electrical conductivity 27.5 µS/cm on 23 July 2026 (reference 200–1,100 µS/cm). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Electrical conductivity | 27.5 µS/cm | 200–1,100 µS/cm | below the reference value |
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 1.2 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 1 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.035 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <0,5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <0,2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,02 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 0.05 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | <0,1 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 | 6.6 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | <0,5 °f | no limit | for reference |
| Electrical conductivity | 27.5 µS/cm | 200–1,100 µS/cm | below the reference value |
| Chloride | 2.2 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 1.5 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 1.8 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <1 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.46 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Davignac safe to drink?
Yes. At the check on 30 July 2026, the tap water in Davignac was within every limit tested. Outside a reference value: Electrical conductivity 27.5 µS/cm on 23 July 2026 (reference 200–1,100 µS/cm). These are indicator parameters with reference values, not legal limits. “Examen conforme aux limites et références de qualité fixées par le Code de la Santé Publique (Art. R 1321-1 à R 1321-68) pour les paramètres mesurés.”
How high are PFAS levels in Davignac'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 Davignac also meet the strictest limits in Europe?
The check cannot say. None of the four compounds was quantified, but the laboratory's detection limits add up to 14 ng/L, above Sweden's legal limit of 4 ng/L in force since 2026, so a value between the two would go unnoticed.
Are PFAS levels rising in Davignac'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 Davignac?
The water hardness in Davignac is 0 °f (soft). 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 Davignac 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=19071
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- ROUFFIAT, BEYNE, LES BORDES, DAVIGNAC BOURG, DAVIGNAC LESTAT, LE TOURNEL
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.