PFAS in Le Lonzac'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 26 February 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,05 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,025 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
Fails a current legal limit. The details are below.
Water report for Le Lonzac
Get new PFAS results for Le Lonzac, 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
- 26 February 2026
- Water supplier
- SIAEP DE PUY LA FORET
In Le Lonzac, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 26 February 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). 3 checks since 28 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 Le Lonzac
3 PFAS checks since 28 April 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Le Lonzac. Samples come from 2 distribution networks. The trend refers to the network “LE LONZAC BOURG”.
“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 | Le Lonzac | LE LONZAC BOURG | |
| < 4 ng/L · calculated | < detection limit | Madranges | COUNIL | |
| < 4 ng/L · calculated | < detection limit | Le Lonzac | LE LONZAC 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 over at least one limit.
Values to watch
These results are close to their legal limit, or over it.
Outside a reference value: pH 5.4 unité pH on 8 July 2026 (reference 6.5–9 unité pH), Electrical conductivity 29.7 µS/cm on 8 July 2026 (reference 200–1,100 µS/cm). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Arsenic | 7.2 µg/L | ≤ 10 µg/L | within the limit |
| pH | 5.4 unité pH | 6.5–9 unité pH | below the reference value |
| Electrical conductivity | 29.7 µS/cm | 200–1,100 µS/cm | below the reference value |
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 3.2 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.9 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0041 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <0,5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 7.2 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 | 0.13 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 | 5.4 unité pH | 6.5–9 unité pH | below the reference value |
| Water hardness | <0,5 °f | no limit | for reference |
| Electrical conductivity | 29.7 µS/cm | 200–1,100 µS/cm | below the reference value |
| Chloride | 3.9 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | <1 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 2.9 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 22 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.49 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Le Lonzac safe to drink?
At the latest check, the water was over at least one limit. “Limite de qualité des eaux fixées par le Code de la Santé Publique (Ar t. R 1321-1 à R 1321-68) non satisfaite pour le paramètre chlorure de vinyle monomère. Cette non conformité fait l'objet d'une surveillance renforcée par l'ARS Nouvelle Aquitaine, aussi, des recontrôles seront programmés. La collectivité est incitée à identifier les points à risq ue sur son réseau pour envisager les renouvellements de canalisations nécessaires. Références de qualité des eaux fixées par le Code de la Santé Publique (Art. R 1321-1 à R 1321-68) non satisfaites pour les paramètres pH et conductivité. La faible valeur du pH mesuré confirme la très faible m inéralisation de l'eau distribuée et donc son agressivité vis à vis de s métaux. La mise en place d'un traitement correctif bien dimensionné est nécessaire.”
How high are PFAS levels in Le Lonzac'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 Le Lonzac 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 Le Lonzac'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 Le Lonzac?
The water hardness in Le Lonzac 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 Le Lonzac 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=19118
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- LE LONZAC BOURG, COUNIL
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.