PFAS in San-Lorenzo's tap water: under 8 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 8 ng/L, 16 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 ng/L upward. None reached that limit, so their total is below 8 ng/L rather than zero.
checked on 27 May 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoroheptanoïque (PFHPA) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,005 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,005 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
Fails a current legal limit. The details are below.
Water report for San-Lorenzo
Get new PFAS results for San-Lorenzo, 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
- 27 May 2026
- Water supplier
- MAIRIE DE SAN LORENZO
In San-Lorenzo, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 27 May 2026. The total is below 8 ng/L, the sum of the detection limits and 16 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <0,005 µg/L, below the EU legal limit (100 ng/L). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in San-Lorenzo
A single PFAS check has been published for San-Lorenzo so far (27 May 2026). A history will build up with the next checks; this page is refreshed weekly.
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: Coliform bacteria 4 n/(100mL) on 21 July 2026 (reference ≤ 0 mL)), Electrical conductivity 136 µS/cm on 21 July 2026 (reference 200–1,100 µS/cm). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nickel | 11.3 µg/L | ≤ 20 µg/L | within the limit |
| Escherichia coli | 4 n/(100mL) | ≤ 0 mL) | over the limit |
| Enterococci | 36 n/(100mL) | ≤ 0 mL) | over the limit |
| Coliform bacteria | 4 n/(100mL) | ≤ 0 mL) | above the reference value |
| Electrical conductivity | 136 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 | <0,05 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <0,25 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0013 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 11.3 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 1.73 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,025 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 9.4 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <0,1 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | <0,05 mg/L | ≤ 1.5 mg/L | within the limit |
| Escherichia coli | 4 n/(100mL) | ≤ 0 mL) | over the limit |
| Enterococci | 36 n/(100mL) | ≤ 0 mL) | over the limit |
| Coliform bacteria | 4 n/(100mL) | ≤ 0 mL) | above the reference value |
| pH | 7.73 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 6.34 °f | no limit | for reference |
| Electrical conductivity | 136 µS/cm | 200–1,100 µS/cm | below the reference value |
| Chloride | 4.7 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 3 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 2.8 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 8 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.26 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in San-Lorenzo safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation non-conforme aux exigences de qualité. Présence de germes témoins de contamination fécale. La teneur en chlore libre est insuffisante. Eau faiblement minéralisée.”
How high are PFAS levels in San-Lorenzo's drinking water?
At the latest check the total of 20 PFAS ("forever chemicals") was below the laboratory's reporting limit of 5 ng/L. The EU limit is 100 ng/L, so this water is under 5 % of the limit. (below the EU limit)
Does the water in San-Lorenzo 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 8 ng/L, above Sweden's legal limit of 4 ng/L in force since 2026, so a value between the two would go unnoticed.
How hard is the water in San-Lorenzo?
The water hardness in San-Lorenzo is 6.3 °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 San-Lorenzo 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=2B304
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SAN LORENZO
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.