PFAS in Saint-Leu'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 20 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,005 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
None found. The lab sees nothing below 8 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Saint-Leu
Get new PFAS results for Saint-Leu, 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
- 20 July 2026
- Water supplier
- DERICHEBOURG AQUA OI
In Saint-Leu, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 20 July 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). 12 checks since 4 June 2025, PFAS-4 always below the detection limit (4 ng/L). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Saint-Leu
12 PFAS checks since 4 June 2025, values as published. Samples come from 8 distribution networks. The trend refers to the network “RESEAU ST-LEU VILLE”.
| Date | PFAS-4 | Sum of 20 PFAS | Network |
|---|---|---|---|
| < 2 ng/L | < 5 ng/L | RESEAU MADURAN PORTAIL ETANG | |
| < 2 ng/L | < 5 ng/L | RESEAU LES HAUTS DE ST-LEU | |
| < 2 ng/L | < 5 ng/L | RESEAU PITON 800 | |
| < 2 ng/L | < 5 ng/L | RESEAU LA CHALOUPE | |
| < 2 ng/L | < 5 ng/L | RESEAU ST-LEU VILLE | |
| < 4 ng/L | < 29 ng/L | RESEAU CD13 | |
| < 4 ng/L | < 29 ng/L | RESEAU LA CHALOUPE | |
| < 4 ng/L | < 29 ng/L | RESEAU PITON 800 | |
| < 4 ng/L | < 29 ng/L | RESEAU PITON 1000 | |
| < 4 ng/L | < 29 ng/L | RESEAU ST-LEU VILLE | |
| < 4 ng/L | < 29 ng/L | RESEAU LES HAUTS DE ST-LEU | |
| < detection limit | < 100 ng/L | RESEAU L'ETANG (ABA), RESEAU L'ETANG (ABA) |
“<” means not detected, the figure being the detection limit. “–” means not published. Labs have only reported the PFAS-4 sum (SANDRE code 9268) since autumn 2025. 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 | 0.5 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,05 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <0,1 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.003 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 0.3 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 0.04 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,01 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.06 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 0.2 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 | 7.9 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 7.9 °f | no limit | for reference |
| Electrical conductivity | 598 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 11 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 64 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 46 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <50 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.2 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Leu safe to drink?
Yes. At the check on 20 July 2026, the tap water in Saint-Leu was within every limit tested. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Saint-Leu'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 Saint-Leu 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.
Are PFAS levels rising in Saint-Leu's tap water?
Too few quantified checks to say (0 since 4 June 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Saint-Leu?
The water hardness in Saint-Leu is 7.9 °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 Saint-Leu 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=97413
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- RESEAU ST-LEU VILLE, RESEAU CD13, RESEAU LES HAUTS DE ST-LEU, RESEAU PITON 1000, RESEAU MADURAN, RESEAU PITON 800, RESEAU L'ETANG (ABA), RESEAU LA CHALOUPE , RESEAU MADURAN_PORTAIL (ABA), RESEAU MADURAN PORTAIL ETANG
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.