PFAS in the tap water of Saint-Louis (Haut-Rhin): 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 13 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoroheptanoïque (PFHPA) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,005 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <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-Louis
Get new PFAS results for Saint-Louis, 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
- 13 July 2026
- Water supplier
- VEOLIA EAU
In Saint-Louis, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 13 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). 61 checks since 22 January 2024: sum of 20 PFAS up to 385.3 ng/L, sometimes 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 Saint-Louis
61 PFAS checks since 22 January 2024, from the published measurements. Samples from 7 communes on the same network: it's the same water, so each one applies to Saint-Louis. Samples come from 2 distribution networks. The trend refers to the network “DISTRIBUTION SLA SECTEUR SAINT LOUIS”.
“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 |
|---|---|---|---|---|
| < 8 ng/L · calculated | < 5 ng/L | Huningue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 45 ng/L | Hégenheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 44 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 51 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 41 ng/L | Hésingue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 8 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Hégenheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Buschwiller | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Huningue | DISTRIBUTION SLA SECTEUR SAINT LOUIS |
Show the 49 earlier checks (back to 22 January 2024)
| < 8 ng/L · calculated | < 5 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Village-Neuf | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Hésingue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Blotzheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 26 ng/L | Saint-Louis | 068006583 | |
| < 8 ng/L · calculated | < 5 ng/L | Hégenheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 2 ng/L – < 8 ng/L · calculated | 31 ng/L | Buschwiller | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Hégenheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Hésingue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Huningue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 27 ng/L | Saint-Louis | 068006583 | |
| < 8 ng/L · calculated | < 5 ng/L | Blotzheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 3 ng/L – < 9 ng/L · calculated | 39 ng/L | Buschwiller | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Village-Neuf | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 6 ng/L | Saint-Louis | 068006583 | |
| < 8 ng/L · calculated | < 5 ng/L | Blotzheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Buschwiller | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Village-Neuf | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Huningue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | < 5 ng/L | Hésingue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 14 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| < 8 ng/L · calculated | 14 ng/L | Hégenheim | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 13 ng/L – < 15 ng/L · calculated | 150 ng/L | Hésingue | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 29 ng/L – < 31 ng/L · calculated | 340 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 15 ng/L – < 17 ng/L · calculated | 230 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 24 ng/L – < 26 ng/L · calculated | 240 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 26 ng/L – < 28 ng/L · calculated | 320 ng/L | Buschwiller | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 29 ng/L – < 31 ng/L · calculated | 300 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 82 ng/L – < 84 ng/L · calculated | 350 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 51 ng/L – < 53 ng/L · calculated | 310 ng/L | Buschwiller | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 29 ng/L – < 31 ng/L · calculated | 300 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 16 ng/L – < 18 ng/L · calculated | 160 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 15 ng/L – < 17 ng/L · calculated | 270 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 26 ng/L – < 28 ng/L · calculated | 310 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 28 ng/L – < 30 ng/L · calculated | 320 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 29 ng/L – < 31 ng/L · calculated | 360 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 28.4 ng/L – < 29.4 ng/L · calculated | 340.7 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 31.3 ng/L – < 32.3 ng/L · calculated | 280.8 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 42.2 ng/L · calculated | 269.3 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 51.3 ng/L · calculated | 385.3 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 45.1 ng/L · calculated | 355.3 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 28.4 ng/L – < 33.4 ng/L · calculated | 170.1 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 21.4 ng/L – < 22.4 ng/L · calculated | 118 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 26.6 ng/L – < 27.6 ng/L · calculated | 213.1 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 24.8 ng/L – < 25.8 ng/L · calculated | 185.2 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 24.8 ng/L – < 25.8 ng/L · calculated | 211.8 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 32.9 ng/L – < 33.9 ng/L · calculated | 254.8 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS | |
| 18.7 ng/L – < 19.7 ng/L · calculated | 134.8 ng/L | Saint-Louis | DISTRIBUTION SLA SECTEUR SAINT LOUIS |
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.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 31 mg/L | ≤ 50 mg/L | within the limit |
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 31 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.4 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0078 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <0,2 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 0.81 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,01 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 1.17 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 0.94 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.09 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 | 6.99 unité pH | 6.5–9.5 pH | within the limit |
| Water hardness | 36.7 °f | no limit | for reference |
| Electrical conductivity | 740 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 32 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 21 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 13 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 2 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Louis safe to drink?
Yes. At the check on 13 July 2026, the tap water in Saint-Louis 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-Louis'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-Louis 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-Louis'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 Saint-Louis?
The water hardness in Saint-Louis is 36.7 °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 21 September 2026.
Same water network
Same distribution network as Saint-Louis, so in principle the same water.
Nearby communes
The closest to Saint-Louis 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=68297
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- DISTRIBUTION SLA SECTEUR SAINT LOUIS
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.