PFAS in Sérézin-du-Rhône's tap water: under 4 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
None of the 4 most harmful 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.
Sample taken in Ternay, on the same distribution network as Sérézin-du-Rhône (COMMUNAY ET REGION). The health authority samples one tap per network; a network carries the same treated water everywhere.
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 10 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorobutanoïque (PFBA) | 0.009 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.006 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.004 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
None found. The lab sees nothing below 4 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Sérézin-du-Rhône
Get new PFAS results for Sérézin-du-Rhône, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- 19 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 10 July 2026
- Water supplier
- SUEZ LYONNAISE DES EAUX 69
In Sérézin-du-Rhône, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 10 July 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: 19 ng/L (0.019 µg/L), below the EU legal limit (100 ng/L). Sampled in Ternay, on the same network. 13 checks since 17 October 2025: PFAS-4 up to 30 ng/L, sometimes below the detection limit, averaging at least 5.62 ng/L over 12 months (non-detects as 0). Falling on the main network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Sérézin-du-Rhône
43 PFAS checks since 3 February 2023, from the published measurements. Samples from 5 communes on the same network: it's the same water, so each one applies to Sérézin-du-Rhône.
“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 |
|---|---|---|---|
| < 4 ng/L | 19 ng/L | Ternay | |
| < 4 ng/L | 9 ng/L | Communay | |
| < 4 ng/L | 8 ng/L | Ternay | |
| < 4 ng/L | 6 ng/L | Ternay | |
| < 4 ng/L | 5 ng/L | Sérézin-du-Rhône | |
| < 4 ng/L | 1 ng/L | Ternay | |
| < 4 ng/L | < 29 ng/L | Simandres | |
| < 4 ng/L | 6 ng/L | Ternay | |
| 3 ng/L | 16 ng/L | Ternay | |
| 7 ng/L | 35 ng/L | Ternay | |
| 13 ng/L | 85 ng/L | Ternay | |
| 20 ng/L | 73 ng/L | Sérézin-du-Rhône |
Show the 31 earlier checks (back to 3 February 2023)
| 30 ng/L | 136 ng/L | Ternay | |
| 37 ng/L · calculated | 182 ng/L | Saint-Symphorien-d'Ozon | |
| 32 ng/L · calculated | 190 ng/L | Ternay | |
| 30 ng/L · calculated | 155 ng/L | Ternay | |
| 34 ng/L · calculated | 156 ng/L | Ternay | |
| 30 ng/L · calculated | 144 ng/L | Simandres | |
| 29 ng/L · calculated | 126 ng/L | Ternay | |
| 30 ng/L · calculated | 153 ng/L | Sérézin-du-Rhône | |
| 33 ng/L · calculated | 149 ng/L | Ternay | |
| 34 ng/L · calculated | 160 ng/L | Communay | |
| 28 ng/L · calculated | 161 ng/L | Ternay | |
| 23 ng/L · calculated | 108 ng/L | Sérézin-du-Rhône | |
| 26 ng/L · calculated | 123 ng/L | Ternay | |
| 27 ng/L · calculated | 105 ng/L | Saint-Symphorien-d'Ozon | |
| 25 ng/L · calculated | 115 ng/L | Ternay | |
| 29 ng/L · calculated | 96 ng/L | Ternay | |
| 30.6 ng/L · calculated | 85.3 ng/L | Ternay | |
| 26.7 ng/L · calculated | 100.1 ng/L | Simandres | |
| 24 ng/L · calculated | 81.6 ng/L | Ternay | |
| 55.1 ng/L · calculated | 198.7 ng/L | Sérézin-du-Rhône | |
| 35.5 ng/L · calculated | 135 ng/L | Ternay | |
| 38.2 ng/L · calculated | 123.6 ng/L | Communay | |
| 28.8 ng/L · calculated | 91.6 ng/L | Ternay | |
| 25.5 ng/L · calculated | 91.8 ng/L | Ternay | |
| 35 ng/L · calculated | 163.1 ng/L | Saint-Symphorien-d'Ozon | |
| 37.2 ng/L · calculated | 169 ng/L | Ternay | |
| 13 ng/L – < 14 ng/L · calculated | 65.9 ng/L | Ternay | |
| 33.3 ng/L · calculated | 139.2 ng/L | Simandres | |
| 25.4 ng/L – < 30.4 ng/L · calculated | 141.1 ng/L | Ternay | |
| 28.8 ng/L – < 33.8 ng/L · calculated | 137.8 ng/L | Sérézin-du-Rhône | |
| 24.7 ng/L – < 29.7 ng/L · calculated | 112.5 ng/L | Ternay |
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.
See all 14 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 12.2 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 50 µg/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 | 7.2 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 25.53 °f | no limit | for reference |
| Electrical conductivity | 603 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 24.8 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 44.6 mg/L | ≤ 250 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Sérézin-du-Rhône safe to drink?
Yes. At the check on 10 July 2026, the tap water in Sérézin-du-Rhône 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 Sérézin-du-Rhône's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 19 ng/L. The EU limit is 100 ng/L, so this water is at 19 % of the limit. (below the EU limit)
Does the water in Sérézin-du-Rhône 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 Sérézin-du-Rhône's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 30 ng/L (17 October 2025) to 3 ng/L (16 January 2026) across 5 quantified checks. These history statistics use laboratory-published sums only.
How hard is the water in Sérézin-du-Rhône?
The water hardness in Sérézin-du-Rhône is 25.5 °f (medium). 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 Sérézin-du-Rhône, so in principle the same water.
Nearby communes
The closest to Sérézin-du-Rhône 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=69294
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- COMMUNAY ET REGION
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.