PFAS in Saint-Étienne-de-Saint-Geoirs'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 28 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <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 Saint-Étienne-de-Saint-Geoirs
Get new PFAS results for Saint-Étienne-de-Saint-Geoirs, 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
- 28 July 2026
- Water supplier
- CC BIÈVRE ISÈRE
In Saint-Étienne-de-Saint-Geoirs, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 28 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: <0,029 µg/L, below the EU legal limit (100 ng/L). 12 checks since 8 August 2025: PFAS-4 up to 56 ng/L, sometimes below the detection limit, averaging at least 14.82 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 Saint-Étienne-de-Saint-Geoirs
19 PFAS checks since 29 April 2025, from the published measurements. Samples come from 3 distribution networks. The trend refers to the network “LA PLAINE”.
“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 | Network |
|---|---|---|---|
| < 4 ng/L | < 29 ng/L | ST ETIENNE DE ST GEOIRS CENTRE | |
| 12 ng/L | 21 ng/L | LA PLAINE | |
| 7 ng/L | 14 ng/L | LA PLAINE | |
| < 4 ng/L | < 29 ng/L | LA PLAINE | |
| < 4 ng/L | < 29 ng/L | LA PLAINE | |
| 2 ng/L | 2 ng/L | LA PLAINE | |
| 19 ng/L | 34 ng/L | LA PLAINE | |
| 56 ng/L | 105 ng/L | LA PLAINE | |
| < 4 ng/L | < 29 ng/L | LA PLAINE | |
| < 4 ng/L | < 29 ng/L | LA PLAINE | |
| 35 ng/L | 65 ng/L | LA PLAINE | |
| 32 ng/L | 60 ng/L | LA PLAINE |
Show the 7 earlier checks (back to 29 April 2025)
| 34 ng/L – < 35 ng/L · calculated | 62 ng/L | LA PLAINE | |
| 38 ng/L – < 39 ng/L · calculated | 70 ng/L | LA PLAINE | |
| 61 ng/L – < 62 ng/L · calculated | 108 ng/L | LA PLAINE | |
| 57 ng/L – < 58 ng/L · calculated | 101 ng/L | LA PLAINE | |
| 63 ng/L – < 64 ng/L · calculated | 109 ng/L | LA PLAINE | |
| < 4 ng/L · calculated | 7 ng/L | ST ETIENNE DE ST GEOIRS CENTRE, MARANDA-BRION | |
| < 4 ng/L · calculated | < 100 ng/L | ST ETIENNE DE ST GEOIRS CENTRE |
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 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 6.4 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.074 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | N.M. µg/L | ≤ 6 µg/L | no verdict |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.07 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 | 7.7 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 14.86 °f | no limit | for reference |
| Electrical conductivity | 285 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 3.3 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 1.9 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 1.5 mg/L | ≤ 200 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 Saint-Étienne-de-Saint-Geoirs safe to drink?
Yes. At the check on 28 July 2026, the tap water in Saint-Étienne-de-Saint-Geoirs 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-Étienne-de-Saint-Geoirs's drinking water?
At the latest check the total of 20 PFAS ("forever chemicals") was below the laboratory's reporting limit of 29 ng/L. The EU limit is 100 ng/L, so this water is under 29 % of the limit. (below the EU limit)
Does the water in Saint-Étienne-de-Saint-Geoirs 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 Saint-Étienne-de-Saint-Geoirs's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 32 ng/L (8 August 2025) to 12 ng/L (28 July 2026) across 7 quantified checks. These history statistics use laboratory-published sums only.
How hard is the water in Saint-Étienne-de-Saint-Geoirs?
The water hardness in Saint-Étienne-de-Saint-Geoirs is 14.9 °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 28 September 2026.
Same water network
Same distribution network as Saint-Étienne-de-Saint-Geoirs, so in principle the same water.
Nearby communes
The closest to Saint-Étienne-de-Saint-Geoirs 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=38384
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 September 2026
- Supply networks
- LES AYES, ST ETIENNE DE ST GEOIRS CENTRE, MARANDA-BRION, LA PLAINE
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.