PFAS in Orly's tap water: 4 ng/L, 8x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
8× above our health benchmark
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 Choisy-le-Roi, on the same distribution network as Orly (EAU SEINE & BIEVRE). 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.
Substances below the detection limit count as 0, so the real total may be higher.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 90% of the cities we track
checked on 16 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Perfluorohexane sulfonate (PFHXS) | 0.002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,005 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 6 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 16 July 2026
- Water supplier
- EAU SEINE ET BIEVRE
In Orly, the 4 most closely watched PFAS (PFAS-4) add up to 4 ng/L (0.004 µg/L) at the latest PFAS check on 16 July 2026. That's 8 times our 0.5 ng/L health benchmark, exactly at Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 6 ng/L (0.006 µg/L), below the EU legal limit (100 ng/L). Sampled in Choisy-le-Roi, on the same network. 38 checks since 2 April 2025: sum of 20 PFAS up to 14 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 Orly
38 PFAS checks since 2 April 2025, from the published measurements.
“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 – < 8 ng/L · calculated | 6 ng/L | Choisy-le-Roi | |
| 5 ng/L – < 9 ng/L · calculated | 5 ng/L | Choisy-le-Roi | |
| 10 ng/L – < 12 ng/L · calculated | 12 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| 7 ng/L – < 11 ng/L · calculated | 7 ng/L | Choisy-le-Roi | |
| 5 ng/L – < 9 ng/L · calculated | 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| 5 ng/L – < 9 ng/L · calculated | 5 ng/L | Choisy-le-Roi | |
| 5 ng/L – < 9 ng/L · calculated | 5 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi |
Show the 26 earlier checks (back to 2 April 2025)
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| 5 ng/L – < 9 ng/L · calculated | 14 ng/L | Choisy-le-Roi | |
| 3 ng/L – < 9 ng/L · calculated | 3 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| 4 ng/L – < 10 ng/L · calculated | 4 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | 8 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| 2 ng/L – < 8 ng/L · calculated | 2 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi | |
| < 8 ng/L · calculated | < 5 ng/L | Choisy-le-Roi |
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 | 24 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Cadmium | <0,01 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.11 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 | 7.3 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 24.5 °f | no limit | for reference |
| Electrical conductivity | 549 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 30 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 46.8 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 13 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,10 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Orly safe to drink?
Yes. At the check on 16 July 2026, the tap water in Orly 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 Orly's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 6 ng/L. The EU limit is 100 ng/L, so this water is at 6 % of the limit. (below the EU limit)
Does the water in Orly also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 4 ng/L stays below.
Are PFAS levels rising in Orly'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 Orly?
The water hardness in Orly is 24.5 °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 Orly, so in principle the same water.
Nearby communes
The closest to Orly 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=94054
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- EAU SEINE & BIEVRE
Water report for Orly
Get new PFAS results for Orly, with a short explanation. At most one update a week, only when there's something new.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.