PFAS in Nanterre's tap water: 3 ng/L, 6x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
6× 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 Suresnes, on the same distribution network as Nanterre (SENEO SUD). 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 88% of the cities we track
checked on 8 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.007 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.005 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.004 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 23 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 8 July 2026
- Water supplier
- SUEZ ENVIRONNEMENT
In Nanterre, the 4 most closely watched PFAS (PFAS-4) add up to 3 ng/L (0.003 µg/L) at the latest PFAS check on 8 July 2026. That's 6 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 23 ng/L (0.023 µg/L), below the EU legal limit (100 ng/L). Sampled in Suresnes, on the same network. 6 checks since 16 January 2026: PFAS-4 from 1 ng/L to 24 ng/L, averaging 10.17 ng/L over 12 months. 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 Nanterre
33 PFAS checks since 17 September 2024, from the published measurements. Samples from 3 communes on the same network: it's the same water, so each one applies to Nanterre.
“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 |
|---|---|---|---|
| 3 ng/L | 23 ng/L | Suresnes | |
| 1 ng/L | 12 ng/L | Suresnes | |
| 7 ng/L | 18 ng/L | Croissy-sur-Seine | |
| 24 ng/L | 66 ng/L | Aubergenville | |
| 21 ng/L | 54 ng/L | Aubergenville | |
| 5 ng/L | 15 ng/L | Suresnes | |
| 7 ng/L – < 8 ng/L · calculated | 20 ng/L | Aubergenville | |
| 14 ng/L – < 15 ng/L · calculated | 38 ng/L | Aubergenville | |
| 11 ng/L – < 12 ng/L · calculated | 29 ng/L | Croissy-sur-Seine | |
| < 4 ng/L · calculated | 8 ng/L | Suresnes | |
| < 4 ng/L · calculated | 4 ng/L | Suresnes | |
| 10 ng/L – < 11 ng/L · calculated | 34 ng/L | Aubergenville |
Show the 21 earlier checks (back to 17 September 2024)
| 8 ng/L – < 9 ng/L · calculated | 22 ng/L | Aubergenville | |
| 10 ng/L – < 11 ng/L · calculated | 33 ng/L | Aubergenville | |
| 15 ng/L – < 16 ng/L · calculated | 43 ng/L | Aubergenville | |
| 8 ng/L – < 9 ng/L · calculated | 26 ng/L | Croissy-sur-Seine | |
| 4 ng/L – < 5 ng/L · calculated | 27 ng/L | Suresnes | |
| 19 ng/L – < 20 ng/L · calculated | 52 ng/L | Aubergenville | |
| 2 ng/L – < 4 ng/L · calculated | 22 ng/L | Aubergenville | |
| 6 ng/L · calculated | 27 ng/L | Suresnes | |
| 23 ng/L – < 24 ng/L · calculated | 57 ng/L | Aubergenville | |
| 6 ng/L – < 7 ng/L · calculated | 22 ng/L | Croissy-sur-Seine | |
| 1 ng/L – < 4 ng/L · calculated | 12 ng/L | Suresnes | |
| 24 ng/L – < 25 ng/L · calculated | 60 ng/L | Aubergenville | |
| 16 ng/L – < 17 ng/L · calculated | 47 ng/L | Aubergenville | |
| 1 ng/L – < 4 ng/L · calculated | 14 ng/L | Suresnes | |
| 7 ng/L – < 8 ng/L · calculated | 21 ng/L | Croissy-sur-Seine | |
| 1 ng/L – < 4 ng/L · calculated | 16 ng/L | Suresnes | |
| < 4 ng/L · calculated | 11 ng/L | Aubergenville | |
| < 4 ng/L · calculated | 13 ng/L | Suresnes | |
| 15 ng/L – < 16 ng/L · calculated | 47 ng/L | Aubergenville | |
| 11 ng/L – < 12 ng/L · calculated | 23 ng/L | Croissy-sur-Seine | |
| 11 ng/L – < 12 ng/L · calculated | 23 ng/L | Croissy-sur-Seine |
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 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 21.2 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 | 0.098 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/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 | 7.65 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 16.27 °f | no limit | for reference |
| Electrical conductivity | 571 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 37.8 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 51 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 Nanterre safe to drink?
Yes. At the check on 8 July 2026, the tap water in Nanterre was within every limit tested. “Ce prélèvement a montré un dépassement des exigences de qualité sur l e paramètre température. Ce dépassement estait ponctuel et représentat if du point. Les autres paramètres mesurés ont montré des résultats onformes aux prescriptions réglementaires en vigueur.”
How high are PFAS levels in Nanterre's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 23 ng/L. The EU limit is 100 ng/L, so this water is at 23 % of the limit. (below the EU limit)
Does the water in Nanterre 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 3 ng/L stays below.
Are PFAS levels rising in Nanterre's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 5 ng/L (16 January 2026) to 3 ng/L (8 July 2026) across 6 quantified checks. These history statistics use laboratory-published sums only.
How hard is the water in Nanterre?
The water hardness in Nanterre is 16.3 °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 Nanterre, so in principle the same water.
Nearby communes
The closest to Nanterre 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=92050
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SENEO SUD
Water report for Nanterre
Get new PFAS results for Nanterre, 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.