PFAS in the tap water of Thil (Ain): 12 ng/L, 24x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
24× 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 Niévroz, on the same distribution network as Thil (THIL NIEVROZ). 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 97% of the cities we track
checked on 24 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.047 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.037 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.012 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.008 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.005 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.004 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.003 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
Fails a current legal limit. Here are some filter options.
- EU legal limit
- 116 ng/L sum of 20 PFAS, above the 100 ng/L limit
- Last PFAS test
- 24 July 2026
- Water supplier
- SUEZ EAU FRANCE - ARA
In Thil, the 4 most closely watched PFAS (PFAS-4) add up to 12 ng/L (0.012 µg/L) at the latest PFAS check on 24 July 2026. That's 24 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 116 ng/L (0.116 µg/L), above the EU legal limit (100 ng/L). Sampled in Niévroz, on the same network. 30 checks since 28 November 2025: PFAS-4 up to 16 ng/L, sometimes below the detection limit, averaging at least 10.3 ng/L over 12 months (non-detects as 0). No clear trend. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Thil
30 PFAS checks since 28 November 2025, values as published. Samples from 3 communes on the same network: it's the same water, so each one applies to Thil.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| 12 ng/L | 116 ng/L | Niévroz | |
| 12 ng/L | 108 ng/L | Thil | |
| 10 ng/L | 111 ng/L | Thil | |
| 15 ng/L | 135 ng/L | Thil | |
| 14 ng/L | 133 ng/L | Niévroz | |
| 14 ng/L | 133 ng/L | Thil | |
| < 4 ng/L | < 29 ng/L | Thil | |
| 13 ng/L | 121 ng/L | Thil | |
| 10 ng/L | 108 ng/L | Thil | |
| 12 ng/L | 111 ng/L | Niévroz | |
| 11 ng/L | 112 ng/L | Thil | |
| 12 ng/L | 109 ng/L | Thil |
Show the 18 earlier checks (back to 28 November 2025)
| 10 ng/L | 98 ng/L | Thil | |
| 7 ng/L | 63 ng/L | Niévroz | |
| 12 ng/L | 109 ng/L | Thil | |
| < 4 ng/L | < 29 ng/L | Thil | |
| 14 ng/L | 127 ng/L | Thil | |
| 13 ng/L | 124 ng/L | Niévroz | |
| 13 ng/L | 122 ng/L | Thil | |
| < 4 ng/L | < 29 ng/L | Thil | |
| 12 ng/L | 97 ng/L | Thil | |
| 11 ng/L | 111 ng/L | Niévroz | |
| 15 ng/L | 130 ng/L | Thil | |
| 11 ng/L | 109 ng/L | Thil | |
| 14 ng/L | 123 ng/L | Thil | |
| < 4 ng/L | < 29 ng/L | Thil | |
| 16 ng/L | 137 ng/L | Thil | |
| < 4 ng/L | < 29 ng/L | La Boisse | |
| 14 ng/L | 99 ng/L | Thil | |
| 12 ng/L | 106 ng/L | Thil |
“<” means not detected, the figure being the detection limit. “–” means not published. Labs have only reported the PFAS-4 sum (SANDRE code 9268) since autumn 2025. How to read a PFAS result
What the latest check found
At the latest check, the water was over at least one limit.
Values to watch
These results are close to their legal limit, or over it.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 38.3 mg/L | ≤ 50 mg/L | within the limit |
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 38.3 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 | <0,010 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 | 0.13 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 | 7.5 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 3.8 °f | no limit | for reference |
| Electrical conductivity | 665 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 20.3 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 25.4 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 113.2 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 Thil safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation non-conforme aux limites de qualité et conforme aux références de qualité.”
How high are PFAS levels in Thil's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 116 ng/L. The EU limit is 100 ng/L, so this water is at 116 % of the limit. (above the EU limit)
Does the water in Thil also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 12 ng/L. That is 3 times Sweden's legal limit of 4 ng/L, in force since 2026. Germany will set a similar one in 2028. The sum of 20 PFAS is 116 ng/L, above the EU legal limit of 100 ng/L.
Are PFAS levels rising in Thil's tap water?
No clear trend. Since 28 November 2025, 30 checks have been published; on the main network the PFAS-4 sum ranged between 7 ng/L and 16 ng/L (25 quantified values), at times below the detection limit. pfasnearme only reports a trend from a change of at least 25 % and 1 ng/L.
How hard is the water in Thil?
The water hardness in Thil is 3.8 °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 21 September 2026.
Same water network
Same distribution network as Thil, so in principle the same water.
Nearby communes
The closest to Thil 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=01418
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- THIL NIEVROZ
Water report for Thil
Get new PFAS results for Thil, 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.