pfasnearmeDrinking water quality from official sources

PFAS in Ampuis's tap water: 10 ng/L, 20x our 0.5 ng/L benchmark

Last PFAS check: · Source: Hub'eau

PFAS in drinking water

20× above our health benchmark

Amount found in the water 10 ng/L 0.01 µg/L · the 4 most harmful PFAS (PFAS-4)
Our health benchmark 0.5 ng/L

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.

How we chose 0.5 ng/L

More about this result
Legal limit in Sweden (since 2026) over the limit
2.5× this limit 10 ng/L · Limit: 4 ng/L
Limit in Denmark (since 2021) over the limit
5× this limit 10 ng/L · Limit: 2 ng/L
Limit in Germany (from 2028) within the limit
below this limit 10 ng/L · Limit: 20 ng/L

The US also limits PFOA and PFOS to 4 ng/L each, per substance.

One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).

More PFAS than in 96% of the cities we track

EU legal limit within the limit
29 % of the EU limit 0.029 µg/L · Limit: 0.1 µg/L

checked on 22 June 2026

20 PFAS (see each substance)
PFAS substance Value
Acide perfluorohexanoïque (PFHXA) 0.006 µg/L
Acide perfluoropentanoïque (PFPEA) 0.006 µg/L
Acide sulfonique de perfluorooctane (PFOS) 0.004 µg/L
Acide perfluorobutanoïque (PFBA) 0.003 µg/L
Perfluorohexane sulfonate (PFHXS) 0.002 µg/L
Acide sulfonique de perfluorobutane (PFBS) 0.002 µg/L
Acide perfluoro-octanoïque (PFOA) 0.002 µg/L
Acide perfluoroheptanoïque (PFHPA) 0.002 µg/L
Acide perfluoro-nonanoïque (PFNA) 0.002 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 perfluoro tridecanoique (PFTrDA) <0,001 µg/L
Acide perfluoro tridecane sulfonique (PFTrDS) <0,005 µg/L
Acide perfluoro undecanoïque (PFUnA) <0,001 µg/L
Acide perfluorononane sulfonique (PFNS) <0,002 µg/L
Acide perfluoro undecane sulfonique (PFUnDS) <0,002 µg/L
Acide perfluoroheptane sulfonique (PFHpS) <0,002 µg/L
Acide perfluoro-decanoïque (PFDA) <0,001 µg/L
Acide perfluoropentane sulfonique (PFPS) <0,001 µg/L

Above our health benchmark. Here are some filter options.

EU legal limit
29 ng/L sum of 20 PFAS, below the 100 ng/L limit
Last PFAS test
22 June 2026
Water supplier
ENTREPRISE CHOLTON

In Ampuis, the 4 most closely watched PFAS (PFAS-4) add up to 10 ng/L (0.01 µg/L) at the latest PFAS check on 22 June 2026. That's 20 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 29 ng/L (0.029 µg/L), below the EU legal limit (100 ng/L). 8 checks since 11 September 2025: PFAS-4 from 10 ng/L to 22 ng/L, averaging 19.6 ng/L over 12 months. Rising on the main network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).

Details and sources
Water supplier: ENTREPRISE CHOLTON Latest water check: 6 July 2026 Data updated on

PFAS over time in Ampuis

48 PFAS checks since 7 March 2023, from the published measurements. Samples from 17 communes on the same network: it's the same water, so each one applies to Ampuis. Samples come from 2 distribution networks. The trend refers to the network “MONTS DU LYONNAIS”.

“Calculated”: PFAS-4 worked out from the four substances in the same sample. The chart, averages and trends use lab-published sums only.

0.5 ng/L22 ng/L011 September 202522 June 2026
PFAS-4 sum per check in ng/L. Dashed line: pfasnearme's 0.5 ng/L benchmark. Hollow dots: below the detection limit.
DatePFAS-4Sum of 20 PFASSampled atNetwork
10 ng/L29 ng/LAmpuisAMPUIS-ST CYR BOURG
22 ng/L62 ng/LCondrieuMONTS DU LYONNAIS
17 ng/L51 ng/LChambost-LongessaigneMONTS DU LYONNAIS
22 ng/L61 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
14 ng/L36 ng/LAmpuisAMPUIS-ST CYR BOURG
22 ng/L67 ng/LSainte-CatherineMONTS DU LYONNAIS
11 ng/L38 ng/LAmpuisAMPUIS-ST CYR BOURG
15 ng/L56 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
22 ng/L · calculated63 ng/LPomeysMONTS DU LYONNAIS
9 ng/L · calculated30 ng/LAmpuisAMPUIS-ST CYR BOURG
10 ng/L · calculated29 ng/LSaint-Cyr-sur-le-RhôneAMPUIS-ST CYR BOURG
21 ng/L – < 22 ng/L · calculated60 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
Show the 36 earlier checks (back to 7 March 2023)
22 ng/L – < 23 ng/L · calculated72 ng/LChaussanMONTS DU LYONNAIS
12 ng/L · calculated51 ng/LAmpuisAMPUIS-ST CYR BOURG
12 ng/L · calculated35 ng/LAmpuisAMPUIS-ST CYR BOURG
22 ng/L – < 23 ng/L · calculated69 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
24 ng/L · calculated62 ng/LAveizeMONTS DU LYONNAIS
13 ng/L · calculated38 ng/LAmpuisAMPUIS-ST CYR BOURG
28 ng/L · calculated74 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
14 ng/L · calculated42 ng/LAmpuisAMPUIS-ST CYR BOURG
19 ng/L · calculated56 ng/LAmpuisAMPUIS-ST CYR BOURG
26 ng/L – < 27 ng/L · calculated78 ng/LMontrottierMONTS DU LYONNAIS
11 ng/L · calculated36 ng/LAmpuisAMPUIS-ST CYR BOURG
29 ng/L · calculated84 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
22 ng/L – < 23 ng/L · calculated64 ng/LSainte-Foy-l'ArgentièreMONTS DU LYONNAIS
31.4 ng/L – < 33.4 ng/L · calculated74.8 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
13.5 ng/L · calculated45 ng/LAmpuisAMPUIS-ST CYR BOURG
11.7 ng/L · calculated37.2 ng/LSaint-Cyr-sur-le-RhôneAMPUIS-ST CYR BOURG
26.4 ng/L – < 27.4 ng/L · calculated62.7 ng/LBrussieuMONTS DU LYONNAIS
18.9 ng/L – < 19.9 ng/L · calculated51.6 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
18.6 ng/L · calculated73.2 ng/LAmpuisAMPUIS-ST CYR BOURG
18.8 ng/L · calculated72.1 ng/LAmpuisAMPUIS-ST CYR BOURG
21.8 ng/L – < 22.8 ng/L · calculated60.7 ng/LHaute-RivoireMONTS DU LYONNAIS
29.5 ng/L · calculated62.5 ng/LSaint-Laurent-de-ChamoussetMONTS DU LYONNAIS
13.7 ng/L · calculated54.3 ng/LAmpuisAMPUIS-ST CYR BOURG
11.5 ng/L · calculated48.2 ng/LAmpuisAMPUIS-ST CYR BOURG
13.1 ng/L – < 14.1 ng/L · calculated49.9 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
15.9 ng/L – < 16.9 ng/L · calculated57.8 ng/LLarajasseMONTS DU LYONNAIS
9.8 ng/L · calculated46.6 ng/LAmpuisAMPUIS-ST CYR BOURG
17.4 ng/L – < 18.4 ng/L · calculated55.3 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
23.8 ng/L · calculated66.3 ng/LÉchalasMONTS DU LYONNAIS
10 ng/L · calculated57 ng/LSaint-Cyr-sur-le-RhôneAMPUIS-ST CYR BOURG
14.2 ng/L · calculated63.7 ng/LAmpuisAMPUIS-ST CYR BOURG
13.5 ng/L – < 14.5 ng/L · calculated43.7 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS
33.7 ng/L · calculated58.2 ng/LBessenayMONTS DU LYONNAIS
6.5 ng/L – < 16.5 ng/L · calculated49.2 ng/LAmpuisAMPUIS-ST CYR BOURG
9 ng/L – < 19 ng/L · calculated55 ng/LAmpuisAMPUIS-ST CYR BOURG
21.6 ng/L – < 31.6 ng/L · calculated60.5 ng/LGrigny-sur-RhôneMONTS DU LYONNAIS

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.

Microbiology: within the limit Chemistry: within the limit
See all 21 test results
What was tested Value Limit Status
Nitrate 11.7 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 0.068 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 0.24 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 7.4 unité pH 6.5–9 unité pH within the limit
Water hardness 26.19 °f no limit for reference
Electrical conductivity 549 µS/cm 200–1,100 µS/cm within the limit
Chloride 29 mg/L ≤ 250 mg/L within the limit
Sulphate 38 mg/L ≤ 250 mg/L within the limit
Sodium 17.6 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 Ampuis safe to drink?

Yes. At the check on 6 July 2026, the tap water in Ampuis 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 Ampuis's drinking water?

The total of 20 PFAS ("forever chemicals") was last measured at 29 ng/L. The EU limit is 100 ng/L, so this water is at 29 % of the limit. (below the EU limit)

Does the water in Ampuis also meet the strictest limits in Europe?

No. The four most harmful PFAS add up to 10 ng/L. That is 2.5 times Sweden's legal limit of 4 ng/L, in force since 2026. Germany will set a similar one in 2028. The water still passes the current EU legal limit (100 ng/L for the total of 20 PFAS).

Are PFAS levels rising in Ampuis's tap water?

Yes. On the main network, the PFAS-4 sum rose from 15 ng/L (11 September 2025) to 22 ng/L (22 May 2026) across 5 quantified checks. pfasnearme's benchmark is 0.5 ng/L as an annual mean. These history statistics use laboratory-published sums only.

How hard is the water in Ampuis?

The water hardness in Ampuis is 26.2 °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 Ampuis, so in principle the same water.

Chabanière
PFAS-4: 22 ng/L
Beauvallon
PFAS-4: 22 ng/L
Condrieu
PFAS-4: 8 ng/L
Saint-Martin-en-Haut
PFAS-4: 22 ng/L
Saint-Symphorien-sur-Coise
PFAS-4: 22 ng/L
Loire-sur-Rhône
PFAS-4: below 4 ng/L
Bessenay
PFAS-4: 22 ng/L
Saint-Laurent-de-Chamousset
PFAS-4: 22 ng/L

Nearby communes

The closest to Ampuis on this site.

Saint-Cyr-sur-le-Rhône
PFAS-4: 10 ng/L 2 km away
Tupin-et-Semons
PFAS-4: 10 ng/L 3 km away
Reventin-Vaugris
PFAS-4: 1 ng/L 4 km away
Chonas-l'Amballan
PFAS-4: below 4 ng/L 4 km away
Saint-Romain-en-Gal
PFAS-4: 2 ng/L 4 km away

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=69007
License
Licence Ouverte / Open Licence (Etalab)
Retrieved
21 September 2026
Supply networks
MONTS DU LYONNAIS, AMPUIS-ST CYR BOURG

This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.