pfasnearmeDrinking water quality from official sources

PFAS in Saint-Cyr-sur-le-Rhône'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

Sample taken in Ampuis, on the same distribution network as Saint-Cyr-sur-le-Rhône (AMPUIS-ST CYR BOURG). The health authority samples one tap per network; a network carries the same treated water everywhere.

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 Saint-Cyr-sur-le-Rhône, 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). Sampled in Ampuis, on the same network. 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: 22 June 2026 Data updated on

PFAS over time in Saint-Cyr-sur-le-Rhône

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 Saint-Cyr-sur-le-Rhône. 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 14 test results
What was tested Value Limit Status
Nitrate 11.8 mg/L ≤ 50 mg/L within the limit
Nitrite <0,01 mg/L ≤ 0.5 mg/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 7.5 unité pH 6.5–9 unité pH within the limit
Water hardness 27.04 °f no limit for reference
Electrical conductivity 604 µS/cm 200–1,100 µS/cm within the limit
Chloride 28.4 mg/L ≤ 250 mg/L within the limit
Sulphate 42.7 mg/L ≤ 250 mg/L within the limit
Iron 22 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-Cyr-sur-le-Rhône safe to drink?

Yes. At the check on 22 June 2026, the tap water in Saint-Cyr-sur-le-Rhône 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-Cyr-sur-le-Rhône'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 Saint-Cyr-sur-le-Rhône 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 Saint-Cyr-sur-le-Rhône'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 Saint-Cyr-sur-le-Rhône?

The water hardness in Saint-Cyr-sur-le-Rhône is 27 °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 Saint-Cyr-sur-le-Rhône, 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
Ampuis
PFAS-4: 10 ng/L
Loire-sur-Rhône
PFAS-4: below 4 ng/L
Bessenay
PFAS-4: 22 ng/L

Nearby communes

The closest to Saint-Cyr-sur-le-Rhône on this site.

Saint-Romain-en-Gal
PFAS-4: 2 ng/L 3 km away
Sainte-Colombe
PFAS-4: 2 ng/L 3 km away
Tupin-et-Semons
PFAS-4: 10 ng/L 4 km away
Vienne
PFAS-4: 10 ng/L 4 km away
Reventin-Vaugris
PFAS-4: 1 ng/L 5 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=69193
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.