Drinking water quality in Caen

Region: Normandie Population: 109,400 Water supplier: EAUX DE NORMANDIE Latest sample: 9 June 2026
Fails the current legal limits

PFAS in drinking water

EU legal limit
0.0058 µg/L Limit: 0.1 µg/L within limit

The total of 20 PFAS ("forever chemicals") was last measured at 0.0058 µg/L. The EU limit is 0.1 µg/L, so this water is at 6 % of the limit. (9 June 2026)

Health limit (used in Sweden)
0 µg/L the 4 most harmful PFAS (PFAS-4) · Limit: 0.004 µg/L below health limit

The four most harmful PFAS add up to 0 µg/L, below the health limit of 0.004 µg/L used in Sweden since 2026.

Substances too small to measure count as 0, so the real total may be higher.

20 PFAS (see each substance)
Acide perfluoropentanoïque (PFPEA) 0.0024 µg/L
Acide perfluorohexanoïque (PFHXA) 0.0021 µg/L
Acide perfluorobutanoïque (PFBA) 0.0013 µg/L
Acide perfluorododécanoique (PFDoDA) <0,0010 µg/L
Acide perfluoropentane sulfonique (PFPS) <0,0010 µg/L
Acide perfluoro-decanoïque (PFDA) <0,001 µg/L
Acide perfluorododécane sulfonique (PFDoDS) <0,0020 µg/L
Acide perfluoro tridecanoique (PFTrDA) <0,002 µg/L
Acide perfluoroheptanoïque (PFHPA) <0,001 µg/L
Acide perfluoro tridecane sulfonique (PFTrDS) <0,0050 µg/L
Acide perfluorodecane sulfonique (PFDS) <0,0010 µg/L
Perfluorohexane sulfonate (PFHXS) <0,0010 µg/L
Acide perfluoro-octanoïque (PFOA) <0,0010 µg/L
Acide perfluorononane sulfonique (PFNS) <0,001 µg/L
Acide perfluoro undecane sulfonique (PFUnDS) <0,001 µg/L
Acide sulfonique de perfluorooctane (PFOS) <0,0010 µg/L
Acide perfluoroheptane sulfonique (PFHpS) <0,0010 µg/L
Acide sulfonique de perfluorobutane (PFBS) <0,0010 µg/L
Acide perfluoro undecanoïque (PFUnA) <0,0010 µg/L
Acide perfluoro-nonanoïque (PFNA) <0,0010 µg/L

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Water report for Caen

Official assessment

The latest official test failed at least one quality requirement.

„La teneur en chlorothalonil R417888 (produit de dégradation de pestici des) reste inférieure aux valeurs limites fixées dans l'arrêté préfectoral de dérogation à la limite de qualité. Un programme d'amél ioration de la qualité des eaux porté par la collectivité est en cours, avec un suivi régulier des teneurs. A noter également que la valeur indicative définie pour le chlorothalonil R471811 n'est pas satisfaite.Un suivi renforcé est mis en place pour suivre l'évolution de ce paramètre. L'eau peut être consommée sans restriction d'usage.“

Microbiology: within limit Chemistry: exceeded

Values to watch

These values are at least halfway to their legal limit, or over it.

Parameter Value Limit Status
Nitrate 33.7 mg/L ≤ 50 mg/L within limit
Show all 20 official measurements
Parameter Value Limit Status
Nitrate 33.7 mg/L ≤ 50 mg/L within limit
Nitrite <0,010 mg/L ≤ 0.5 mg/L within limit
Lead 2.4 µg/L ≤ 10 µg/L within limit
Copper 0.057 mg(Cu)/L ≤ 2 mg(Cu)/L within limit
Nickel 2.1 µg/L ≤ 20 µg/L within limit
Arsenic <0,25 µg/L ≤ 10 µg/L within limit
Cadmium <0,025 µg/L ≤ 5 µg/L within limit
Chromium 0.85 µg/L ≤ 50 µg/L within limit
Fluoride <0,10 mg/L ≤ 1.5 mg/L within limit
Escherichia coli <1 n/(100mL) ≤ 0 mL) within limit
Enterococci <1 n/(100mL) ≤ 0 mL) within limit
Coliform bacteria <1 n/(100mL) ≤ 0 mL) within limit
pH 7.3 unité pH 6.5–9 unité pH within limit
Water hardness 24.1 °f no limit informational
Electrical conductivity 586 µS/cm 200–1,100 µS/cm within limit
Chloride 44.6 mg/L ≤ 250 mg/L within limit
Sulphate 28 mg/L ≤ 250 mg/L within limit
Sodium 19.4 mg/L ≤ 200 mg/L within limit
Iron 4 µg/L ≤ 200 µg/L within limit
Turbidity 0.12 NFU ≤ 2 NFU within limit

See the full results

See every official test result for Caen, including each PFAS substance. Free, just leave your email.

Frequently asked questions

Is tap water in Caen safe to drink?

The latest official test failed at least one quality requirement.

How high are PFAS levels in Caen's drinking water?

The total of 20 PFAS ("forever chemicals") was last measured at 0.0058 µg/L. The EU limit is 0.1 µg/L, so this water is at 6 % of the limit. (below the EU limit)

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

Yes. Even against Europe's strictest limit, the health limit of 0.004 µg/L used in Sweden since 2026, the measured value of 0 µg/L stays below.

How hard is the water in Caen?

The water hardness in Caen is 24.1 °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 28 August 2026.

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=14118
License
Licence Ouverte / Open Licence (Etalab)
Retrieved
28 August 2026
Supply networks
ZONE HAUTE VAUCELLES, ZONE BASSE (CAEN), ZONE SNO, ZONE SURPRESSEE, ZONE HAUTE (CAEN), ZONE S.N.E.

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