Drinking water quality in Dissay
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at 0.0507 µg/L. The EU limit is 0.1 µg/L, so this water is at 51 % of the limit. (10 June 2026)
The four most harmful PFAS add up to 0.0152 µg/L. That is 3.8 times the health limit of 0.004 µg/L that Sweden made law in 2026. Germany will set a similar limit in 2028.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
Substances too small to measure count as 0, so the real total may be higher.
20 PFAS (see each substance)
| Acide sulfonique de perfluorobutane (PFBS) | 0.015 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.011 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0075 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0053 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.0029 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.0026 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.0024 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | 0.0022 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.0018 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,0050 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,0050 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0050 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0050 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0050 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0010 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,0050 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,010 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,010 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,010 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0010 µg/L |
Water report for Dissay
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Official assessment
The latest official test passed all quality requirements.
„Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.“
Values to watch
These values are at least halfway to their legal limit, or over it.
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Fluoride | 0.9 mg/L | ≤ 1.5 mg/L | within limit |
Show all 21 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 2.5 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within limit |
| Lead | 0.6 µg/L | ≤ 10 µg/L | within limit |
| Copper | <0,01 mg(Cu)/L | ≤ 2 mg(Cu)/L | within limit |
| Nickel | 1 µg/L | ≤ 20 µg/L | within limit |
| Arsenic | 0.5 µg/L | ≤ 10 µg/L | within limit |
| Cadmium | 0.085 µg/L | ≤ 5 µg/L | within limit |
| Chromium | <1 µg/L | ≤ 50 µg/L | within limit |
| Uranium | 2.7 µg/L | ≤ 30 µg/L | within limit |
| Fluoride | 0.9 mg/L | ≤ 1.5 mg/L | within limit |
| Escherichia coli | 0 n/(100mL) | ≤ 0 mL) | within limit |
| Enterococci | 0 n/(100mL) | ≤ 0 mL) | within limit |
| Coliform bacteria | 0 n/(100mL) | ≤ 0 mL) | within limit |
| pH | 7.5 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 27 °f | no limit | informational |
| Electrical conductivity | 627 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 35 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 38 mg/L | ≤ 250 mg/L | within limit |
| Sodium | 18 mg/L | ≤ 200 mg/L | within limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | <0,3 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Dissay safe to drink?
Yes. The latest official test (10 June 2026) checked the tap water in Dissay and it passed every requirement.
How high are PFAS levels in Dissay's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 0.0507 µg/L. The EU limit is 0.1 µg/L, so this water is at 51 % of the limit. (below the EU limit)
Does the water in Dissay also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 0.0152 µg/L. That is 3.8 times the health limit of 0.004 µg/L that Sweden made law in 2026. The water still passes the current EU limit (0.1 µg/L for the total of 20 PFAS).
How hard is the water in Dissay?
The water hardness in Dissay 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 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=86095
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- DISSAY AILLE, DISSAY MOUSSAIS
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.