PFAS in Bailly-Romainvilliers's tap water: under 4 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
None of the 4 most harmful PFAS detected
The lab sees nothing below 4 ng/L, 8 times our benchmark of 0.5 ng/L. Water above our benchmark would pass this check unnoticed.
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 Coupvray, on the same distribution network as Bailly-Romainvilliers (SERRIS - SAN VAL D'EUROPE). 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.
The lab detects each of the four substances from 1 ng/L upward. None reached that limit, so their total is below 4 ng/L rather than zero.
checked on 24 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <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 perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
Fails a current legal limit. The details are below.
Water report for Bailly-Romainvilliers
Get new PFAS results for Bailly-Romainvilliers, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- 2 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 24 July 2026
- Water supplier
- SAUR CENTRE ILE DE FRANCE
In Bailly-Romainvilliers, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 24 July 2026. The total is below 4 ng/L, the sum of the detection limits and 8 times our 0.5 ng/L benchmark. Sum of 20 PFAS: 2 ng/L (0.002 µg/L), below the EU legal limit (100 ng/L). Sampled in Coupvray, on the same network. 5 checks since 20 January 2026: PFAS-4 up to 6 ng/L, sometimes below the detection limit, averaging at least 1.2 ng/L over 12 months (non-detects as 0). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Bailly-Romainvilliers
8 PFAS checks since 15 April 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Bailly-Romainvilliers.
“Calculated”: PFAS-4 worked out from the four substances in the same sample. The chart, averages and trends use lab-published sums only.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| < 4 ng/L | 2 ng/L | Coupvray | |
| 6 ng/L | 22 ng/L | Bailly-Romainvilliers | |
| < 4 ng/L | < 29 ng/L | Coupvray | |
| < 4 ng/L | 2 ng/L | Bailly-Romainvilliers | |
| < 4 ng/L | < 29 ng/L | Coupvray | |
| < 4 ng/L · calculated | < 29 ng/L | Bailly-Romainvilliers | |
| < 4 ng/L · calculated | 2 ng/L | Coupvray | |
| < 4 ng/L · calculated | < 100 ng/L | Bailly-Romainvilliers |
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 over at least one limit.
See all 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 15.9 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.1 mg/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 | <5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.28 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 | 7.9 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 28.6 °f | no limit | for reference |
| Electrical conductivity | 630 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 38.7 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 61 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 19.8 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.17 NFU | ≤ 1 NFU | within the limit |
Frequently asked questions
Is tap water in Bailly-Romainvilliers safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation non-conforme aux limites de qualité pour les paramètres Chlorates et Bromates. Le recontrôle effectué le 16/07/2026 a confirmé cette non-conformité. Ce phénomène coïncide avec l'épisode caniculaire exceptionnel observé entre fin juin et début juillet et la dégradation des conditions de fonctionnement du procédé de désinfection de la station. Des mesures correctives ont été mises en place par la PRPDE. Eau d'alimentation ne satisfaisant pas aux références de qualité pour le paramètre équilibre calcocarbonique. L'eau du réseau est considérée comme incrustante. Elle ne représente aucun danger pour la santé.”
How high are PFAS levels in Bailly-Romainvilliers's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 2 ng/L. The EU limit is 100 ng/L, so this water is at 2 % of the limit. (below the EU limit)
Does the water in Bailly-Romainvilliers also meet the strictest limits in Europe?
As far as this check can tell, yes. None of the four compounds was quantified, so their total is below 4 ng/L, the sum of the laboratory's detection limits, and under Sweden's legal limit of 4 ng/L in force since 2026.
Are PFAS levels rising in Bailly-Romainvilliers's tap water?
Too few quantified checks to say (1 since 15 April 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values. These history statistics use laboratory-published sums only.
How hard is the water in Bailly-Romainvilliers?
The water hardness in Bailly-Romainvilliers is 28.6 °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 Bailly-Romainvilliers, so in principle the same water.
Nearby communes
The closest to Bailly-Romainvilliers 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=77018
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SERRIS - SAN VAL D'EUROPE
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.