Potable 1.1.0

Potable shows the results of the official sanitary control of tap water in France: the sanitary conclusion of the latest sample taken on the network that serves your commune, the detail of every analysed parameter, and how they change over time.

These results are established by the regional health agencies (ARS) and published by the French Ministry of Health through Hub'Eau. Potable shows them as published: it adds no score, no rating and no opinion of its own.

Features

• Find your commune offline, by name or postal code, with the department of each commune. “Near me” is optional: the location permission is only requested when you tap the button.
• The right distribution unit: when a commune is served by several, Potable lists them by district and remembers your choice; when it has none, it gives the possible causes and the ARS contact.
• The latest sample: the sanitary conclusion as published by the ARS, its date, the distributor, compliance (quality limits and quality references kept apart), and key parameters explained (hardness, also in °dH and mmol/L, nitrates, pH, free chlorine), with their quality limit or reference. A conclusion shared by several samples of the same day is shown once.
• Watched substances: PFAS (sum of 20), total pesticides, TFA, vinyl chloride, lead, arsenic, perchlorate, and chlordecone overseas. For each, the latest known measure within the history period, or “not analysed since…”; and how many pesticides were looked for and quantified.
• Search for a substance across the whole history of the unit, by a whole word of its published label.
• A box on the non-compliant samples of the last 12 months.
• “Questions about this water”: the ARS for a health question, the distributor for the water service.
• Every analysed parameter, grouped by family, with the published quality limit or reference and the relevance of pesticide metabolites according to ANSES.
• History: the curve of a parameter over 1, 3, 5 or 10 years, with the limit drawn when there is one, and the timeline of past samples, which can be filtered to non-compliances.
• Followed communes, readable offline, to export and import as a JSON file.
• Optional alerts, off by default: each new analysis, or only unfavourable conclusions, and a “Check now” button.
• Values, units and thresholds read in full words by TalkBack.
• In English and French; the official labels stay in French. Light, dark or system theme.

What Potable does not do

• No score, no rating, no ranking: Potable shows the conclusions of the ARS, in their own words.
• No health advice: the app does not tell you whether you can drink your water. If in doubt, the sheet of each commune names its ARS and its water distributor.
• Your own tap is not covered: samples are taken on the distribution unit, not in the private pipes of your building.
• The data are updated once a month: a result shown may be several weeks old.

Privacy

• A single server is contacted: hubeau.eaufrance.fr, over HTTPS. Requests contain the codes of the commune and unit you look up, and no identifier. The website of an ARS opens in your browser.
• Your position is never sent or stored: it is used once, on the phone, to find the nearest commune.
• No account and no Google service at all. No telemetry, no crash reports, no advertising. Your followed communes stay on your phone.

Sources

Hub'Eau “Qualité de l'eau potable” API: data from the French Ministry of Health and the ARS. Communes: Découpage administratif communal (geo.api.gouv.fr) and Code officiel géographique (INSEE), under the Licence Ouverte Etalab 2.0. Metabolites: ANSES table.

Potable is an independent application, not affiliated with Hub'Eau, the Ministry or the ARS.

Free software under the GNU GPL v3 licence.

License: GPL-3.0-only