Industry Solutions
Tap water quality in Rennes, Bretagne? Is it safe to drink?
The tap water quality in Rennes, Bretagne, France is generally considered safe for consumption. The water utility provider, Veolia Eau, ensures compliance with national and European Union water quality standards.
Key Points about Rennes's Water Quality:
- Source: Mainly surface water from local rivers and reservoirs, supplemented with groundwater sources.
- Testing: Regular testing is conducted to ensure adherence to health standards, monitoring for microorganisms, chemicals, and other impurities according to French regulations.
- Hardness: The water in Rennes is moderately hard, with calcium and magnesium levels potentially affecting taste and household appliances.
- Concerns: Residents may notice a mineral taste which can be mitigated with water filters; occasional high nitrate levels have been noted and are under review by local authorities.
While Rennes's water is safe to drink, using water filters or softeners can enhance taste and protect domestic appliances from calcification due to mineral deposits. Adopting such measures can improve both quality and comfort in daily household water use.
Check water quality in another city or zip code
Get Involved. Take Action
Contact Your Local Elected Official & Water Supply Company
One of the best ways for cleaner water is to talk to elected officials who have a say in water quality. Ask questions and demand actionable plans for healthier water.
Filter Out Contaminants
Check out different water filters to protect your water against the detected contaminants.
Which water purifier to get for Rennes, Bretagne?
 |  |  |  |  | |
|---|---|---|---|---|---|
Types of filters | GAC & Carbon | Micro filter | Ultra filter | Nano filter | Reverse Osmosis filter |
Particle size filtered | > 10 Microns | 10 to 0.1 Microns | 0.1 to 0.01 Microns | 0.01 to 0.001 Microns | < 0.0001 Microns |
Common Suspended Compounds | |||||
Sediments | |||||
Pollen | |||||
Giardia Cysts | |||||
Bacteria, Algae | |||||
Yeast Cells | |||||
Asbestos fibers | |||||
Blue Indigo Dye | |||||
Cryptosporidium | |||||
MicroPlastics | Some | ||||
PFAs -polyfluoroalkyl substances | Some | ||||
Arsenic, Lead, Cadmium, Mercury | |||||
Haloacetic acids (HAA5/HAA9) | |||||
Total trihalomethanes (TTHMs) | |||||
Viruses | Some | ||||
Colloidal Silica | Some | ||||
Common Dissolved solids | |||||
1,1-Dichloroethane | |||||
Tetrachloroethylene (perchloroethylene) | |||||
Trichloroethylene | |||||
Pesticides and Herbicides | Some | Some | |||
Synthetic Dyes | |||||
Bromide | Some | Some | Some | Some | |
Bromochloromethane | Some | Some | Some | Some | |
Hardness | Some | ||||
Aqueous Salts | Some | ||||
Endocrine disruptors | Some | ||||
Nitrate & nitrite | Some | ||||
1,4-Dioxane | Some | ||||
Aluminum | Some | ||||
Barium | Some | ||||
Chromium (total) | Some | ||||
Fluoride | Some | ||||
Manganese | Some | ||||
Molybdenum | Some | ||||
Selenium | Some | ||||
Strontium | Some | ||||
Trichlorofluoromethane | Some | ||||
Uranium, combined (pCi/L) | Some | ||||
What do we do? How do we help?
We have developed the TDSBot, an inexpensive IOT device that monitors, in real time, the Incoming and Outgoing TDS levels, temperature, flow rate and cumulative volume of water filtered. Easy to install, it works with all water purifiers including, sediment, GAC, Carbon, Micro, Ultra, Nano and Reverse Osmosis water filters. Key benefits:
- Know the incoming and filtered water quality in real time.
- Know the volume of water filtered by day, week, month and total.
- Know in advance when to change filter cartridges. Too often we tend to realize that they need changing after the water purifier has stopped working or worse, when the water smells bad.
- Change filters only when needed. Sometimes filters perform longer than their standard life due to better incoming water or lower usage. Reduce waste and save money.
- Quality data collected is aggregated to show real time water quality data to all the community.
TDSBot can be installed on water purifiers from Pentair, Culligan, 3M, Brita, BWT, iSpring, and most other brands. Supports sediment, GAC, Micro, Ultra, Nano and Reverse osmosis filters. It can remotely monitor filters attached to Coffee machines, Ice makers, soda fountains, water dispensers, ovens, laundry & dish washing, car wash found at Cafes, convenient stores, healthcare facilities, hotels, offices, restaurants, colleges, schools, hydroponic systems, and many more.
There are no TDSBots in Rennes, Bretagne that are sharing tap water quality. Be the first one to install one on your water purifier. We are giving $10 off. Apply coupon code - Rennes while checking out.
Ensure safe and healthy drinking water. Start sharing tape water quality in Rennes for the benefit of the community
Sustainability Impact Insights
TDSBot can generate a variety of sustainability data, including water usage metrics, identify areas of reducing water waste, leak detection and prevention, extend filter and equipment lifespan, predictive maintenance alerts to extend equipment life and reduce environmental impact.
Sustainability data can be easily showcased on your corporate website or publicly shared on your social media
920 958
Plastic Bottles Saved
7 625 Kg
CO2 Emissions Saved
USD 202 610
Bottled H2O/Maintenance Savings
21 351
Car Miles Avoided
762
Equivalent Trees Planted
460 479 L
Total Water Filtered
last update 03/21/2025
Learn About Water Quality
* A definition specific to a few codes is that “Safe drinking water” means water that meets all primary and secondary drinking water standards. Drinking water standards are set based on potential health impacts and also take into account the cost to meet the drinking water standard. Also, the U.S. Environmental Protection Agency (EPA) defines drinking water as safe when humans can drink it with low risk of immediate or long-term harm to your health. Although there may be health risks associated with certain contaminants found in drinking water not all contaminants are necessarily harmful.
** Based on the data collected from the TDSBots installed in Los Angeles, California
Water quality in neighboring cities:
Acigné, Bain-de-Bretagne, Betton, Bruz, Cancale, Cesson-Sévigné, Chantepie, Chartres-de-Bretagne, Châteaubourg, Châteaugiron, Châtillon-sur-Seiche, Combourg, Dinard, Dol-de-Bretagne, Fougères, Fouillard, Guichen, Janzé, Le Rheu, Liffré, Melesse, Montfort-sur-Meu, Mordelles, Pacé, Redon, Rennes, Saint-Grégoire, Saint-Jacques-de-la-Lande, Saint-Malo, Vern-sur-Seiche, Vitré
This website uses cookies. By continuing to browse the website, you are agreeing to our Privacy Policy and Cookie Policy
© 2020 - 2025 Water TDS Inс. All rights reserved.
Developed by Trident Software Sàrl.