We bought a house living completely off grid last year and decided to install a Microstation (Delphin I think is the manufacturer). We are waiting for a technician to arrive to finish the electrical side of the installtion but it all seems very good.
The problem is we receive a call from the Cabinet Nicot (not sure if that is spelt correctly) 2 days after the deadline for refusing our declaration de travaux. They werent happy that we were installing a microstation and said that the documentation which states the pollutants after filtration are 7% (standard tap water in france/europe is approx 24% pollutants) were lies, that it is impossible for the station to filter to less than the standard tap water. They also demanded I dig a trench 60m long x 1m wide x 1m deep filled with limestone to act as a secondary filter. They even suggested a company who could do this for me!!!! After some discussion with the guy who installed it and others who have something similar it seems the Nicot dont like the microstation as they cant "make any money" from it - just as a warning.
I read up on the options before hand and this definately seemed the easiest and smallest option hence my purchase.