The ammonia pollution of Tromorgan, an influential jarlot, is of agricultural origin, confirms the prefecture of Finistère in a press release. The origin of this pollution, which led to “significant fish mortality”, was detected in two different places.
First in Plouigneau, on Friday noon, in a slurry treatment station of a pig farm. “This pollution was caused by a leak on a treated slurry spreading pipe from a slurry treatment station of a pig farm”, indicate the authorities. The operator was notified and “immediately” closed the valves in the pipeline concerned. The next day, a second leak of slurry from a cattle farm was spotted in Plougonven.
“The services of the French office for biodiversity (OFB) as well as the gendarmerie immediately went on site to observe the pollution and take various samples”, specifies the prefecture. “The OFB notably asked the owner of the cattle farm to build an embankment to limit runoff into the wetland. »
A return to normal this Sunday
This pollution prevented on Saturday, from 2 p.m. to 7 p.m., the pumping activity of the Pillion plant [situé sur les rives du Jarlo, NDLR], an essential structure in these times of drought for the distribution of drinking water. “A changeover was made to the plant’s water reserves to continue supplying the drinking water distribution network to the tap for the population of the Morlaix community. »
Pumping was able to start again in the evening, after the analyzes showed that the ammonia content was below the tolerated limits. A return to normal is expected this Sunday. As a precaution, the water nevertheless remains under surveillance.
On Monday, August 1, inspectors from the environmental service of the departmental directorate for the protection of populations (DDPP) are expected on site to check the compliance of the effluent management facilities in the two operations. Criminal proceedings have been entrusted jointly by the prosecution to the gendarmerie and the French Office for Biodiversity (OFB).
letelegramme Fr Trans