France--spikes in iodine as well as beta in September--BRAWM please advise

Dear all, pls take a look at this CRIIRAD monitoring page
http://balisescriirad.free.fr/resultats_drome.htm
and click on "Avignon, balise aquatique" (blue circle). You will see big iodine spikes in September in some sort of water monitoring ("balise aquatique"??). These coincide with gamma spikes detected in air, also in Avignon. CRIIRAD says it's all due to storms, but how can radioactive iodine appear in water in September due to storms unless there are new releases from Fuku?
Would be glad of any help in understanding this.

Well, France has a LOT of

Well, France has a LOT of nuclear power plants and some of them might be leaking. Wouldn't doubt it! As in the U.S. a certain amount of iodine release is "allowable" from the plants. Isn't that comforting?

"Les activités volumiques

"Les activités volumiques ont dépassé ponctuellement la limite de détection (1 Bq/l) le 4 septembre. Ces dépassements ne sont pas liés à une contamination, mais sont très probablement dus aux orages qui ont entraîné une variation de la charge et du débit du Rhône.

Les fluctuations des valeurs en dessous de la limite de détection sont dues à l'électronique de comptage."

If CRIIRAD says that this increase is not connected to contamination...

sorry should've added...

Sorry should have added, beta spikes same date in Péage-de-Roussillon data, gamma spikes same date in Avignon.