The CRIIRAD website posts graphs of alpha, beta, and gamma radiation as well as iodine-131, for selected cities in France near nuclear power plants. The readings in Rhône river water show a sudden increase in iodine-131 and gamma radiation levels beginning on November 27. This river originates in Geneva, Switzerland, and there was a rainstorm there starting on Nov. 26 with about an inch of rain.
I have been watching these graphs for over a year now, and I have never seen a jump in gamma radiation like this.
Also, the CTBTO in Takasaki has now replaced the published levels of I-131, Ba-140, and Te-132 with ND (not detected) in the October data. Looks to me like someone had slipped up and shown the actual levels. They are now back to whitewashing radiation levels again.