Don't bite down on that suicide pill just yet, but the U.S. Environmental Protection Agency says radiation levels at West Coast monitors are up slightly.

The readings follow last week's arrival of radiation from Japan's ailing Fukushima nuclear reactors, which are in dire straights and which still could be sending bad air via the jet stream to California.

Here's what the EPA states:

During detailed filter analyses from 12 RadNet air monitor locations across the nation, the U.S. Environmental Protection Agency (EPA) identified trace amounts of radioactive isotopes consistent with the Japanese nuclear incident. Some of the filter results show levels slightly higher than those found by EPA monitors last week and a Department of Energy monitor the week before. These types of findings are to be expected in the coming days and are still far below levels of public health concern.

The jet stream in action.; Credit: The New York Times

The jet stream in action.; Credit: The New York Times

Monitors that measured the higher-than-average radiation included at least one in California as well as monitors in Alaska, Alabama, Guam, Hawaii, Idaho, Nevada, Saipan, Northern Mariana Islands and Washington state.

Should you be alarmed? Guess not.

The good news is that the jet stream from Japan is no longer hitting Southern California quasi-directly this week: It's predicted that a high-pressure system will keep it to the north.

Still, if you're concerned, keep an eye on LA Weekly contributor Michael Collins' Santa Monica monitor:

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