Update:   The EPA's servers have either been crashed by too much traffic   generated by this post, or the EPA has taken down the radiation data.  Check back  later to see if the EPA's servers are working.
Please note that the radiation readings I looked at were NORMAL when the site was still up.
As I've previously noted, the San Jose Mercury News reports:
EPA  officials, however,  refused to answer questions or make staff members  available to explain  the exact location and number of monitors, or the  levels of radiation,  if any, being recorded at existing monitors in  California. Margot  Perez-Sullivan, a spokeswoman at the EPA's  regional headquarters in San  Francisco, said the agency's written  statement would stand on its own. Critics said the public needs more information. "It's   disappointing," said Bill Magavern, director of Sierra Club  California.  "I have a strong suspicion that EPA is being silenced by  those in the  federal government who don't want anything to stand in the  way of a  nuclear power expansion in this country, heavily subsidized  by taxpayer  money."
However, even if the EPA won't publicly discuss radiation levels, we can go look at the EPA's numbers ourselves. ... and we don't need Anonymous to hack into the EPA's site to do it.
Specifically:
1. Click on the following link: https://cdxnode64.epa.gov/radnet-public/query.do
2.In the bottom right box labeled "Fixed Monitor Location", click on the location of the monitor that you want to see results from
3. In the lower left box labeled "Time Range Criteria", specify the date range for the desired radiation readings
4. The upper left box labeled "Available Parameters" gives various beta and gamma radiation readings. Highlight as many as parameters as you wish. Click the right arrow (to the right) to put them in the "Selected Parameters" box, or the double right arrow to select all.
5. Hit the "Submit" button at the bottom of the screen. If there are no results, hit the back button on your browser, select " Deployable Monitor List" to the right of "Monitor Type", and then manually highlight one of the monitors in the "Deployable Monitor Id" box.
6. Once you get results, you can create charts or graphs of the information. Just scroll down on the results page to the box labeled "Custom Graphical Plot", and choose your x-axis. I like "Measurement Start Date/Time".
7. Click either the "Scatter Plot" or "Line Graph" button at the bottom of the results page.
See this if you need further directions.