EnviroReporter.com has in-depth databases of information from Spring 2011 to the present including Radiation Station Stats along with food and drink radiation testing from over a dozen nations in Radiation Food Lab.
We have been measuring in CPM because it is easier for most people to see the difference in radiation levels. The baseline external radiation background we’ve established for this location is 42 to 46 CPM which equals 0.012 to 0.013 mR/hr.
Over 10,000 multi-media radiation tests across America 2011-2019
Note that none of our readings at Radiation Station Santa Monica California [RSSMC] are impacted by radon progeny as we discuss in Beta Watch.
February 14, 2019 walking gamma inspections of rain in Santa Monica yield no radiation over background.
February 13, 2019
01:15 pm INT RSSMC RAIN SAMPLE: 38.0 CPM^^ OR NORMAL BACKGROUND
01:00 pm INT RSSMC BG: 42.9 CPM^^
February 10, 2019
01:50 pm INT RSSMC RAIN SAMPLE: 47.5 CPM^^ OR NORMAL BACKGROUND
12:55 pm INT RSSMC BG: 50.0 CPM^^
February 3, 2019
11:50 am INT RSSMC RAIN SAMPLE: 44.0 CPM^^ OR NORMAL BACKGROUND
11:35 am INT RSSMC BG: 42.1 CPM^^
February 2, 2019
12:35 am INT RSSMC RAIN SAMPLE: 40.4 CPM^^ OR NORMAL BACKGROUND
12:20 am INT RSSMC BG: 39.3 CPM^^
January 7, 2019
4:55 pm INT RSSMC HEPA FILTER DUST FROM 3 MACHINES FOR 18 DAYS: 165.4 CPM^^ OR 4.39 TIMES BACKGROUND. Over 6 times higher on per day average than previous HEPA dust measuring period.
4:20 pm INT RSSMC BG: 37.7 CPM^^
January 5, 2019
7:35 pm INT RSSMC RAIN SAMPLE: 46.1 CPM^^ OR BACKGROUND
7:15 pm INT RSSMC BG: 43.8 CPM^^
January 2, 2019
5:00 pm EST Southwest Michigan 1st floor room SNOW: 91.9 CPM^ or 143% OVER BACKGROUND
4:45 pm EST Southwest Michigan 1st floor room background: 37.9 CPM^