Actually, Carlsbad, NM & Hanford, WA are a mess. I'm sure there are others. Also, Billings, MT seems to be having issues, and there ain't no nuke plant there to my knowledge.
RADCON-4 Concern/Watch
G Good Site - Reliable but Alert condition not met U Unreliable Site - Unreliable site, not enough data points, and alert condition not met I Inactive Site - Reach RADCON-4 but went inactive - no more data List of RADCON-4 sites:
5:306 near Richmond, VA, US 275 2014-07-24 09:28:00 G 4:424 near Raleigh, NC, US 167 2014-07-23 08:50:00 I 4:530 near Saint Paul, MN, US 178 2014-07-24 15:06:00 G 5:608 near Tulsa, OK, US 345 2014-07-24 09:55:00 G 4:621 near San Angelo, TX, US 260 2014-07-24 11:35:00 G 5:636 near Harlingen, TX, US 213 2014-07-24 13:41:00 G 5:703 near Austin, TX, US 248 2014-07-24 13:44:00 G 5:811 near Billings, MT, US 823 2014-07-24 14:14:00 G 4:915 near San Diego, CA, US 146 2014-07-24 14:06:00 U 4:919 near Tucson, AZ, US 260 2014-07-24 14:09:00 G 4:937 near San Bernardino, CA, US 146 2014-07-24 14:11:00 G 5:937 near San Bernardino, CA, US 340 2014-07-24 14:11:00 G