| Total requests for Dec 2011: 637 |
| Unique requests | Total requests | Query | Documents returned |
| 10 | 11 | radon | 220 |
| 9 | 11 | radon test kit | 8,894 |
| 6 | 8 | radon mitigation | 15,515 |
| 6 | 6 | radon test | 227 |
| 5 | 7 | mold | 12,375 |
| 5 | 7 | lead | 12,834 |
| 5 | 6 | EPA 402-R-93-078 | 9 |
| 5 | 5 | radon in water | 196 |
| 4 | 7 | what is radon | 12,154 |
| 4 | 5 | asbestos | 43 |
| 4 | 5 | Carbon Monoxide | 17,204 |
| 4 | 4 | ASTM E2121-09 | 2 |
| 3 | 3 | test kits | 84 |
| 3 | 3 | mitigation | 83 |
| 3 | 3 | drinking water | 167 |
| 3 | 3 | GRANITE | 7 |
| 3 | 3 | Arsenic | 2 |
| 3 | 3 | 402-k-01-002 | 2 |
| 2 | 4 | contractors | 23,083 |
| 2 | 3 | radon zones | 177 |
| 2 | 3 | radon regulation | 60,334 |
| 2 | 3 | radon kits | 85 |
| 2 | 3 | Health Risk | 36,134 |
| 2 | 2 | slab | 9 |
| 2 | 2 | radon levels | 182 |
| 2 | 2 | radon in well water | 180 |
| 2 | 2 | mold remediation | 9 |
| 2 | 2 | home testing | 220 |
| 2 | 2 | granite radon | 7 |
| 2 | 2 | free radon test kit | 49 |
| 2 | 2 | formaldehyde | 3 |
| 2 | 2 | black mold | 0 |
| 2 | 2 | Radon certification | 9 |
| 1 | 6 | 2121 | 5 |
| 1 | 5 | vapor intrusion guidance | 16,179 |
| 1 | 5 | give us answer | 14 |
| 1 | 5 | abestos | 34,422 |
| 1 | 5 | ASTME 1465-08 | 34,480 |
| 1 | 4 | radiation indoor environments | 41,101 |
| 1 | 4 | linea directa de informacion sobre radon | 25,512 |
| 1 | 4 | consomtration | 0 |
| 1 | 4 | closed house candidness | 47,899 |
| 1 | 4 | Radón | 21,849 |
| 1 | 3 | winner of the challenger Maui thaw | 74,666 |
| 1 | 3 | ventilation rate | 5 |
| 1 | 3 | silica | 27,168 |
| 1 | 3 | radon in granite countertops | 55,801 |
| 1 | 3 | radon gas office in Virginia | 5 |
| 1 | 3 | psas | 27 |
| 1 | 3 | epa mercury | 3 |
| 1 | 3 | epa lead | 30,104 |
| 1 | 3 | Mirpur | 0 |
| 1 | 3 | Health Risk defenition | 31,039 |
| 1 | 3 | EPA 402-K-06-094 December 2006 | 1 |
| 1 | 3 | Diquat | 0 |
| 1 | 2 | why is smoking is bad | 0 |
| 1 | 2 | radon usa maps | 183 |
| 1 | 2 | radon laws we use | 41,580 |
| 1 | 2 | radon lab | 0 |
| 1 | 2 | radon in mining milling | 2 |
| 1 | 2 | radon in frederick | 52,002 |
| 1 | 2 | publications for the public | 56,027 |
| 1 | 2 | pitt county | 3 |
| 1 | 2 | particulates | 42,253 |
| 1 | 2 | new jersey | 47,824 |
| 1 | 2 | lupus | 17 |
| 1 | 2 | guideline value | 43,102 |
| 1 | 2 | granite countertops | 4 |
| 1 | 2 | epa location information | 45,554 |
| 1 | 2 | construction waste | 50,509 |
| 1 | 2 | closed house conditons | 0 |
| 1 | 2 | chemical vapors | 73,500 |
| 1 | 2 | can weather affect test outcome | 0 |
| 1 | 2 | asbestos testing | 98,200 |
| 1 | 2 | Spokane | 3 |
| 1 | 2 | Relative percent difference | 39,002 |
| 1 | 2 | Radon gas | 89 |
| 1 | 2 | Radon fetal development | 44,349 |
| 1 | 2 | Nantucket | 41,199 |
| 1 | 2 | Marbury | 48,649 |
| 1 | 2 | Health Risk definition | 46,288 |
| 1 | 2 | HAZWOPER training | 47,349 |
| 1 | 2 | Georgia radon Map | 31 |
| 1 | 2 | EPA approved radon testing companies | 48,354 |
| 1 | 2 | EC | 44,551 |
| 1 | 2 | DIY radon mitigation | 5 |
| 1 | 2 | Cheektowaga new york | 0 |
| 1 | 2 | Centex | 16 |
| 1 | 2 | Action level | 170 |
| 1 | 2 | 12 hour closed house condition rule | 0 |
| 1 | 1 | zip code | 10 |
| 1 | 1 | wyoming | 21 |
| 1 | 1 | woman zone | 6 |
| 1 | 1 | who child care | 97,600 |
| 1 | 1 | who can install redon equipment | 0 |
| 1 | 1 | who can install radon equipment | 6 |
| 1 | 1 | where to get radon test kits | 42 |
| 1 | 1 | where to buy radon test kit | 7 |
| 1 | 1 | where is radonfound | 0 |
| 1 | 1 | what | 242 |
| 1 | 1 | what states require radon mitigation licenses | 2 |