| Total requests for May 2010: 2,514 |
| Unique requests | Total requests | Query | Documents returned |
| 10 | 14 | region6 | 13,787 |
| 9 | 20 | mississippi | 22,449 |
| 9 | 11 | jobs | 26,411 |
| 8 | 14 | lead 67 | 21,143 |
| 7 | 12 | alabama | 25,236 |
| 7 | 11 | north carolina | 26,884 |
| 7 | 11 | florida | 4,190 |
| 7 | 8 | FLD981026420 | 0 |
| 7 | 7 | spcc | 48 |
| 7 | 7 | oil spill | 1,256 |
| 7 | 7 | form 8700-12 | 750 |
| 6 | 9 | training | 48,770 |
| 6 | 7 | organization charts | 94 |
| 6 | 7 | oil 198 | 1,259 |
| 6 | 7 | careers | 104 |
| 6 | 7 | asbestos | 20,555 |
| 6 | 6 | contact | 2,991 |
| 5 | 6 | NESHAP | 173 |
| 4 | 12 | tennessee | 60,665 |
| 4 | 6 | conference | 203 |
| 4 | 5 | wastewater | 604 |
| 4 | 5 | lead paint' | 259 |
| 4 | 5 | Gulf Oil Spill | 57,690 |
| 4 | 4 | superfund | 1,312 |
| 4 | 4 | louisiana. | 35,765 |
| 4 | 4 | gis | 163 |
| 4 | 4 | RSL | 5,151 |
| 4 | 4 | 40 cfr 63.10 | 172,354 |
| 3 | 8 | PRG | 18,120 |
| 3 | 8 | 38261 | 42,494 |
| 3 | 5 | tmdl | 181 |
| 3 | 5 | NESHAP REGULATIONS 484 | 29,346 |
| 3 | 5 | Georgia | 1,988 |
| 3 | 4 | societies president extinctions running issue impact beginning | 13,562 |
| 3 | 4 | ohio | 35,707 |
| 3 | 4 | npdes | 53,944 |
| 3 | 4 | jacksonville 299 | 36,583 |
| 3 | 4 | NEPA | 72,828 |
| 3 | 4 | FOIA | 65 |
| 3 | 3 | tires | 158 |
| 3 | 3 | rrp | 4 |
| 3 | 3 | psd | 165 |
| 3 | 3 | permit | 1,056 |
| 3 | 3 | federal facilities 315 | 1,410 |
| 3 | 3 | 833-B-92-001 | 3 |
| 2 | 18 | 73 fr 1738 | 36,597 |
| 2 | 14 | monsanto | 20,868 |
| 2 | 10 | emergency response 320 | 15,191 |
| 2 | 6 | qapp | 25,738 |
| 2 | 6 | management of contaminated media | 73,268 |
| 2 | 6 | RFP 292 | 24,287 |
| 2 | 5 | Kentucky | 29,727 |
| 2 | 5 | Indiana 278 | 29,171 |
| 2 | 4 | ust | 35,601 |
| 2 | 4 | swannanoa nc | 72,305 |
| 2 | 4 | stormwater | 36,323 |
| 2 | 4 | refrigerator | 35,563 |
| 2 | 4 | priority watersheds | 200 |
| 2 | 4 | lawrence fincher | 35,695 |
| 2 | 4 | california | 185 |
| 2 | 4 | SF-424 | 5,027 |
| 2 | 4 | EISOPQAM | 36,467 |
| 2 | 3 | texas 299 | 116 |
| 2 | 3 | sc | 48,846 |
| 2 | 3 | sampling protocol | 99,894 |
| 2 | 3 | sampling protocals | 48,596 |
| 2 | 3 | ore knob | 5 |
| 2 | 3 | internship | 5 |
| 2 | 3 | illinois | 222 |
| 2 | 3 | hospital | 246 |
| 2 | 3 | grants | 1,205 |
| 2 | 3 | freon | 22 |
| 2 | 3 | fish | 437 |
| 2 | 3 | copper basin | 98 |
| 2 | 3 | chrysotile | 7,125 |
| 2 | 3 | auto paint | 48,586 |
| 2 | 3 | Stauffer | 48 |
| 2 | 3 | PCS 3013 | 48,620 |
| 2 | 3 | Environmental Justice | 341 |
| 2 | 2 | title v permit | 3,024 |
| 2 | 2 | start | 1,067 |
| 2 | 2 | staff | 680 |
| 2 | 2 | renovate right pamphlet | 4 |
| 2 | 2 | recycling | 20 |
| 2 | 2 | phosphate | 19,192 |
| 2 | 2 | pesticide | 112 |
| 2 | 2 | memphis | 132 |
| 2 | 2 | location | 2,354 |
| 2 | 2 | invasive species | 175 |
| 2 | 2 | intern | 666 |
| 2 | 2 | hawaii | 78 |
| 2 | 2 | global warming | 36,716 |
| 2 | 2 | epcra | 90 |
| 2 | 2 | employment | 487 |
| 2 | 2 | dis | 54,403 |
| 2 | 2 | coal ash | 95 |
| 2 | 2 | cercla | 1,294 |
| 2 | 2 | brownfields | 768 |
| 2 | 2 | biosolids | 40 |
| 2 | 2 | benchmarks | 260 |
| 2 | 2 | air quality | 1,142 |