| UNION | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | CREEKVIEW ELEMENTARY | 46 | 0 | 0.3 | NA |
| 2 | EAST ELEMENTARY | 48 | 0 | 2.6 | 2001 |
| 3 | EDGEWOOD ELEMENTARY | 44 | 0 | 3.1 | 2001 |
| 4 | FAIRBANKS CENTRAL OFFICE | 5 | 0 | 0.5 | 2005 |
| 5 | FAIRBANKS ELEMENTARY | 9 | 0 | 2.1 | 2005 |
| 6 | FAIRBANKS HS | 33 | 8 | 5.8 | 2005 |
| 7 | FAIRBANKS MS | 30 | 3 | 6.8 | 2005 |
| 8 | MARYSVILLE ADMIN AND TECH | 18 | 0 | 1.7 | 2001 |
| 9 | MARYSVILLE HS | 90 | 0 | 2.0 | 2001 |
| 10 | MARYSVILLE MS | 79 | NA | 7.1 | 2001 |
| 11 | MILL VALLEY ELEMENTARY | 56 | 0 | 2.6 | 2001 |
| 12 | NAVIN ELEMENTARY | 46 | 0 | 0.3 | NA |
| 13 | NORTH UNION HIGH SCHOOL | 33 | 4 | 7.0 | 1995 |
| 14 | RAYMOND ELEMENTARY | 20 | 1 | 5.5 | 2001 |
| 15 | ST JOHN LUTHERAN SCHOOL | 7 | 0 | 2.0 | 1994 |
| 16 | ST. PAUL LUTHERAN SCHOOL | 7 | NA | 4.0 | 1994 |
| 17 | TRINITY LUTHERAN SCHOOL | 12 | 5 | 5.8 | 1994 |