| CARROLL | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | KILGORE ELEMENTARY SCHOOL | 7 | 2 | 13.2 | 1993 |
| CHAMPAIGN | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | EAST ELEMENTARY SCHOOL | 25 | 0 | 2.0 | 1998 |
| 2 | GRAHAM BOARD OFFICE | 9 | 0 | 3.0 | 1999 |
| 3 | GRAHAM HIGH SCHOOL | 68 | 1 | 4.8 | 1999 |
| 4 | GRAHAM JUNIOR HIGH SCHOOL | 10 | 0 | 2.0 | 1999 |
| 5 | GRAHAM NORTH ELEMENTARY | 29 | 0 | 3.0 | 1999 |
| 6 | GRAHAM SOUTH ELEMENTARY | 25 | 0 | 3.0 | 1999 |
| 7 | MECHANICSBURG HIGH SCHOOL | 25 | 1 | 10.1 | 1994 |
| 8 | MECHANICSBURG HIGH SCHOOL | 2 | NA | 6.9 | 1996/98 |
| 9 | NORTH ELEMENTARY SCHOOL | 15 | 0 | 3.0 | 1998 |
| 10 | SOUTH ELEMENTARY SCHOOL | 14 | 0 | 3.1 | 1998 |
| 11 | URBANA HIGH SCHOOL | 37 | 1 | 6.1 | 1998 |
| 12 | URBANA JUNIOR HIGH SCHOOL | 17 | 6 | 13.0 | 1998 |
| 13 | URBANA LOCAL ELEMENTARY SCHOOL | 11 | 0 | 3.8 | 1998 |
| CLARK | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | CENTRAL HIGH SCHOOL | 10 | 0 | 1.9 | 2003 |
| 2 | CLARK SHAWNEE LOCAL ROCKWAY EL/MNS | 16 | 0 | 1.9 | 2008 |
| 3 | CLARK SHAWNEE LOCAL ROCKWAY EL/MNS | 29 | 0 | 3.9 | 2008 |
| 4 | EMMANUEL CHIRISTIAN ACADEMY | 5 | 0 | 1.3 | 2008 |
| 5 | KENTON RIDGE HI( NORTHEASTERN LOCAL DIST) | 18 | 0 | 2.1 | 2008 |
| 6 | NIGHTINGALE MONTESSORI SCHOOL | 9 | 5 | 6.7 | 2003 |
| 7 | NORTH RIDGE( NORTH EASTERN LOCAL DIST | 53 | 4 | 6.1 | 2008 |
| 8 | NORTHEASTERN HI(NORHTEASTERN LOCAL DIST) | 47 | 0 | 3.4 | 2008 |
| 9 | NORTHEASTERN HIGH SCHOOL | 58 | 2 | 5.6 | 2003 |
| 10 | NORTHWESTERN LOCAL ELEMENTARY | 42 | 1 | 4.2 | 1995 |
| 11 | NORTHWESTERN LOCAL HIGH SCHOOL | 40 | 0 | 2.0 | 1995 |
| 12 | NORTHWESTERN LOCAL MIDDLE SCHOOL | 53 | 10 | 9.3 | 1995 |
| 13 | ROBERT N.WILLIAM KINDERGARDEN VILLAGE | 10 | 0 | 2.4 | 2008 |
| 14 | ROLLINGHILLS ELEM(NORTHEASTERN LOCAL DIST) | 35 | 15 | 6.3 | 2008 |
| 15 | SOUTH VIENNA( NORTHEASTERN SCHOOL DIST) | 53 | 0 | 3.6 | 2008 |
| 16 | SOUTHEASTERN HIGH SCHOOL | 25 | 1 | 10.0 | 1994 |
| CLERMONT | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | OHIO VALLEY VOICES | 15 | 0 | 1.1 | 2009 |
| CLINTON | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | EAST CLINTON LOCAL SCHOOL DISTRICT | 134 | 4 | 6.0 | 2008 |
| COLUMBIANA | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | EAST LIVERPOOL HS | 19 | 3 | 7.1 | 2005 |
| 2 | LACROFT ELEMENTARY | 22 | 4 | 4.7 | 2005 |
| 3 | NORTH ELEMENTARY | 20 | 20 | 48.0 | 2005 |
| 4 | NORTH ELEMENTARY SCHOOL | 9 | 0 | 0.4 | 2008 |
| 5 | UNITED LOCAL SCHOOL | 81 | 0 | 2.0 | 1998 |
| COSHOCTON | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | COSHOCTON COUNTY ALTERNATIVE SCHOOL | 4 | 2 | 5.9 | 2009 |
| 2 | RIDGEWOOD ELEMENTARY | 37 | 1 | 4.8 | 2009 |
| CRAWFORD | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | COL. CRAWFORD HIGH SCHOOL | 44 | 1 | 6.7 | 2002 |
| 2 | COL. CRAWFORD INTERMEDIATE SCHOOL | 9 | 0 | 1.1 | 2002 |
| 3 | CRESTLINE ADMINISTRATIVE OFFICE | 5 | 0 | 0.3 | 2003 |
| 4 | CRESTLINE MIDDLE SCHOOL | 29 | 1 | 6.2 | 2003 |
| 5 | CRESTLINE MIDDLE SCHOOL | 19 | 2 | NA | 1997 |
| 6 | CRESTLINE NORTH ELEMENTARY SCHOOL | 17 | 2 | 4.5 | 2003 |
| 7 | CRESTLINE NORTH ELEMENTARY SCHOOL | 23 | 7 | NA | 1997 |
| 8 | DAWSETT ELEMENTARY SCHOOL | 21 | 0 | 1.0 | 2003 |
| 9 | GALION HIGH SCHOOL | 17 | 4 | 7.6 | 2003 |
| 10 | GALION MIDDLE SCHOOL | 10 | 6 | 9.3 | 2003 |
| 11 | NORTH ELEMENTARY SCHOOL | 23 | 0 | 2.3 | 2003 |
| 12 | RENSCHVILLE ELEMENTARY SCHOOL | 21 | 0 | 1.3 | 2003 |
| 13 | SULPHER SPRINGS ELEMENTARY SCHOOL | 12 | 0 | 2.3 | 2002 |
| 14 | WAYSIDE CHRISTIAN SCHOOL | 15 | 1 | 4.0 | 2009 |
| 15 | WHETSTONE ELEMENTARY SCHOOL | 13 | 0 | 1.7 | 2002 |
| 16 | WILMA CRALL ELEMENTARY SCHOOL | 19 | 0 | 2.8 | 2003 |
| 17 | WYNFORD ELEMENTARY SCHOOL | 40 | 0 | 1.5 | 2001 |
| 18 | WYNFORD HIGH SCHOOL | 58 | 3 | 8.6 | 2001 |
| 19 | WYNFORD HIGH SCHOOL→ | 3 | NA | 8.6 | 2003/04 |
| 20 | WYNFORD SOUTH ELEMENTARY SCHOOL | 13 | 4 | 9.5 | 2000 |
| 21 | WYNFORD SOUTH ES → | 12 | NA | 9.5 | 1998/99 |
| CUYAHOGA | |||||
| Serial Number | Name of the School | Number of Rooms Tested | Rooms => Action Level of 4 pCi/L | Maximum Radon Concentration( pCi/l ) | Year |
| 1 | ADMIN BLDG. | 12 | 7 | 5.2 | 2001 |
| 2 | ALBION ELEMENTARY SCHOOL | 40 | 0 | 1.0 | 2002 |
| 3 | ALBION MS | 37 | 0 | 0.5 | 1998 |
| 4 | APEX ACADEMY | 40 | 0 | 1.1 | 2009 |
| 5 | BOULEVARD ELEMENTARY SCHOOL | 13 | 0 | 2.4 | 2008 |
| 6 | CENTER MIDDLE SCHOOL | 36 | 0 | 1.5 | 2000 |
| 7 | CONSTELLATION COMMUNITY SCHOOLS | 48 | 0 | 1.5 | 2009 |
| 8 | DRAKE ELEMENTARY SCHOOL | 30 | 0 | 1.1 | 2000 |
| 9 | FERNWAY ELEMENTARY SCHOOL | 18 | 0 | 1.6 | 2008 |
| 10 | GATES MILL ELEMENTARY SCHOOL | 1 | 0 | 2.0 | 2009 |
| 11 | GREEN ROAD DEVELOPMENT CENTER | 44 | 0 | 1.6 | 2009 |
| 12 | HOLY ROSARY MONTESSORI | 6 | 0 | 1.6 | 2009 |
| 13 | INDEPENDENCE HIGH SCHOOL | 63 | 0 | 2.3 | 2001 |
| 14 | INDEPENDENCE MIDDLE SCHOOL | 17 | 0 | 0.9 | 2001 |
| 15 | INDEPENDENCE PRIMARY ELEMENTARY | 45 | 0 | 1.7 | 2001 |
| 16 | LOMOND ELEMENTARY SCHOOL | 31 | 0 | 0.9 | 2008 |
| 17 | MADISON COUNTY SCHOOL | 14 | 0 | 3.5 | 2009 |
| 18 | MAGNIFICANT | 40 | 0 | 2.0 | 1999 |
| 19 | MARTIN LUTHER KING HIGH SCHOOL→ | 8 | 0 | 1.0 | 1994 |
| 20 | MERCER ELEMENTARY SCHOOL | 18 | 0 | 2.5 | 2008 |
| 21 | MURASKI ELEMENTARY SCHOOL | 33 | 0 | 1.0 | 2000 |
| 22 | NORTH ROYALTON ADMIN BLDG. | 12 | 0 | 2.4 | 2002 |
| 23 | NORTH ROYALTON HIGH SCHOOL | 82 | 0 | 1.6 | 2002 |
| 24 | NORTH ROYALTON MIDDLE SCHOOL | 62 | 0 | 1.1 | 2002 |
| 25 | OLD BROOKLYN COMMUNITY & MIDDLE SCHOOL | 17 | 0 | 1.1 | 2009 |
| 26 | ONAWAY ELEMENTARY SCHOOL | 20 | 0 | 1.0 | 2008 |
| 27 | PARMA COMMUNITY SCHOOLS | 21 | 0 | 1.2 | 2009 |
| 28 | PARMA DEVELOPMENT CENTER | 29 | 0 | 1.4 | 2009 |
| 29 | PINNACLE ACADEMY | 46 | 0 | 1.5 | 2009 |
| 30 | PURITAS COMMUNITY & MIDDLE SCHOOL | 27 | 0 | 0.8 | 2009 |
| 31 | ROYAL VIEW ELEMENTARY SCHOOL | 41 | 0 | 1.1 | 2002 |
| 32 | SHAKER HEIGHTS HIGH SCHOOL | 27 | 0 | 2.7 | 2008 |
| 33 | SHAKER HEIGHTS MIDDLE SCHOOL | 60 | 0 | 2.5 | 2008 |
| 34 | ST RAPHAEL | 20 | 5 | 6.0 | 1998 |
| 35 | STOCKYARD COMMUNITY SCHOOL | 12 | 0 | 0.3 | 2009 |
| 36 | SUNVIEW ELEMENTARY SCHOOL | 26 | 0 | 1.0 | 1998 |
| 37 | SURRARRER ELEMENTARY SCHOOL | 33 | 0 | 1.0 | 2000 |
| 38 | VALLEY VISTA ELEMENTARY SCHOOL | 35 | 0 | 0.5 | 2002 |
| 39 | WESTPARK COMMUNITY MIDDLE SCHOOL | 11 | 1 | 5.1 | 2009 |
| 40 | WESTPARK COMMUNITY SCHOOL | 13 | 0 | 0.7 | 2009 |
| 41 | WESTSIDE SCHOOL OF ARTS | 3 | 0 | 3.7 | 2009 |
| 42 | WILLIAM PATRICK DAY CENTER | 59 | 0 | 2.0 | 2009 |
| 43 | WILLOW ELEMENTARY SCHOOL→ | 19 | 0 | 2.0 | 1990 |
| 44 | WOODBURY ELEMENTARY SCHOOL | 29 | 0 | 2.5 | 2008 |