Click for 2003 BTK Spray Schedule
All 2003 treatment maps are provided in Adobe PDF format. If you do not have Adobe Acrobat Reader, click here for a free download.
| Location | BTK | Pheromone Flakes Spray |
| Cook County | ||
| Barrington Hills 2 | July 1 | |
| Maple Lake 1 | Spring | |
| Maple Lake 2 | July 1 | |
| Sag Bridge | July 1 | |
| DuPage County | ||
| Argonne | July 1 | |
| Argonne SW | Spring | |
| Bartlett | Spring | |
| Burr Ridge | July 1 | |
| Downers Grove | July 1 | |
| Lyman Woods East | Spring | |
| Naperville North | Spring | |
| Roselle | Spring | |
| Warrenville | Spring | |
| Wood Dale | Spring | |
| Kane County | ||
| Barrington Hills 2 | July 1 | |
| Barrington Hills 3 | Spring | |
| Batavia | Spring | |
| Elgin | Spring | |
| Geneva | Spring | |
| Lily Lake | Spring | |
| Sleepy Hollow | July 1 | |
| St. Charles | July 1 | |
| McHenry County | ||
| Barrington Hills 1 | July 1 | |
| Cary | ||
| Deer Path | Spring | |
| Marengo Ridge | July 1 | |
| Menge Road | Spring | |
| Woodstock East | Spring | |
| Woodstock West | July 1 | |
| McHenry County General Aerial Spray Map | ||
| Will County | ||
| Goodings Grove | July 1 | |
| Naperville South | Spring | |
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