Montgomery County
| Water | City of Rockville Water Dept | 301-424-7450 |
| Gas | Washington Gas Light Co | 703-750-1000 |
| Electricity | PEPCO | 202-833-7500 |
| Washington Suburban Sanitary Commission | 301-206-4001 | |
| Board of Education | 301-279-3000 | |
Baltimore & City
| Water Dept | 703-549-7080 | |
| Baltimore Gas & Electronic | 410-224-3000 | |
| Board of Education | County 410-887-5555 | City 410-396-8700 |
Frederick County
| Potomac Edison | 1-800-654-3317 |
| Water Dept | 301-694-1179 |
| Frederick Gas | 301-662-2151 |
| Board of Education | 301-694-1000 |
Prince Georges County
| Gas | Washington Gas Light Co | 703-750-1000 |
| Electricity | PEPCO | 202-833-7500 |
| Washington Suburban Sanitary Commission | 301-206-4001 | |
| Board of Education | 301-952-6000 | |
Howard County
| Baltimore Gas & Electronic | 410-995-0620 |
| Bureau of Utilities | 410-838-6000 |
| Board of Education- Bowie | 301-621-4019 |
| Board of Education- Laurel | 301-596-9149 |
| Board of Education- Ashton | 301-854-5466 |
Washington D.C.
| Water | Water Sewer Authority | 202-354-3600 |
| Gas | Washington Gas Light Co | 703-750-1000 |
| Electricity | PEPCO | 202-833-7500 |
| Washington Suburban Sanitary Commission | 301-206-4001 | |
| Board of Education | 202-727-4289 | |
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