| Places | Water absorption area (m2) |
| Thewet Campus | – |
| North Bangkok Campus | |
| Car parking of engineering faculty | 1,723.30 |
| Car parking of science faculty | 278.98 |
| Backside of Institute of Gems, Thai Jewelry and Design building | 62.31 |
| Petanque Court | 189.05 |
| Bangkok Commercial Campus | |
| Car parking of business administration faculty | 554.07 |
| Area beside hotel and tourism operating building | 85.57 |
| ABack courtyard of Building 3 | 51.74 |
| Chotiwet Campus | |
| Ruen Panya building courtyard | 377.29 |
| Total | 3,322.29 |