| Groups of Municipalities (Number of People) | Municipal Environmental Problems―IMRS (Arithmetic Mean) | Geometric Annual Growth Rate (%) | ||||
| 2000 | 2002 | 2004 | 2006 | 2008 | ||
| Up to 20,000 | 0.335 | 0.352 | 0.350 | 0.350 | 0.421 | 2.9 |
| More than 20,000 to 50,000 | 0.350 | 0.361 | 0.365 | 0.368 | 0.459 | 3.4 |
| More than 50,000 to 100,000 | 0.337 | 0.354 | 0.352 | 0.352 | 0.427 | 3.0 |
| More than 100,000 to 300,000 | 0.377 | 0.383 | 0.397 | 0.407 | 0.508 | 3.8 |
| More than 300,000 to 700,000 | 0.385 | 0.434 | 0.460 | 0.549 | 0.626 | 6.3 |
| More than 700,000 | 0.425 | 0.517 | 0.529 | 0.635 | 0.649 | 5.4 |
| State of Minas Gerais | 0.341 | 0.357 | 0.357 | 0.358 | 0.435 | 3.1 |