Air pollute stats for Merrimack Co in 2007
| County | Merrimack Co |
| State | New Hampshire |
| Data from year | 2007 |
| Total number of days monitored | 180 |
| Good air | 161 (89.44%) |
| Moderate air | 18 (10.00%) |
| Unhealthy for sensitive groups | 1 (0.56%) |
| Unhealthy for all | 0 (0.00%) |
|
| Worst pollutants |
|
| Carbon monoxide | 0 (0.00%) |
| Nitrogen dioxide | 0 (0.00%) |
| Ozone | 68 (37.78%) |