Second-highest eight-hour average carbon monoxide (CO) concentration in ppm for sites in New Hampshire. The eight-hour CO standard is 9 ppm.
| MAX 1-HR | MAX 8-HR | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Site ID | P O C | M T | City | County | Address | YR | REP ORG | # OBS | 1ST | 2ND | OBS > 35 | 1ST | 2ND | OBS > 9 | METH |
| 33-011-0018 | 1 | 2 | Manchester | Hillsborough | 20 Bridge Street | 97 | 001 | 8458 | 8 | 7 | 0 | 4.1 | 4 | 0 | 11 |
| 33-011-1009 | 1 | 2 | Nashua | Hillsborough | 25 Main Street, Matarazzo Building | 97 | 001 | 8520 | 9 | 9 | 0 | 5.4 | 5.3 | 0 | 11 |