.png)
| County | Site | Units | 8-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Texas | ASCARATE PARK SE | ppb | 28 | 01 AM | 31 | 01 AM |
| Chihuahua | CANALES LIRA | ppb | 29 | 05 AM | 36 | 02 AM |
| New Mexico | CHAPARRAL | ppb | 32 | 01 AM | 28 | 01 AM |
| New Mexico | DESERT VIEW | ppb | 23 | 01 AM | 27 | 03 AM |
| Texas | EL PASO CHAMIZAL | ppb | 33 | 03 AM | 39 | 01 AM |
| Texas | IVANHOE | ppb | 30 | 01 AM | 32 | 01 AM |
| New Mexico | LA UNION | ppm | 29.8 | 02 AM | 33.2 | 02 AM |
| Chihuahua | PARQUE INDUSTRIAL FERNANDEZ | ppb | 29 | 05 AM | 36 | 03 AM |
| Chihuahua | PLANTA DE TRATIEMENTO | ppb | 26 | 01 AM | 34 | 02 AM |
| New Mexico | SANTA TERESA | ppb | 36 | 01 AM | 39 | 03 AM |
| Texas | SKYLINE PARK | ppb | 34 | 01 AM | 36 | 03 AM |
| Texas | SOCORRO HUECO | ppb | 29 | 01 AM | 34 | 01 AM |
| New Mexico | SOLANO DRIVE | ppb | 32 | 01 AM | 29 | 04 AM |
