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| County | Site | Units | 24-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| New Mexico | ANTHONY | µg/m³ | ||||
| Texas | ASCARATE PARK SE | µg/m³ | 9.2 | 02 PM | 15.1 | 11 AM |
| Texas | EL PASO CHAMIZAL | µg/m³ | 50 | 02 PM | 104 | 05 AM |
| New Mexico | LAS CRUCES ED | µg/m³ | 1 | 01 AM | 7 | 09 AM |
| Texas | SOCORRO HUECO | µg/m³ | 44.1 | 02 PM | 59.6 | 08 AM |
