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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 | 7.1 | 01 AM | 32.9 | 08 PM |
| Texas | EL PASO CHAMIZAL | µg/m³ | 48 | 09 AM | 187 | 08 PM |
| New Mexico | LAS CRUCES ED | µg/m³ | 1 | 07 PM | 9 | 08 PM |
| Texas | SOCORRO HUECO | µg/m³ | 75 | 01 AM | 104.2 | 09 PM |
