U.S. EPA 



Air Quality Monitoring
The Opsis system is designated equivalent to 40 CFR.

 

Parameter	Report
SO2	EQSA-0495-101
NO2	EQNA-0495-102
O3	EQOA-0495-103

Opsis UV DOAS AQM system for benzene,
ammonia and nitric oxide is U.S. ETV EPA tested. 

 

Opsis SM200 particulate monitor is a designated method for PM_2.5 and PM₁₀.

 

Parameter	Report
PM2.5	EQPM-0812-203
PM10	EQPM-0810-193

 

U.S. EPA List of Designated Methods

The notification for PM_2,5 in the Federal Register >>

U.S. EPA website >>

U.S. ETV EPA website >>