State Implementation
State-by-state acceptance of ALT-152A
The use of CAA's VirtualOpacity® platform has federal EPA approval. The states listed below have formally or informally indicated their acceptance of alternative opacity testing methods, including certifications conducted using ALT-152A protocol. Note that state agencies cannot explicitly endorse specific vendors or methodologies.
ALT-152A underwent validation using protocols identical to Method 9, establishing equivalent legal standing. As such, any legal challenge to ALT-152A would necessarily call into question the validity of Method 9 itself.
CAA has decades of experience in Method 9 certification. We stand firmly committed to defending all certifications we issue.
State ALT-152A Acceptance List
| State/Agency | Conditions |
| Alabama | |
| Alaska | |
| Arizona | SEE COMMENTS - Maricopa county in writing, Pima county verbal |
| Arkansas | |
| CA - Mojave Desert AQMD | |
| Colorado | |
| Delaware | Approval required on a case-by-case basis. |
| Florida | |
| Georgia | will approve on a case by case basis |
| Hawaii | |
| Idaho | Conditionally accepted. DEQ stipulates that certifications will only be accepted if the observer has previously conducted initial certification, or follow-up recertification, via the traditional field method. Exceptions will be considered on a case-by-case basis (e.g., if field certification is unavailable when needed, or if travel is not feasible due to financial restrictions or safety concerns). For further information, contact Emanuel Ziolkowski at Emanuel.Ziolkowski@deq.idaho.gov. |
| Indiana | |
| Iowa | |
| Kentucky | |
| Louisiana | |
| Minnesota | |
| Mississippi | |
| New Mexico | |
| North Carolina | |
| Ohio | |
| Oregon | |
| South Carolina | |
| Tennessee | |
| Texas | |
| Utah | |
| Virginia | |
| Washington | |
| West Virginia | |
| Wyoming |
