State Implementation
State-by-state acceptance of ALT-152
The use of CAA's VirtualOpacity℠ platform has federal 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/Agency | Conditions |
| Alabama | |
| Alaska | |
| Arizona | SEE COMMENTS - Maricopa county in writing, Pima county verbal |
| CA - Mojave Desert AQMD | |
| Colorado | |
| Delaware | Approval required on a case-by-case basis. |
| Florida | |
| Georgia | |
| Hawaii | |
| Indiana | |
| Iowa | |
| Kentucky | |
| Louisiana | |
| Minnesota | |
| Mississippi | |
| New Mexico | |
| North Carolina | |
| Ohio | |
| South Carolina | |
| Tennessee | |
| Texas | |
| Utah | |
| Virginia | |
| West Virginia | |
| Wyoming |
