| Group | Compounds | Concentration, ppm* | |
| Before Hurricane Harvey | After Hurricane Harvey | ||
| VOCs | Acetone | 0 | 1500 |
| Benzene | 0 | 380 | |
| Chloroform | 0 | 830 | |
| Ethylbenzene | 0 | 0 | |
| m,p-Xylene | 0 | 0 | |
| n-Butyl alcohol | 0 | 0 | |
| o-Xylene | 0 | 0 | |
| Toluene | 0 | 290 | |
| PAHs | Acenaphthalene | 0 | 0 |
| Acenaphthylene | 0 | 0.068 | |
| Anthracene | 0 | 0.032 | |
| Benzo[a]anthracene | 0 | 0.030 | |
| Benzo[a]pyrene | 0 | 0.028 | |
| Benzo[b]fluoranthene | 0 | 0.031 | |
| Benzo[g,h,i]perylene | 0 | 0.028 | |
| Benzo[k]fluoranthene | 0 | 0.029 | |
| Chrysene | 0 | 0.031 | |
| Dibenz[a,h]anthracene | 0 | 0.033 | |
| Fluoranthene | 0 | 0.0046 | |
| Fluorene | 0 | 0.043 | |
| Phenanthrene | 0 | 0.039 | |
| Phenol | 0 | 0 | |
| Pyrene | 0 | 0.034 | |