| Chemicals | Detection method | Equipment name | Lowest detectable limit (mg/L) |
| TCM | Standard examination method for drinking water GB/T 5750.8-2006 | Gas chromatograph with Electron capture detector | 0.06 |
| DBCM | 0.1 | ||
| BDCM | 0.06 | ||
| TBM | 0.1 |