| TREATMENT_PLT-HERTFORD WTP | 71100 | Aeration, Spray | Disinfection by-products control |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Gaseous Chlorination, Post | Disinfection |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Gaseous Chlorination, Pre | Disinfection |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Filtration, Greensand | Iron removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Gaseous Chlorination, Pre | Iron removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Permanganate | Iron removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Ion Exchange | Inorganics removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Filtration, Greensand | Manganese removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Gaseous Chlorination, Pre | Manganese removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Permanganate | Manganese removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Gaseous Chlorination, Pre | Organics removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Permanganate | Organics removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Filtered | Particulate removal |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Ion Exchange | Softening (hardness removal) |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Aeration, Spray | Taste / odor control |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Gaseous Chlorination, Pre | Taste / odor control |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Permanganate | Taste / odor control |
| TREATMENT_PLT-HERTFORD WTP | 71100 | Sequestration | Manganese removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | pH Adjustment | Corrosion control |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Gaseous Chlorination, Pre | Disinfection |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Filtration, Rapid Sand | Iron removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Gaseous Chlorination, Pre | Iron removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Sedimentation | Iron removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | pH Adjustment | Iron removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Filtration, Rapid Sand | Manganese removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Gaseous Chlorination, Pre | Manganese removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | pH Adjustment, Pre | Manganese removal |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Filtration, Rapid Sand | Softening (hardness removal) |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Lime - Soda Ash Addition | Softening (hardness removal) |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Sedimentation | Softening (hardness removal) |
| TREATMENT_PLT_HERTFORD WTP | 8413 | Sludge Treatment | Softening (hardness removal) |