| PRE-CHLORINATION FENA RESERVOIR | 246 | Gaseous Chlorination, Pre | Disinfection |
| BAFFLE CHAMBER | 248 | Chlorination (FRDS-1.5) | Disinfection |
| SEDIMENTATION TANK | 249 | Sedimentation | Disinfection by-products control |
| SEDIMENTATION TANK | 249 | Sedimentation | Inorganics removal |
| SEDIMENTATION TANK | 249 | Sedimentation | Iron removal |
| SAND FILTERS | 250 | Filtration, Slow Sand | Disinfection |
| SAND FILTERS | 250 | Filtration, Pressure Sand | Iron removal |
| COAGULATION | 252 | Coagulation | Disinfection by-products control |
| COAGULATION | 252 | Coagulation | Inorganics removal |
| CLEARWELL | 253 | Chlorination (FRDS-1.5) | Disinfection |
| FENA CHLORINATION | 254 | Chlorine Dioxide | Disinfection |
| FENA CHLORINATION | 254 | Gaseous Chlorination, Post | Disinfection |
| FLUORIDATION | 255 | Fluoridation | Disinfection |
| TP FOR WELL NCS-10 | 300 | Gaseous Chlorination, Post | Disinfection |
| TP NCS-2A | 305 | Gaseous Chlorination, Post | Disinfection |
| TP FOR WELL NCS-12 | 307 | Gaseous Chlorination, Post | Disinfection |
| TP FOR WELL NCS-11 | 309 | Gaseous Chlorination, Post | Disinfection |
| FENA WATER TREATMENT PLANT | 341 | Gaseous Chlorination, Pre | Disinfection |
| FENA WATER TREATMENT PLANT | 341 | Sedimentation | Particulate removal |
| FENA WATER TREATMENT PLANT | 341 | Filtration, Rapid Sand | Particulate removal |
| FENA WATER TREATMENT PLANT | 341 | Gaseous Chlorination, Pre | Disinfection |
| FENA WATER TREATMENT PLANT | 341 | Hypochlorination, Post | Disinfection |
| FENA WATER TREATMENT PLANT | 341 | Gaseous Chlorination, Post | Disinfection |
| FENA WATER TREATMENT PLANT | 341 | Coagulation | Particulate removal |
| FENA WATER TREATMENT PLANT | 341 | Flocculation | Particulate removal |
| CL2 NCS-8 | 342 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-5 | 343 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-6 | 344 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-7 | 345 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-3 | 346 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-9A | 347 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-2 | 348 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-2 | 348 | Gaseous Chlorination, Post | Disinfection |
| CL2 NCS-A | 349 | Gaseous Chlorination, Post | Disinfection |
| CL2 NRMC-1 | 350 | Gaseous Chlorination, Post | Disinfection |
| CL2 NRMC-2 | 360 | Gaseous Chlorination, Post | Disinfection |
| CL2 NRMC-3 | 361 | Gaseous Chlorination, Post | Disinfection |
| TP WELL NCS-B1 | 398 | Gaseous Chlorination, Post | Disinfection |
| TP FOR WELL A/B1 | 400 | Gaseous Chlorination, Post | Disinfection |
| TREATMENT PLANT ULTRA VIOLET BLDG. 596 | 500 | Ultraviolet Radiation | Disinfection |
| TREATMENT PLANT MIOX BLDG. 576 | 501 | Hypochlorination, Pre | Disinfection |
| SOUTH COMB. WELL PROD NCS 6, 7, 11, 12 | 570 | Hypochlorination, Pre | Disinfection |
| NORTH COMB. WELL PROD NCS 6, 7, 11, 12 | 571 | Hypochlorination, Pre | Disinfection |