Northwest Territories Drinking Water Quality Database
Community Descriptions
For more details about the community's water system, click on the community name. For more information about the treatment system, click on the underlined system class.
| Community | Water Source | Type of Treatment Plant |
| Aklavik | Mackenzie River (Peel Channel) | Class 2 – Conventional (Package Plant) – (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Behchokö | Marian Lake / West Channel | Class 2 – Conventional (Package Plant) - (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Colville Lake | Colville Lake | Small System– Cartridge filtration with chlorine disinfection and storage. |
| Deline | Great Bear Lake | Small System - Cartridge filtration with UV and liquid chlorine disinfection and storage. |
| Dettah | City of Yellowknife (Yellowknife River) | None - truckfill station with liquid chlorine disinfection. |
| Enterprise | Town of Hay River (Great Slave Lake) | None (treated water comes from Town of Hay River via trucked delivery). |
| Fort Good Hope | Mackenzie River | Small System - Seasonal fill earthen reservoir and truckfill station with liquid chlorine disinfection (upgrade project currently underway). |
| Fort Liard | Groundwater under influence of surface water | Class 1 - Two pressure greensand filters with potassium permanganate feed, softening, liquid chlorine disinfection and storage. |
| Fort McPherson | Deep Water Lake | Class 2 – Conventional (Package Plant) - (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Fort Providence | Mackenzie River | Class 2 – Conventional (Package Plant) - (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Fort Resolution | Great Slave Lake (Resolution Bay) | Class 2 – Conventional (Package Plant) - (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Fort Simpson | Mackenzie River | Class 2 –Conventional (Package Plant) - (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Fort Smith | Slave River | Class 3 – Primary Settling Reservoir (summer only). Clarifiers (coagulation, flocculation and sedimentation combined), and rapid sand filtration. |
| Gamètì | Rae Lake | Small System - Truckfill station with liquid chlorine disinfection and backup generator. |
| Hay River | Great Slave Lake | Class 2 – Conventional (Package Plant) - (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Inuvik | Mackenzie River & 3 Mile Lake (winter) / Hidden Lake (summer) | Class 2 – Sand filters (winter only), tempering, gaseous chlorine disinfection, liquid fluoridation and storage. |
| Jean Marie River | Jean Marie River | Small System – Seasonal fill earthen reservoir and truckfill station with liquid chlorine disinfection (upgrade project currently underway). |
| Kakisa | Town of Hay River (Great Slave Lake) |
None (treated water comes from Town of Hay River via truck delivery). |
| K'atlodeeche First Nation | Town of Hay River (Great Slave Lake) | Truckfill station with underground reservoir and chlorine addition (treated water comes from Town of Hay River via supply line under the Hay River). |
| Lutselk’e | Great Slave Lake (Christie Bay) | Small System – Truckfill station with twin intakes with liquid chlorine disinfection, and backup generator (upgrade project currently underway). |
| Nahanni Butte | Groundwater | Class 1 - Two pressure greensand filters with potassium permanganate feed, softening, liquid chlorine disinfection and storage. |
| Norman Wells | Mackenzie River | Class 2 –Conventional (Package Plant) - (coagulation, flocculation, inclined tube settling and multi-media filtration) with liquid chlorine disinfection and storage. |
| Paulatuk | New Water Lake | Small System – Truckfill station with liquid chlorine disinfection, and backup generator. |
| Sachs Harbour | DOT (or MOT) Lake | Small System – Cartridge filtration with liquid chlorine disinfection and backup generator. |
| Trout Lake | Trout Lake | Small System – Seasonal fill earthen reservoir and truckfill station with liquid chlorine disinfection (upgrade project currently underway). |
| Tsiigehtchic | Tso Lake | Class 1 – Nanofiltration with liquid chlorine disinfection and storage. |
| Tuktoyaktuk | Kudlak Lake | Class 1 – Seasonal fill earthen reservoir. Pressure filtration with UV and liquid chlorine disinfection and storage. |
| Tulita | Great Bear River | Class 1 – Microfiltration with liquid chlorine disinfection and storage. |
| Ulukhaktok | RCAF Lake | Small System – Filtration with UV and liquid chlorine disinfection and storage. |
| Wekweètì | Snare Lake | Small System – Truckfill station with liquid chlorine disinfection and backup generator. |
| Whatì | Groundwater | Class 1 – Two pressure greensand filters with potassium permanganate feed, softening and liquid chlorine disinfection. |
| Wrigley | Groundwater under influence of surface water | Small System - Liquid chlorine disinfection and storage (upgrade project currently underway). |
| Yellowknife | Yellowknife River | Class 1 – tempering, gaseous chlorine disinfection and liquid fluoridation. |


