GNWT - Great Slave Lake Water Quality Monitoring Program

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The Great Slave Water Quality Monitoring Program is one component of the proposed Great Slave Lake Research and Monitoring Program which is in development with water partners to: coordinate long-term collection of baseline water quality across the lake; assess trends in water quality and quantity; carry out vulnerability assessments; better understand natural variability and changes being observed in the watershed; and to create long term capacity building research and monitoring partnerships.

Version 1.0.0
Data Steward Email
Data Collection Organization GNWT ECC Water Monitoring and Stewardship Division
Data Upload Organization Government of the Northwest Territories – Department of Environment and Climate Change
Progress Code onGoing
Maintenance Frequency Code annually
Topic Category Code inlandWaters, oceans
Keywords Great Slave Lake, monitoring, water quality, water chemistry
Spatial Extent -114.508° 61.985°, -110.117° 62.867° (W S, E N)
Vertical Extent -100 m to 0 m
Temporal Extent 2020-08-17 to 2023-10-12
Date Published
Alternate Formats FGP-HNAP ISO:19115-2 (XML) , W3C DCAT (XML) , W3C DCAT (JSON-LD)


GNWT ECC Water Monitoring and Stewardship Division. 2024-04-19. "GNWT - Great Slave Lake Water Quality Monitoring Program" (dataset). 1.0.0. DataStream.

Funding Sources

Government of the Northwest Territories

Data Collection Information

Water samples are collected 2-5 samples per year depending on the location of the sample site. Surface water grab samples are collected at ~10 cm – 50 cm beneath the surface into clean sample bottles. Discrete depth samples are collected at some sites, using a Kemmerer water sampler attached to a pre-measured line using a weighted messenger. Field measurements are also taken at site using YSI EXO 2 Sondes. A suite of water samples consists of ~3 L total of water collected into nine clean sample bottles separated by analysis type. All clean sample bottles are triple rinsed in the field with the sample water before filling. Most parameters are collected into PET bottles while trace mercury samples are collected into duplicate clean borosilicate vials using the “clean hands” and “dirty hands” protocol and additionally stored inside a double layer of PE bags. Total metals are preserved in the field to pH < 2 using HNO₃. QA/QC samples include field duplicates in addition to field and travel blanks. After collection in the field, all water samples are kept cool at ~4’C and dark in coolers for transport until delivered to the Taiga Environmental Laboratory in Yellowknife, NT for analyses. Samples are analyzed for a standard suite of > 80 analyses including physical parameters (Specific Conductance, pH, Turbidity, total dissolved solids, total suspended solids), chlorophyll-a, as well as total and dissolved nutrients, metals, major ions, and trace mercury.

Attribution Licence (ODC-By) v1.0

You are free to share, copy, distribute, use, modify, transform, build upon, and produce works from the data as long as you attribute any public use of the data, or works produced from the data, in the manner specified in the licence. For any use or redistribution of the data, or works produced from it, you must make clear to others the licence of the data and keep intact any notices on the original data.

API Access

curl -G --data-urlencode "\\$filter=DOI eq '10.25976/3ogv-7n39'" -H "x-api-key: PRIVATE-API-KEY"



initial submission

Schema v2.19.1
Digest SHA3-256:417eb33aca128afed9fed2a81b919a0e819a1e72d242d17439226b09a259368e
File size 4.62 MB