Lake Winnipeg Community-Based Monitoring Network

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The Lake Winnipeg Community-Based Monitoring Network (LWCBMN) is a growing network that engages citizen volunteers to collect water samples across Manitoba using scientifically vetted protocols. Samples are then analyzed in a lab to measure phosphorus concentration and calculate the amount of phosphorus begin exported off our landscapes.

While Lake Winnipeg receives its water from a vast watershed, not all areas of the watershed contribute equal amounts of phosphorus. By sampling frequently at many sites, LWCBMN is able to pinpoint phosphorus hotspots – areas that contribute a disproportionate amount of phosphorus to Lake Winnipeg.

Snow melts, floods and heavy rainfall events are responsible for most of the phosphorus that is flushed from the land into our waterways. Special care is taken by network staff and volunteers to ensure phosphorus runoff is captured during these high-water events. And, because these volunteers live, work or commute near their sampling sites, LWCBMN can quickly mobilize citizen scientists to collect samples when it matters most.

Version 3.0.0
Data Steward Email
Data Collection Organization Lake Winnipeg Foundation
Data Upload Organization Lake Winnipeg Foundation
Progress Code onGoing
Maintenance Frequency Code unknown
Topic Category Code inlandWaters
Keywords discharge, Lake Winnipeg, phosphorus, Water quality
Spatial Extent -101.384° 49°, -94.869° 51.587° (W S, E N)
Temporal Extent 2015-06-29 to 2020-01-15
Date Published
Alternate Formats FGP-HNAP ISO:19115-2 (XML) , W3C DCAT (XML) , W3C DCAT (JSON-LD)


Lake Winnipeg Foundation. 2022-04-30. "Lake Winnipeg Community-Based Monitoring Network" (dataset). 3.0.0. DataStream.

Data Collection Information

Water samples are collected using a sampling device (weighted plastic tube and three metre leader) that collects source water directly into the collection bottle (500 mL Nalgene polyethylene bottle). The collection bottle is lowered into the water just before it hits the bottom, the bottle is filled, then brought back to the surface. It is rinsed three times, prior to sample collection. To collect the water sample, the sampler is lowered close to the bottom, then raised to the top of the water while the bottle is filling. From the collection bottle, a 60 mL Nalgene polyethylene bottle is filled with whole water containing 1 mL 4N H2SO4. Next, 20 mL is drawn into a syringe, and filtered through a 45 um filter into a 25 mL scintillation vial containing 0.1 mL of 4N H2SO4. Whole water is analyzed for total phosphorus, and filtered water for dissolved phosphorus. Suspended phosphorus can be found by subtracting dissolved phosphorus from the total.
The discharge data is collected by the Water Survey of Canada (WSC). Water level stations are setup across Canada that log water levels every 5 minutes. These water levels can be related to discharge via a mathematical relationship established at each site using manual flow measurements. LWF calculates daily discharge averages based on the WSC data.

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/hxqe-py39'" -H "x-api-key: PRIVATE-API-KEY"



DataStream system update: set citation to recommended default.


Added 2019 discharge data.

Schema v1.7.0
Blockchain Transaction 0xf8ce5422c8b50077f7465398a4db9580e0399bb56fe910713f33fbb4c9ca1932
Blockchain Signed
Blockchain Verified
Digest SHA2-256:fd55ef400063c966d2a875d315a0d1a536fb1743766a5d343061e9e1ac62febf
File size 14.54 MB


Complete dataset collected during the field seasons.

Schema v1.7.0
Blockchain Transaction 0x93f544ebf94010630741933b841db45eb114f47e94e2c492217c0af14721ae42
Blockchain Signed
Blockchain Verified
Digest SHA2-256:c9a094d6f5f210ab29ebe05df316819a8af3a343041cf9639fb07e3807869559
File size 8.33 MB


New phosphorus data collected in the 2019 field season.

Schema v1.7.0
Blockchain Transaction 0xf13c0df7f620deb66daef0d491fceac8c064293fd8713e2d8e5e878cb44327c5
Blockchain Signed
Blockchain Verified
Digest SHA2-256:b6cca159f72597849ae01fb624b4f5621a009f6d99142c2bc8e11ab9bc61bc2d
File size 8.26 MB


Initial Submission

Schema v1.7.0
Blockchain Transaction 0x03a78403121ade67ca878cdbd8359e1641934e8ee8ffc4990cf9e6ef76107c7a
Blockchain Signed
Blockchain Verified
Digest SHA2-256:c7f610cc287189f83445023535ec7fb907d78fbe9a1125ae81e4fad2f809c632
File size 7.54 MB