The summer of 2024 marks the tenth year of DWGPD's voluntary cyanotoxin monitoring program for public drinking water systems. This program offers no-cost analysis of raw and finished water for microcystin (a potent liver toxin produced by some species of cyanobacteria) to surface water systems across the state. Samples are analyzed on a weekly basis from July to early November by the Vermont Agriculture and Environmental Laboratory (VAEL).
Thank you for your patience as we update this page and consolidate data for ease of access.
2023 Monitoring Results
Week One: July 10-11, 2023 Cyanotoxin Monitoring Results
Week Two: July 17-18, 2023 Cyanotoxin Monitoring Results
Week Three: July 24-25, 2023 Cyanotoxin Monitoring Results
Week Four: July 31-August 1, 2023 Cyanotoxin Monitoring Results
Week Five: August 7-8, 2023 Cyanotoxin Monitoring Results
Week Six: August 14-15, 2023 Cyanotoxin Monitoring Results
Week Seven: August 21-22, 2023 Cyanotoxin Monitoring Results
Week Eight: August 28-29, 2023 Cyanotoxin Monitoring Results
Week Nine: September 5, 2023 Cyanotoxin Monitoring Results
Week Ten: September 11-12, 2023 Cyanotoxin Monitoring Results
Week Eleven: September 18-19, 2023 Cyanotoxin Monitoring Results
Week Twelve: September 25-26, 2023 Cyanotoxin Monitoring Results
Week Thirteen: October 2-3 2023 Cyanotoxin Monitoring Results
Week Fourteen: October 9-10 2023 Cyanotoxin Monitoring Results
Week Fifteen: October 16-17 2023 Cyanotoxin Monitoring Results
Week Sixteen: October 23-24 2023 Cyanotoxin Monitoring Results
Week Seventeen: October 30-31 2023 Cyanotoxin Monitoring Results
Week Eighteen: November 6-7. 2023 Cyanotoxin Monitoring Results
2022 Monitoring Results
Week One: July 12, 2022 Cyanotoxin Monitoring Results
Week Two: July 19, 2022 Cyanotoxin Monitoring Results
Week Three: July 26, 2022 Cyanotoxin Monitoring Results
Week Four: August 2, 2022 Cyanotoxin Monitoring Results
Week Five: August 9, 2022 Cyanotoxin Monitoring Results
Week Six: August 15, 2022 Cyanotoxin Monitoring Results
Week Seven:August 23, 2022 Cyanotoxin Monitoring Results
Week Eight: August 30, 2022 Cyanotoxin Monitoring Results
Week Nine: September 6, 2022 Cyanotoxin Monitoring Results
Week Ten: September 13, 2022 Cyanotoxin Monitoring Resuls
Week Eleven: September 20, 2022 Cyanotoxin Monitoring Results
Week Twelve: September 27, 2022 Cyanotoxin Monitoring Results
2021 Monitoring Results
Week One: July 15, 2021 Cyanotoxin Monitoring Results
Week Two: July 23, 2021 Cyanotoxin Monitoring Results
Week Three: July 30, 2021 Cyanotoxin Monitoring Results
Week Four: August 6, 2021 Cyanotoxin Monitoring Results
Week Five: August 13, 2021 Cyanotoxin Monitoring Results
Week Six: August 20, 2021 Cyanotoxin Monitoring Results
Week Seven: August 27, 2021 Cyanotoxin Monitoring Results
Week Eight: September 3, 2021 Cyanotoxin Monitoring Results
Week Nine: September 10, 2021 Cyanotoxin Monitoring Results
Week Ten: September 17, 2021 Cyanotoxin Monitoring Results
Week Eleven: September 24, 2021 Cyanotoxin Monitoring Results
Week Twelve: October 1, 2021 Cyanotoxin Monitoring Results
2021 Alburgh Village Bloom Sampling: Between September 21 and October 18, 2021, microcystin was repeatedly detected in raw water samples at Alburgh Village Water System as a result of a cyanobacteria bloom near the drinking water intake. In this time, microcystin was never detected in treated drinking water. Sampling continued until two consecutive raw water samples showed microcystin below detection level.
2020 Monitoring Results
Week One: July 17, 2020 No Cyanotoxin Detections
Week Two: July 24, 2020 No Cyanotoxin Detections
Week Three: July 31, 2020 Cyanotoxin Monitoring Results
Week Four: August 7, 2020 Cyanotoxin Monitoring Results
Week Five: August 14, 2020 Cyanotoxin Monitoring Results
Week Six: August 21, 2020 Cyanotoxin Monitoring Results - Updated
Week Seven: August 28, 2020 Cyanotoxin Monitoring Results
Week Eight: September 4, 2020 Cyanotoxin Monitoring Results
Week Nine: September 14, 2020 Cyanotoxin Monitoring Results
Week Ten: September 18, 2020 Cyanotoxin Monitoring Results
Week Eleven: September 25, 2020 Cyanotoxin Monitoring Results
Week Twelve: October 2, 2020 Cyanotoxin Monitoring Results (Last Week)
Week Two: July 19, 2019 Cyanotoxin Monitoring Results
Week Three: July 26, 2019 Cyanotoxin Monitoring Results
Week Four: August 2, 2019 Cyanotoxin Monitoring Results
Week Five: August 9, 2019 Cyanotoxin Monitoring Results
Week Six: August 15, 2019 Cyanotoxin Monitoring Results
Week Seven: August 23, 2019 Cyanotoxin Monitoring Results
Week Eight: August 29, 2019 Cyanotoxin Monitoring Results
Week Nine: September 5, 2019 Cyanotoxin Monitoring Results
Week Ten: September 13, 2019 Cyanotoxin Monitoring Results
Week Eleven: September 19, 2019 Cyanotoxin Monitoring Results
Week Twelve: September 27, 2019 Cyanotoxin Monitoring Results (Final Week)
2018 Monitoring Results
Week One: July 13, 2018 Cyanotoxin Monitoring Results
Week Two: July 20, 2018 Cyanotoxin Monitoring Results
Week Three: July 27, 2018 Cyanotoxin Monitoring Results
Week Four: August 3, 2018 Cyanotoxin Monitoring Results
Week Five: August 10, 2018 Cyanotoxin Monitoring Results
Week Six: August 17, 2018 Cyanotoxin Monitoring Results
Week Seven: August 24, 2018 Cyanotoxin Monitoring Results
Week Eight: August 31, 2018 Cyanotoxin Monitoring Results
Week Nine: September 7, 2018 Cyanotoxin Monitoring Results
Week Ten: September 14, 2018 Cyanotoxin Monitoring Results
Week Eleven: September 21, 2018 Cyanotoxin Monitoring Results
Week Twelve: September 28, 2018 Cyanotoxin Monitoring Results (Final Week)
2017 Monitoring Results
Week One: July 14, 2017 Cyanotoxin Monitoring Results
Week Two: July 21, 2017 Cyanotoxin Monitoring Results
Week Three: July 28, 2017 Cyanotoxin Monitoring Results
Week Four: August 4, 2017 Cyanotoxin Monitoring Results
Week Five: August 11, 2017 Cyanotoxin Monitoring Results
Week Six: August 18, 2017 Cyanotoxin Monitoring Results
Week Seven: August 25, 2017 Cyanotoxin Monitoring Results (updated 9/8/17)
Week Eight: September 1, 2017 Cyanotoxin Monitoring Results (updated 9/8/17)
Week Nine: September 8, 2017 Cyanotoxin Monitoring Results
Week Ten: September 15, 2017 Cyanotoxin Monitoring Results
Week Eleven: September 22, 2017 Cyanotoxin Monitoring Results
Week Twelve: September 29, 2017 Cyanotoxin Monitoring Results (Final Week)
As part of this effort, Vermont water suppliers have attended cyanobacteria training developed for the summer volunteer monitors to learn how to visually assess their raw water source for the presence of cyanobacteria. All drinking water facilities on Lake Champlain receive weekly email updates on cyanobacteria populations through the summer cyanobacteria monitoring program. This program is a collaborative effort between VDH, DEC, and the Lake Champlain Committee (LCC). The VDH Cyanobacteria Tracker allows for bloom identification in Lake Champlain.
- Know What Grows in Our Lake: How to Identify Cyanobacteria - video from VDH
- Cyanobacteria Identification Training - video from LCC
- Lake Champlain Cyanobacteria Monitoring-Weekly Status Report (VDH)
