County Summaries
Here is a table showing toxins in lakes by counties. You can custom sort the table by selecting the collumn header.
| County | Parameter | Number of
Samples | Number of
Exceedings | Number of
Lakes Exceeded | Number of
Lakes Sampled | From
Year | To
Year |
| Adams | Anatoxin-a | 1 | 0 | 0 | 1 | 2021 | 2021 |
| Adams | Cylindrospermopsin | 1 | 0 | 0 | 1 | 2021 | 2021 |
| Adams | Microcystin | 1 | 0 | 0 | 1 | 2021 | 2021 |
| Adams | Saxitoxin | 1 | 0 | 0 | 1 | 2021 | 2021 |
| Benton | Anatoxin-a | 121 | 19 | 2 | 14 | 2017 | 2025 |
| Benton | Cylindrospermopsin | 17 | 0 | 0 | 6 | 2020 | 2023 |
| Benton | Microcystin | 38 | 1 | 1 | 11 | 2017 | 2025 |
| Benton | Saxitoxin | 14 | 0 | 0 | 6 | 2020 | 2023 |
| Chelan | Anatoxin-a | 20 | 1 | 1 | 3 | 2014 | 2025 |
| Chelan | Cylindrospermopsin | 10 | 0 | 0 | 2 | 2018 | 2025 |
| Chelan | Microcystin | 26 | 7 | 1 | 3 | 2014 | 2025 |
| Chelan | Saxitoxin | 10 | 0 | 0 | 2 | 2018 | 2025 |
| Clallam | Anatoxin-a | 10 | 0 | 0 | 3 | 2013 | 2019 |
| Clallam | Cylindrospermopsin | 4 | 0 | 0 | 2 | 2018 | 2019 |
| Clallam | Microcystin | 11 | 1 | 1 | 4 | 2009 | 2019 |
| Clallam | Saxitoxin | 4 | 0 | 0 | 2 | 2018 | 2019 |
| Clark | Anatoxin-a | 405 | 19 | 5 | 11 | 2009 | 2025 |
| Clark | Cylindrospermopsin | 41 | 0 | 0 | 9 | 2014 | 2025 |
| Clark | Microcystin | 428 | 99 | 3 | 11 | 2007 | 2025 |
| Clark | Saxitoxin | 41 | 0 | 0 | 9 | 2014 | 2025 |
| Columbia | Anatoxin-a | 6 | 0 | 0 | 2 | 2012 | 2025 |
| Columbia | Cylindrospermopsin | 1 | 0 | 0 | 1 | 2021 | 2021 |
| Columbia | Microcystin | 6 | 1 | 1 | 2 | 2012 | 2023 |
| Columbia | Saxitoxin | 1 | 0 | 0 | 1 | 2021 | 2021 |
| Cowlitz | Anatoxin-a | 62 | 0 | 0 | 8 | 2009 | 2025 |
| Cowlitz | Cylindrospermopsin | 39 | 0 | 0 | 8 | 2016 | 2025 |
| Cowlitz | Microcystin | 83 | 0 | 0 | 8 | 2008 | 2025 |
| Cowlitz | Saxitoxin | 23 | 0 | 0 | 7 | 2019 | 2025 |
| Douglas | Anatoxin-a | 197 | 87 | 1 | 5 | 2009 | 2025 |
| Douglas | Cylindrospermopsin | 3 | 0 | 0 | 3 | 2022 | 2024 |
| Douglas | Microcystin | 201 | 1 | 1 | 5 | 2007 | 2025 |
| Douglas | Saxitoxin | 4 | 0 | 0 | 3 | 2022 | 2024 |
| Ferry | Anatoxin-a | 6 | 1 | 1 | 2 | 2013 | 2025 |
| Ferry | Cylindrospermopsin | 4 | 0 | 0 | 1 | 2020 | 2025 |
| Ferry | Microcystin | 6 | 0 | 0 | 2 | 2013 | 2025 |
| Ferry | Saxitoxin | 4 | 0 | 0 | 1 | 2020 | 2025 |
| Franklin | Anatoxin-a | 98 | 1 | 1 | 14 | 2015 | 2025 |
| Franklin | Cylindrospermopsin | 9 | 0 | 0 | 5 | 2020 | 2025 |
| Franklin | Microcystin | 106 | 33 | 4 | 9 | 2015 | 2025 |
| Franklin | Saxitoxin | 9 | 0 | 0 | 5 | 2020 | 2025 |
| Garfield | Anatoxin-a | 4 | 0 | 0 | 3 | 2021 | 2025 |
| Garfield | Cylindrospermopsin | 2 | 0 | 0 | 1 | 2021 | 2021 |
| Garfield | Microcystin | 4 | 0 | 0 | 3 | 2021 | 2025 |
| Grant | Anatoxin-a | 36 | 0 | 0 | 12 | 2017 | 2023 |
| Grant | Cylindrospermopsin | 17 | 0 | 0 | 7 | 2018 | 2023 |
| Grant | Microcystin | 316 | 98 | 13 | 24 | 2007 | 2025 |
| Grant | Saxitoxin | 17 | 0 | 0 | 7 | 2018 | 2023 |
| Grays Harbor | Anatoxin-a | 26 | 0 | 0 | 6 | 2009 | 2025 |
| Grays Harbor | Cylindrospermopsin | 7 | 0 | 0 | 4 | 2019 | 2024 |
| Grays Harbor | Microcystin | 44 | 8 | 2 | 7 | 2008 | 2025 |
| Grays Harbor | Saxitoxin | 7 | 0 | 0 | 4 | 2019 | 2024 |
| Island | Anatoxin-a | 154 | 43 | 3 | 8 | 2009 | 2025 |
| Island | Cylindrospermopsin | 24 | 0 | 0 | 4 | 2013 | 2023 |
| Island | Microcystin | 177 | 38 | 3 | 9 | 2007 | 2025 |
| Island | Saxitoxin | 25 | 0 | 0 | 4 | 2012 | 2023 |
| Jefferson | Anatoxin-a | 574 | 103 | 2 | 14 | 2009 | 2025 |
| Jefferson | Cylindrospermopsin | 19 | 0 | 0 | 5 | 2018 | 2025 |
| Jefferson | Microcystin | 668 | 32 | 5 | 16 | 2007 | 2025 |
| Jefferson | Saxitoxin | 19 | 0 | 0 | 5 | 2018 | 2025 |
| King | Anatoxin-a | 7270 | 18 | 7 | 103 | 2009 | 2025 |
| King | Cylindrospermopsin | 124 | 0 | 0 | 54 | 2009 | 2025 |
| King | Microcystin | 9846 | 304 | 35 | 107 | 2007 | 2025 |
| King | Saxitoxin | 141 | 0 | 0 | 57 | 2009 | 2025 |
| Kitsap | Anatoxin-a | 84 | 4 | 2 | 10 | 2009 | 2024 |
| Kitsap | Cylindrospermopsin | 14 | 0 | 0 | 7 | 2013 | 2024 |
| Kitsap | Microcystin | 174 | 29 | 4 | 14 | 2007 | 2024 |
| Kitsap | Saxitoxin | 18 | 0 | 0 | 9 | 2012 | 2024 |
| Kittias | Anatoxin-a | 1 | 0 | 0 | 1 | 2024 | 2024 |
| Kittias | Cylindrospermopsin | 1 | 0 | 0 | 1 | 2024 | 2024 |
| Kittias | Microcystin | 1 | 0 | 0 | 1 | 2024 | 2024 |
| Kittias | Saxitoxin | 1 | 0 | 0 | 1 | 2024 | 2024 |
| Kittitas | Anatoxin-a | 28 | 0 | 0 | 8 | 2012 | 2025 |
| Kittitas | Cylindrospermopsin | 10 | 0 | 0 | 7 | 2018 | 2023 |
| Kittitas | Microcystin | 30 | 5 | 1 | 8 | 2012 | 2025 |
| Kittitas | Saxitoxin | 11 | 0 | 0 | 7 | 2018 | 2023 |
| Klickitat | Anatoxin-a | 78 | 4 | 3 | 8 | 2009 | 2025 |
| Klickitat | Cylindrospermopsin | 11 | 0 | 0 | 4 | 2018 | 2023 |
| Klickitat | Microcystin | 88 | 20 | 3 | 8 | 2009 | 2025 |
| Klickitat | Saxitoxin | 12 | 0 | 0 | 4 | 2018 | 2024 |
| Lewis | Anatoxin-a | 6 | 0 | 0 | 3 | 2009 | 2022 |
| Lewis | Cylindrospermopsin | 3 | 0 | 0 | 2 | 2020 | 2022 |
| Lewis | Microcystin | 13 | 0 | 0 | 4 | 2007 | 2022 |
| Lewis | Saxitoxin | 3 | 0 | 0 | 2 | 2020 | 2022 |
| Lincoln | Anatoxin-a | 3 | 0 | 0 | 2 | 2015 | 2017 |
| Lincoln | Microcystin | 5 | 1 | 1 | 3 | 2011 | 2023 |
| Mason | Anatoxin-a | 35 | 0 | 0 | 14 | 2012 | 2025 |
| Mason | Cylindrospermopsin | 10 | 0 | 0 | 8 | 2018 | 2025 |
| Mason | Microcystin | 41 | 0 | 0 | 14 | 2007 | 2025 |
| Mason | Saxitoxin | 10 | 0 | 0 | 8 | 2018 | 2025 |
| Okanogan | Anatoxin-a | 13 | 1 | 1 | 5 | 2011 | 2025 |
| Okanogan | Cylindrospermopsin | 5 | 0 | 0 | 3 | 2014 | 2022 |
| Okanogan | Microcystin | 18 | 1 | 1 | 6 | 2007 | 2025 |
| Okanogan | Saxitoxin | 5 | 0 | 0 | 3 | 2014 | 2022 |
| Pacific | Anatoxin-a | 10 | 0 | 0 | 3 | 2015 | 2025 |
| Pacific | Cylindrospermopsin | 7 | 0 | 0 | 2 | 2019 | 2025 |
| Pacific | Microcystin | 11 | 4 | 1 | 3 | 2015 | 2025 |
| Pacific | Saxitoxin | 7 | 0 | 0 | 2 | 2019 | 2025 |
| Pend Oreille | Anatoxin-a | 4 | 0 | 0 | 4 | 2012 | 2023 |
| Pend Oreille | Cylindrospermopsin | 3 | 0 | 0 | 3 | 2023 | 2023 |
| Pend Oreille | Microcystin | 4 | 0 | 0 | 4 | 2012 | 2023 |
| Pend Oreille | Saxitoxin | 3 | 0 | 0 | 3 | 2023 | 2023 |
| Pierce | Anatoxin-a | 815 | 32 | 5 | 34 | 2009 | 2025 |
| Pierce | Cylindrospermopsin | 75 | 0 | 0 | 18 | 2009 | 2025 |
| Pierce | Microcystin | 1198 | 405 | 18 | 38 | 2007 | 2025 |
| Pierce | Saxitoxin | 120 | 1 | 1 | 23 | 2009 | 2025 |
| San Juan | Anatoxin-a | 9 | 0 | 0 | 2 | 2019 | 2022 |
| San Juan | Cylindrospermopsin | 4 | 0 | 0 | 2 | 2019 | 2022 |
| San Juan | Microcystin | 14 | 3 | 1 | 3 | 2019 | 2023 |
| San Juan | Saxitoxin | 4 | 0 | 0 | 2 | 2019 | 2022 |
| Skagit | Anatoxin-a | 221 | 26 | 2 | 14 | 2010 | 2025 |
| Skagit | Cylindrospermopsin | 20 | 0 | 0 | 12 | 2012 | 2024 |
| Skagit | Microcystin | 247 | 67 | 3 | 15 | 2010 | 2025 |
| Skagit | Saxitoxin | 22 | 0 | 0 | 13 | 2012 | 2024 |
| Skamania | Anatoxin-a | 5 | 0 | 0 | 4 | 2017 | 2024 |
| Skamania | Cylindrospermopsin | 3 | 0 | 0 | 3 | 2019 | 2024 |
| Skamania | Microcystin | 5 | 0 | 0 | 4 | 2017 | 2024 |
| Skamania | Saxitoxin | 3 | 0 | 0 | 3 | 2019 | 2024 |
| Snohomish | Anatoxin-a | 563 | 0 | 0 | 37 | 2009 | 2025 |
| Snohomish | Cylindrospermopsin | 103 | 0 | 0 | 29 | 2009 | 2025 |
| Snohomish | Microcystin | 675 | 108 | 12 | 38 | 2007 | 2025 |
| Snohomish | Saxitoxin | 108 | 0 | 0 | 29 | 2009 | 2025 |
| Spokane | Anatoxin-a | 72 | 4 | 1 | 16 | 2009 | 2025 |
| Spokane | Cylindrospermopsin | 26 | 0 | 0 | 11 | 2016 | 2025 |
| Spokane | Microcystin | 97 | 23 | 6 | 17 | 2008 | 2025 |
| Spokane | Saxitoxin | 28 | 0 | 0 | 11 | 2010 | 2025 |
| Stevens | Anatoxin-a | 22 | 0 | 0 | 8 | 2012 | 2025 |
| Stevens | Cylindrospermopsin | 14 | 0 | 0 | 7 | 2012 | 2025 |
| Stevens | Microcystin | 29 | 8 | 1 | 8 | 2009 | 2025 |
| Stevens | Saxitoxin | 14 | 0 | 0 | 7 | 2012 | 2025 |
| Thurston | Anatoxin-a | 638 | 25 | 5 | 24 | 2009 | 2025 |
| Thurston | Cylindrospermopsin | 129 | 0 | 0 | 18 | 2012 | 2025 |
| Thurston | Microcystin | 816 | 133 | 10 | 24 | 2008 | 2025 |
| Thurston | Saxitoxin | 173 | 0 | 0 | 18 | 2012 | 2025 |
| Thurston County | Anatoxin-a | 6 | 0 | 0 | 1 | 2016 | 2024 |
| Thurston County | Cylindrospermopsin | 5 | 0 | 0 | 1 | 2016 | 2024 |
| Thurston County | Microcystin | 6 | 0 | 0 | 1 | 2016 | 2024 |
| Thurston County | Saxitoxin | 5 | 0 | 0 | 1 | 2016 | 2024 |
| Walla Walla | Anatoxin-a | 90 | 5 | 2 | 10 | 2015 | 2025 |
| Walla Walla | Cylindrospermopsin | 10 | 0 | 0 | 5 | 2019 | 2022 |
| Walla Walla | Microcystin | 94 | 22 | 3 | 11 | 2008 | 2025 |
| Walla Walla | Saxitoxin | 11 | 0 | 0 | 5 | 2019 | 2022 |
| Whatcom | Anatoxin-a | 124 | 6 | 1 | 15 | 2010 | 2025 |
| Whatcom | Cylindrospermopsin | 19 | 0 | 0 | 11 | 2018 | 2024 |
| Whatcom | Microcystin | 134 | 33 | 4 | 15 | 2010 | 2025 |
| Whatcom | Saxitoxin | 22 | 0 | 0 | 11 | 2010 | 2024 |
| Whitman | Anatoxin-a | 66 | 1 | 1 | 5 | 2014 | 2025 |
| Whitman | Cylindrospermopsin | 13 | 0 | 0 | 5 | 2014 | 2024 |
| Whitman | Microcystin | 66 | 31 | 2 | 5 | 2014 | 2025 |
| Whitman | Saxitoxin | 17 | 0 | 0 | 5 | 2014 | 2025 |
| Yakima | Anatoxin-a | 37 | 2 | 1 | 13 | 2014 | 2025 |
| Yakima | Cylindrospermopsin | 14 | 0 | 0 | 10 | 2023 | 2025 |
| Yakima | Microcystin | 38 | 9 | 2 | 13 | 2014 | 2025 |
| Yakima | Saxitoxin | 15 | 0 | 0 | 10 | 2023 | 2025 |