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 | 113 | 15 | 2 | 14 | 2017 | 2024 |
| Benton | Cylindrospermopsin | 17 | 0 | 0 | 6 | 2020 | 2023 |
| Benton | Microcystin | 35 | 1 | 1 | 10 | 2017 | 2024 |
| Benton | Saxitoxin | 14 | 0 | 0 | 6 | 2020 | 2023 |
| Chelan | Anatoxin-a | 17 | 1 | 1 | 3 | 2014 | 2024 |
| Chelan | Cylindrospermopsin | 9 | 0 | 0 | 2 | 2018 | 2024 |
| Chelan | Microcystin | 23 | 6 | 1 | 3 | 2014 | 2024 |
| Chelan | Saxitoxin | 9 | 0 | 0 | 2 | 2018 | 2024 |
| 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 | 357 | 12 | 5 | 11 | 2009 | 2024 |
| Clark | Cylindrospermopsin | 39 | 0 | 0 | 9 | 2014 | 2024 |
| Clark | Microcystin | 380 | 87 | 3 | 11 | 2007 | 2024 |
| Clark | Saxitoxin | 39 | 0 | 0 | 9 | 2014 | 2024 |
| Columbia | Anatoxin-a | 5 | 0 | 0 | 2 | 2012 | 2023 |
| 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 | 56 | 0 | 0 | 5 | 2009 | 2024 |
| Cowlitz | Cylindrospermopsin | 34 | 0 | 0 | 5 | 2016 | 2024 |
| Cowlitz | Microcystin | 77 | 0 | 0 | 6 | 2008 | 2024 |
| Cowlitz | Saxitoxin | 18 | 0 | 0 | 4 | 2019 | 2024 |
| Douglas | Anatoxin-a | 194 | 87 | 1 | 5 | 2009 | 2024 |
| Douglas | Cylindrospermopsin | 3 | 0 | 0 | 3 | 2022 | 2024 |
| Douglas | Microcystin | 198 | 1 | 1 | 5 | 2007 | 2024 |
| Douglas | Saxitoxin | 4 | 0 | 0 | 3 | 2022 | 2024 |
| Ferry | Anatoxin-a | 5 | 1 | 1 | 2 | 2013 | 2023 |
| Ferry | Cylindrospermopsin | 3 | 0 | 0 | 1 | 2020 | 2023 |
| Ferry | Microcystin | 5 | 0 | 0 | 2 | 2013 | 2023 |
| Ferry | Saxitoxin | 3 | 0 | 0 | 1 | 2020 | 2023 |
| Franklin | Anatoxin-a | 93 | 1 | 1 | 14 | 2015 | 2024 |
| Franklin | Cylindrospermopsin | 8 | 0 | 0 | 5 | 2020 | 2023 |
| Franklin | Microcystin | 97 | 32 | 3 | 9 | 2015 | 2024 |
| Franklin | Saxitoxin | 8 | 0 | 0 | 5 | 2020 | 2023 |
| Garfield | Anatoxin-a | 2 | 0 | 0 | 1 | 2021 | 2021 |
| Garfield | Cylindrospermopsin | 2 | 0 | 0 | 1 | 2021 | 2021 |
| Garfield | Microcystin | 2 | 0 | 0 | 1 | 2021 | 2021 |
| Grant | Anatoxin-a | 36 | 0 | 0 | 12 | 2017 | 2023 |
| Grant | Cylindrospermopsin | 17 | 0 | 0 | 7 | 2018 | 2023 |
| Grant | Microcystin | 311 | 96 | 13 | 24 | 2007 | 2024 |
| Grant | Saxitoxin | 17 | 0 | 0 | 7 | 2018 | 2023 |
| Grays Harbor | Anatoxin-a | 23 | 0 | 0 | 5 | 2009 | 2024 |
| Grays Harbor | Cylindrospermopsin | 7 | 0 | 0 | 4 | 2019 | 2024 |
| Grays Harbor | Microcystin | 41 | 8 | 2 | 6 | 2008 | 2024 |
| Grays Harbor | Saxitoxin | 7 | 0 | 0 | 4 | 2019 | 2024 |
| Island | Anatoxin-a | 147 | 42 | 3 | 8 | 2009 | 2024 |
| Island | Cylindrospermopsin | 24 | 0 | 0 | 4 | 2013 | 2023 |
| Island | Microcystin | 170 | 38 | 3 | 9 | 2007 | 2024 |
| Island | Saxitoxin | 25 | 0 | 0 | 4 | 2012 | 2023 |
| Jefferson | Anatoxin-a | 563 | 102 | 2 | 14 | 2009 | 2025 |
| Jefferson | Cylindrospermopsin | 18 | 0 | 0 | 5 | 2018 | 2024 |
| Jefferson | Microcystin | 657 | 31 | 4 | 16 | 2007 | 2025 |
| Jefferson | Saxitoxin | 18 | 0 | 0 | 5 | 2018 | 2024 |
| King | Anatoxin-a | 6702 | 18 | 7 | 98 | 2009 | 2025 |
| King | Cylindrospermopsin | 121 | 0 | 0 | 53 | 2009 | 2024 |
| King | Microcystin | 9276 | 288 | 35 | 102 | 2007 | 2025 |
| King | Saxitoxin | 138 | 0 | 0 | 56 | 2009 | 2024 |
| 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 | 27 | 0 | 0 | 8 | 2012 | 2024 |
| Kittitas | Cylindrospermopsin | 10 | 0 | 0 | 7 | 2018 | 2023 |
| Kittitas | Microcystin | 29 | 5 | 1 | 8 | 2012 | 2024 |
| Kittitas | Saxitoxin | 11 | 0 | 0 | 7 | 2018 | 2023 |
| Klickitat | Anatoxin-a | 62 | 3 | 2 | 8 | 2009 | 2024 |
| Klickitat | Cylindrospermopsin | 11 | 0 | 0 | 4 | 2018 | 2023 |
| Klickitat | Microcystin | 71 | 15 | 3 | 8 | 2009 | 2024 |
| 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 | 30 | 0 | 0 | 14 | 2012 | 2023 |
| Mason | Cylindrospermopsin | 8 | 0 | 0 | 7 | 2018 | 2023 |
| Mason | Microcystin | 36 | 0 | 0 | 14 | 2007 | 2023 |
| Mason | Saxitoxin | 8 | 0 | 0 | 7 | 2018 | 2023 |
| Okanogan | Anatoxin-a | 10 | 1 | 1 | 5 | 2011 | 2022 |
| Okanogan | Cylindrospermopsin | 5 | 0 | 0 | 3 | 2014 | 2022 |
| Okanogan | Microcystin | 15 | 1 | 1 | 6 | 2007 | 2022 |
| Okanogan | Saxitoxin | 5 | 0 | 0 | 3 | 2014 | 2022 |
| Pacific | Anatoxin-a | 8 | 0 | 0 | 3 | 2015 | 2024 |
| Pacific | Cylindrospermopsin | 5 | 0 | 0 | 2 | 2019 | 2024 |
| Pacific | Microcystin | 8 | 3 | 1 | 3 | 2015 | 2024 |
| Pacific | Saxitoxin | 5 | 0 | 0 | 2 | 2019 | 2024 |
| 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 | 791 | 32 | 5 | 33 | 2009 | 2025 |
| Pierce | Cylindrospermopsin | 74 | 0 | 0 | 18 | 2009 | 2025 |
| Pierce | Microcystin | 1170 | 389 | 18 | 37 | 2007 | 2025 |
| Pierce | Saxitoxin | 112 | 1 | 1 | 22 | 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 | 198 | 20 | 2 | 14 | 2010 | 2025 |
| Skagit | Cylindrospermopsin | 20 | 0 | 0 | 12 | 2012 | 2024 |
| Skagit | Microcystin | 224 | 61 | 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 | 546 | 0 | 0 | 36 | 2009 | 2024 |
| Snohomish | Cylindrospermopsin | 95 | 0 | 0 | 28 | 2009 | 2024 |
| Snohomish | Microcystin | 656 | 108 | 12 | 37 | 2007 | 2024 |
| Snohomish | Saxitoxin | 100 | 0 | 0 | 28 | 2009 | 2024 |
| Spokane | Anatoxin-a | 70 | 4 | 1 | 16 | 2009 | 2024 |
| Spokane | Cylindrospermopsin | 24 | 0 | 0 | 11 | 2016 | 2024 |
| Spokane | Microcystin | 95 | 23 | 6 | 17 | 2008 | 2024 |
| Spokane | Saxitoxin | 26 | 0 | 0 | 10 | 2010 | 2024 |
| Stevens | Anatoxin-a | 19 | 0 | 0 | 7 | 2012 | 2024 |
| Stevens | Cylindrospermopsin | 12 | 0 | 0 | 6 | 2012 | 2024 |
| Stevens | Microcystin | 26 | 8 | 1 | 7 | 2009 | 2024 |
| Stevens | Saxitoxin | 12 | 0 | 0 | 6 | 2012 | 2024 |
| Thurston | Anatoxin-a | 600 | 25 | 5 | 23 | 2009 | 2024 |
| Thurston | Cylindrospermopsin | 121 | 0 | 0 | 18 | 2012 | 2024 |
| Thurston | Microcystin | 765 | 124 | 9 | 23 | 2008 | 2025 |
| Thurston | Saxitoxin | 165 | 0 | 0 | 18 | 2012 | 2024 |
| 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 | 63 | 3 | 1 | 7 | 2015 | 2024 |
| Walla Walla | Cylindrospermopsin | 10 | 0 | 0 | 5 | 2019 | 2022 |
| Walla Walla | Microcystin | 67 | 18 | 3 | 8 | 2008 | 2024 |
| Walla Walla | Saxitoxin | 11 | 0 | 0 | 5 | 2019 | 2022 |
| Whatcom | Anatoxin-a | 116 | 6 | 1 | 15 | 2010 | 2024 |
| Whatcom | Cylindrospermopsin | 19 | 0 | 0 | 11 | 2018 | 2024 |
| Whatcom | Microcystin | 126 | 33 | 4 | 15 | 2010 | 2025 |
| Whatcom | Saxitoxin | 22 | 0 | 0 | 11 | 2010 | 2024 |
| Whitman | Anatoxin-a | 51 | 1 | 1 | 5 | 2014 | 2024 |
| Whitman | Cylindrospermopsin | 13 | 0 | 0 | 5 | 2014 | 2024 |
| Whitman | Microcystin | 51 | 23 | 2 | 5 | 2014 | 2024 |
| Whitman | Saxitoxin | 15 | 0 | 0 | 4 | 2014 | 2024 |
| Yakima | Anatoxin-a | 22 | 1 | 1 | 11 | 2014 | 2024 |
| Yakima | Cylindrospermopsin | 11 | 0 | 0 | 10 | 2023 | 2024 |
| Yakima | Microcystin | 23 | 6 | 1 | 11 | 2014 | 2024 |
| Yakima | Saxitoxin | 12 | 0 | 0 | 10 | 2023 | 2024 |