Detailed search for your lake
This database contains the most current toxicity data available. All instances of values above the recreational guidelines are kept
as up to date as possible, but values below the guidelines may be somewhat delayed in entry.Since there is a lag time from the
date of sample to the date of analysis, be sure to check the sample date when looking at data or before
you use the lake. Remember to use caution and avoid scums. "When in doubt, stay out!"
Your local jurisdiction may have more specific information about your lake. Questions? Contact
toxicalgae at Department of Ecology.
If a lake is not listed, it has not been tested for toxic algae through the Ecology program.
The pins on the map represent the center of small lakes, regardless of where the sample was taken. To find
more precise location information, download the toxin data and click the "view scum info" link. That is where
specific sampling location information will be if it was provided. On larger lakes, (such as Lake Washington,
Moses Lake and Potholes) pins represent the location of the sample if provided.
Toxin:
County WRIA Number Site Collect Date Parameter Toxin Conc. (µg/L) MDL (µg/L) Above State Guideline Additional Information Sample Location Ecology Tracking Number
Skagit 3 Pass Lake 09/03/2024 Anatoxin-a 66.600 0.010 Yes No Boat Ramp PASSSKAG174_24_256
Skagit 3 Pass Lake 09/03/2024 Microcystin 2.200 0.150 No No Boat Ramp PASSSKAG174_24_256
Skagit 3 Pass Lake 08/19/2024 Anatoxin-a 670.000 0.010 Yes No Boat Ramp PASSSKAG174_24_191
Skagit 3 Pass Lake 08/19/2024 Microcystin 2.200 0.150 No No Boat Ramp PASSSKAG174_24_191
Skagit 3 Pass Lake 08/05/2024 Anatoxin-a 0.323 0.010 No No Boat Ramp PASSSKAG174_24_128
Skagit 3 Pass Lake 08/05/2024 Microcystin <MDL 0.300 No No Boat Ramp PASSSKAG174_24_128
Skagit 3 Pass Lake 07/25/2024 Anatoxin-a 0.026 0.010 No No Pass Lake Boat Launch PASSSKAG174_24_106
Skagit 3 Pass Lake 07/25/2024 Microcystin <MDL 0.300 No No Pass Lake Boat Launch PASSSKAG174_24_106
Skagit 3 Pass Lake 07/11/2024 Anatoxin-a 0.072 0.010 No No Pass Lake Boat Launch PASSSKAG174_24_068
Skagit 3 Pass Lake 07/11/2024 Microcystin <MDL 0.300 No No Pass Lake Boat Launch PASSSKAG174_24_068
Skagit 3 Pass Lake 05/28/2024 Anatoxin-a <MDL 0.010 No No Pass Lake Boat Launch PASSSKAG174_24_016
Skagit 3 Pass Lake 05/28/2024 Microcystin <MDL 0.300 No No Pass Lake Boat Launch PASSSKAG174_24_016
Skagit 3 Pass Lake 05/02/2024 Anatoxin-a <MDL 0.010 No No Pass Lake Boat Launch PASSSKAG174_24_007
Skagit 3 Pass Lake 05/02/2024 Microcystin <MDL 0.300 No No Pass Lake Boat Launch PASSSKAG174_24_007
Skagit 3 Pass Lake 10/30/2023 Anatoxin-a 0.172 0.165 No No Pass Lake Boat Launch PASSSKAG174_23_419
Skagit 3 Pass Lake 10/30/2023 Microcystin 167.000 0.150 Yes No Pass Lake Boat Launch PASSSKAG174_23_419
Skagit 3 Pass Lake 10/09/2023 Anatoxin-a 0.026 0.010 No No Boat Ramp PASSSKAG174_23_358
Skagit 3 Pass Lake 10/09/2023 Microcystin 203.000 0.150 Yes No Boat Ramp PASSSKAG174_23_358
Skagit 3 Pass Lake 10/02/2023 Anatoxin-a 0.021 0.010 No No Boat Ramp PASSSKAG174_23_333
Skagit 3 Pass Lake 10/02/2023 Microcystin 10.000 0.150 Yes No Boat Ramp PASSSKAG174_23_333
Skagit 3 Pass Lake 09/25/2023 Microcystin 10.000 0.150 Yes No Boat Ramp PASSSKAG174_23_313
Skagit 3 Pass Lake 09/11/2023 Anatoxin-a 0.452 0.010 No No Pass Lake Boat Launch PASSSKAG174_23_258
Skagit 3 Pass Lake 09/11/2023 Microcystin 2.460 0.300 No No Pass Lake Boat Launch PASSSKAG174_23_258
Skagit 3 Pass Lake 08/21/2023 Anatoxin-a 0.128 0.010 No No Pass Lake Boat Launch PASSSKAG174_23_194
Skagit 3 Pass Lake 08/21/2023 Microcystin 0.475 0.150 No No Pass Lake Boat Launch PASSSKAG174_23_194
Skagit 3 Pass Lake 08/07/2023 Anatoxin-a 0.181 0.010 No View Boat Ramp PASSSKAG174_23_150
Skagit 3 Pass Lake 08/07/2023 Microcystin 9.500 0.150 Yes View Boat Ramp PASSSKAG174_23_150
Skagit 3 Pass Lake 12/12/2022 Anatoxin-a 0.028 0.010 No View PASSSKAG174
Skagit 3 Pass Lake 12/12/2022 Microcystin <MDL 0.150 No View PASSSKAG174
Skagit 3 Pass Lake 11/21/2022 Anatoxin-a <MDL 0.010 No View Boat Ramp PASSSKAG174_22_470
Skagit 3 Pass Lake 11/21/2022 Microcystin 437.000 0.150 Yes View Boat Ramp PASSSKAG174_22_470
Skagit 3 Pass Lake 11/07/2022 Anatoxin-a 0.025 0.010 No View Boat Ramp PASSSKAG174_22_457
Skagit 3 Pass Lake 11/07/2022 Microcystin 31.500 0.150 Yes View Boat Ramp PASSSKAG174_22_457
Skagit 3 Pass Lake 10/17/2022 Anatoxin-a 0.012 0.010 No View Boat Ramp PASSSKAG174_22_401
Skagit 3 Pass Lake 10/17/2022 Microcystin 400.000 0.150 Yes View Boat Ramp PASSSKAG174_22_401
Skagit 3 Pass Lake 10/03/2022 Anatoxin-a 0.035 0.010 No View Boat Ramp PASSSKAG174_22_354
Skagit 3 Pass Lake 10/03/2022 Microcystin 87.500 0.150 Yes View Boat Ramp PASSSKAG174_22_354
Skagit 3 Pass Lake 09/06/2022 Anatoxin-a <MDL 0.165 No View West end of lake near boat launch PASSSKAG174_22_294
Skagit 3 Pass Lake 09/06/2022 Microcystin 318.000 0.150 Yes View West end of lake near boat launch PASSSKAG174_22_294
Skagit 3 Pass Lake 08/22/2022 Anatoxin-a 29.200 0.010 Yes View Boat Ramp PASSSKAG174_22_224
Skagit 3 Pass Lake 08/22/2022 Microcystin 8.350 0.150 Yes View Boat Ramp PASSSKAG174_22_224
Skagit 3 Pass Lake 06/27/2022 Anatoxin-a 0.035 0.010 No View Whole lake PASSSKAG174_22_057
Skagit 3 Pass Lake 06/27/2022 Microcystin <MDL 0.150 No View Whole lake PASSSKAG174_22_057
Skagit 3 Pass Lake 06/06/2022 Anatoxin-a 0.107 0.010 No View Boat Ramp PASSSKAG174_22_032
Skagit 3 Pass Lake 06/06/2022 Microcystin <MDL 0.150 No View Boat Ramp PASSSKAG174_22_032
Skagit 3 Pass Lake 05/02/2022 Anatoxin-a 0.059 0.010 No View winter sampling, no bloom PASSSKAG174_22_007
Skagit 3 Pass Lake 05/02/2022 Microcystin <MDL 0.150 No View winter sampling, no bloom PASSSKAG174_22_007
Skagit 3 Pass Lake 04/04/2022 Anatoxin-a 0.059 0.010 No View PASSSKAG174
Skagit 3 Pass Lake 04/04/2022 Microcystin <MDL 0.150 No View PASSSKAG174
Skagit 3 Pass Lake 03/08/2022 Anatoxin-a 0.094 0.010 No View PASSSKAG174
Skagit 3 Pass Lake 03/08/2022 Microcystin <MDL 0.150 No View PASSSKAG174
Skagit 3 Pass Lake 02/07/2022 Anatoxin-a 0.141 0.010 No View PASSSKAG174
Skagit 3 Pass Lake 02/07/2022 Microcystin <MDL 0.150 No View PASSSKAG174
Skagit 3 Pass Lake 10/28/2021 Anatoxin-a 0.182 0.010 No View Boat Ramp PASSSKAG174_21_549
Skagit 3 Pass Lake 10/28/2021 Microcystin 0.152 0.150 No View Boat Ramp PASSSKAG174_21_549
Skagit 3 Pass Lake 10/20/2021 Anatoxin-a 0.378 0.010 No View Boat Ramp PASSSKAG174_21_535
Skagit 3 Pass Lake 10/20/2021 Microcystin 24.100 0.150 Yes View Boat Ramp PASSSKAG174_21_535
Skagit 3 Pass Lake 10/11/2021 Anatoxin-a 0.979 0.010 No View Boat Ramp PASSSKAG174_21_493
Skagit 3 Pass Lake 10/11/2021 Microcystin 41.900 0.150 Yes View Boat Ramp PASSSKAG174_21_493
Skagit 3 Pass Lake 09/20/2021 Anatoxin-a 26100.000 0.010 Yes View Boat Ramp PASSSKAG174_21_409
Skagit 3 Pass Lake 09/20/2021 Microcystin 782.000 0.150 Yes View Boat Ramp PASSSKAG174_21_409
Skagit 3 Pass Lake 09/07/2021 Anatoxin-a 692.000 0.010 Yes View Boat Ramp PASSSKAG174_21_338
Skagit 3 Pass Lake 09/07/2021 Microcystin 44.200 0.150 Yes View Boat Ramp PASSSKAG174_21_338
Skagit 3 Pass Lake 08/24/2021 Anatoxin-a 13200.000 0.010 Yes View Boat Ramp PASSSKAG174_21_289
Skagit 3 Pass Lake 08/24/2021 Microcystin 0.419 0.150 No View Boat Ramp PASSSKAG174_21_289
Skagit 3 Pass Lake 08/12/2021 Anatoxin-a 2580.000 0.010 Yes View Boat Ramp PASSSKAG174_21_233
Skagit 3 Pass Lake 08/12/2021 Cylindrospermopsin <MDL 0.025 No View Boat Ramp PASSSKAG174_21_233
Skagit 3 Pass Lake 08/12/2021 Microcystin <MDL 0.150 No View Boat Ramp PASSSKAG174_21_233
Skagit 3 Pass Lake 08/12/2021 Saxitoxin <MDL 0.020 No View Boat Ramp PASSSKAG174_21_233
Skagit 3 Pass Lake 09/28/2020 Anatoxin-a 16.200 0.010 Yes View PASSSKAG174_20_415
Skagit 3 Pass Lake 09/28/2020 Microcystin 1110.000 0.150 Yes View PASSSKAG174_20_415
Skagit 3 Pass Lake 08/17/2020 Anatoxin-a 413.000 0.010 Yes View Entire Lake PASSSKAG174_20_257
Skagit 3 Pass Lake 08/17/2020 Microcystin 96.800 0.150 Yes View Entire Lake PASSSKAG174_20_257
Skagit 3 Pass Lake 07/20/2020 Anatoxin-a 0.138 0.010 No No PASSSKAG174_20_155
Skagit 3 Pass Lake 07/20/2020 Microcystin <MDL 0.150 No No PASSSKAG174_20_155
Skagit 3 Pass Lake 07/07/2020 Anatoxin-a 0.025 0.010 No No PASSSKAG174_20-122
Skagit 3 Pass Lake 07/07/2020 Microcystin 0.768 0.150 No No PASSSKAG174_20-122
Skagit 3 Pass Lake 06/22/2020 Anatoxin-a 0.015 0.010 No View PASSSKAG174_20_092
Skagit 3 Pass Lake 06/22/2020 Microcystin <MDL 0.150 No View PASSSKAG174_20_092
Skagit 3 Pass Lake 06/10/2020 Anatoxin-a <MDL 0.010 No View PASSSKAG174_20_078
Skagit 3 Pass Lake 06/10/2020 Cylindrospermopsin <MDL 0.025 No View PASSSKAG174_20_078
Skagit 3 Pass Lake 06/10/2020 Microcystin 11.000 0.150 Yes View PASSSKAG174_20_078
Skagit 3 Pass Lake 06/10/2020 Saxitoxin <MDL 0.020 No View PASSSKAG174_20_078
Skagit 3 Pass Lake 11/06/2019 Anatoxin-a 0.013 0.010 No No PASSSKAG174_19_214
Skagit 3 Pass Lake 11/06/2019 Microcystin 31.700 0.150 Yes No PASSSKAG174_19_214
Skagit 3 Pass Lake 10/10/2019 Anatoxin-a 15.500 0.010 Yes No PASSSKAG174_19_390
Skagit 3 Pass Lake 10/10/2019 Microcystin 69.900 0.150 Yes No PASSSKAG174_19_390
Skagit 3 Pass Lake 09/23/2019 Anatoxin-a 155.000 0.010 Yes View PASSSKAG174_19_214
Skagit 3 Pass Lake 09/23/2019 Microcystin 2010.000 0.150 Yes View PASSSKAG174_19_214
Skagit 3 Pass Lake 09/11/2019 Anatoxin-a 444.000 0.010 Yes No PASSSKAG174_19_214
Skagit 3 Pass Lake 09/11/2019 Microcystin 7150.000 0.150 Yes No PASSSKAG174_19_214
Skagit 3 Pass Lake 09/03/2019 Anatoxin-a 0.396 0.010 No No PASSSKAG174_19_214
Skagit 3 Pass Lake 09/03/2019 Microcystin <MDL 0.150 No No PASSSKAG174_19_214
Skagit 3 Pass Lake 10/17/2018 Anatoxin-a 0.018 0.010 No View PASSSKAG174_18_205
Skagit 3 Pass Lake 09/18/2018 Anatoxin-a 0.058 0.010 No No PASSSKAG174_28_205
Skagit 3 Pass Lake 09/18/2018 Microcystin 207.000 0.150 Yes No PASSSKAG174_28_205
Skagit 3 Pass Lake 11/01/2017 Anatoxin-a 0.337 0.010 No No PASSSKAG174_17_337
Skagit 3 Pass Lake 11/01/2017 Microcystin <MDL 0.150 No No PASSSKAG174_17_337
Skagit 3 Pass Lake 10/19/2017 Anatoxin-a 0.575 0.010 No No PASSSKAG174_17_311
Skagit 3 Pass Lake 10/19/2017 Microcystin <MDL 0.150 No No PASSSKAG174_17_311
Skagit 3 Pass Lake 10/11/2017 Anatoxin-a 246.000 0.010 Yes No PASSSKAG174_17_295
Skagit 3 Pass Lake 10/11/2017 Microcystin 10.100 0.150 Yes No PASSSKAG174_17_295
Skagit 3 Pass Lake 10/03/2017 Anatoxin-a 1360.000 0.010 Yes View PASSSKAG174_17_277
Skagit 3 Pass Lake 10/03/2017 Microcystin 16.900 0.150 Yes View PASSSKAG174_17_277
Skagit 3 Pass Lake 10/19/2016 Anatoxin-a <MDL 0.010 No No PASSSKAG174_16_301
Skagit 3 Pass Lake 10/19/2016 Microcystin 0.907 0.200 No No PASSSKAG174_16_301
Skagit 3 Pass Lake 09/22/2016 Anatoxin-a 0.018 0.010 No View PASSSKAG174_16_230
Skagit 3 Pass Lake 09/22/2016 Microcystin 110.000 0.160 Yes View PASSSKAG174_16_230
Skagit 3 Pass Lake 09/08/2016 Anatoxin-a <MDL 0.010 No No PASSSKAG174_16_203
Skagit 3 Pass Lake 09/08/2016 Microcystin 4.710 0.200 No No PASSSKAG174_16_203
Skagit 3 Pass Lake 02/02/2016 Anatoxin-a <MDL 0.010 No View PASSSKAG174_16_010
Skagit 3 Pass Lake 02/02/2016 Microcystin 2.7 0.160 No View PASSSKAG174_16_010
Skagit 3 Pass Lake 01/25/2016 Microcystin 0.358 0.160 No View PASSSKAG174_16_006
Skagit 3 Pass Lake 11/09/2015 Microcystin 487.000 0.160 Yes No PASSSKAG174_15_513
Skagit 3 Pass Lake 11/02/2015 Microcystin 149.000 0.160 Yes No PASSSKAG174_15_502
Skagit 3 Pass Lake 10/26/2015 Anatoxin-a <MDL 0.010 No View PASSSKAG174_15_492
Skagit 3 Pass Lake 10/26/2015 Microcystin 1.640 0.160 No View PASSSKAG174_15_492
Skagit 3 Pass Lake 10/19/2015 Anatoxin-a 0.049 0.010 No View passskag174_15_471
Skagit 3 Pass Lake 10/19/2015 Microcystin 1030.000 0.160 Yes View passskag174_15_471
Skagit 3 Pass Lake 10/05/2015 Anatoxin-a 0.014 0.010 No View PASSSKAG174_15_438
Skagit 3 Pass Lake 10/05/2015 Microcystin 1.730 0.160 No View PASSSKAG174_15_438
Skagit 3 Pass Lake 09/28/2015 Anatoxin-a <MDL 0.010 No No PASSSKAG174_15_421
Skagit 3 Pass Lake 09/28/2015 Microcystin 0.778 0.160 No No PASSSKAG174_15_421
Skagit 3 Pass Lake 09/21/2015 Anatoxin-a 0.823 0.010 No View PASSSKAG174_15_402
Skagit 3 Pass Lake 09/21/2015 Microcystin 117.000 0.160 Yes View PASSSKAG174_15_402
Skagit 3 Pass Lake 09/14/2015 Microcystin 13.200 0.160 Yes View PASSSKAG174_15_382
Skagit 3 Pass Lake 09/08/2015 Anatoxin-a 0.119 0.010 No View PASSSKAG174_15_361
Skagit 3 Pass Lake 09/08/2015 Microcystin 7.330 0.160 No View PASSSKAG174_15_361
Skagit 3 Pass Lake 08/31/2015 Anatoxin-a <MDL 0.010 No View PASSSKAG174_15_343
Skagit 3 Pass Lake 08/31/2015 Microcystin 0.722 0.160 No View PASSSKAG174_15_343
Skagit 3 Pass Lake 02/17/2015 anatoxin-a 0.010 0.010 No No Passskag15-037
Skagit 3 Pass Lake 02/17/2015 microcystin 0.700 0.160 No No Passskag15-037
Skagit 3 Pass Lake 02/04/2015 Anatoxin-a 0.020 0.010 No View PASSSKAG15_030
Skagit 3 Pass Lake 02/04/2015 Microcystin 1.700 0.160 No View PASSSKAG15_030
Skagit 3 Pass Lake 01/28/2015 Anatoxin-a <MDL 0.010 No No PASSSKAG15_027
Skagit 3 Pass Lake 01/20/2015 Anatoxin-a 0.290 0.010 No No PASSSKAG15_018
Skagit 3 Pass Lake 01/20/2015 Microcystin 6.000 0.160 No No PASSSKAG15_018
Skagit 3 Pass Lake 01/06/2015 Anatoxin-a 0.130 0.010 No View PASSSKAG15_003
Skagit 3 Pass Lake 01/06/2015 Microcystin 0.519 0.160 No View PASSSKAG15_003
Skagit 3 Pass Lake 12/15/2014 Anatoxin-a 0.084 0.010 No No PASSSKAG14_354
Skagit 3 Pass Lake 12/15/2014 Microcystin 0.957 0.160 No No PASSSKAG14_354
Skagit 3 Pass Lake 12/02/2014 Anatoxin-a 0.299 0.010 No No PASSSKAG14_346
Skagit 3 Pass Lake 12/02/2014 Microcystin 1.780 0.160 No No PASSSKAG14_346
Skagit 3 Pass Lake 11/18/2014 Anatoxin-a 0.463 0.010 No No PASSSKAG14_332
Skagit 3 Pass Lake 11/18/2014 Microcystin 32.400 0.160 Yes No PASSSKAG14_332
Skagit 3 Pass Lake 10/18/2012 Anatoxin-a 1.560 0.019 Yes View
Skagit 3 Pass Lake 10/18/2012 Microcystin <MDL 0.050 No View
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As of 6/26/2018 the format of the toxin and phytoplankton export has changed. A unique identification number has been added to each site.