skip to main content

King County Swimming Beach Monitoring


If you have question on this site, please contact Debra Bouchard (206) 477-4650.

Andrews Bay - Seward Park 0813SB

Please select a site   and a year  

Sample Date Temperature
(°C)
Temperature
(°F)
Included in Fecal Geomean Calculation?Fecal ColiformFecal Coliform Geometric MeanGeomean – using the five most recent samplesIncluded in E. coli Geomean Calculation?E. ColiE. coli Geometric MeanGeomean – using the five most recent samples
08/24/2015 21.0 69.8 Yes2429Nonot sampled 
08/17/2015 22.0 71.6 Yes4531Nonot sampled 
08/10/2015 23.0 73.4 Yes927Nonot sampled 
08/03/2015 24.0 75.2 Yes3253Nonot sampled 
07/29/2015 22.0 71.6 Yes7453Nonot sampled 
07/20/2015 23.0 73.4 Yes3134Nonot sampled 
07/13/2015 23.0 73.4 Yes2434Nonot sampled 
07/06/2015 26.0 78.8 Yes26033Nonot sampled 
06/29/2015 24.0 75.2 Yes3031Nonot sampled 
06/22/2015 22.0 71.6 Yes835Nonot sampled 
06/15/2015 21.0 69.8 Yes3440Nonot sampled 
06/08/2015 21.0 69.8 Yes2129Nonot sampled 
06/03/2015 Yes170 Nonot sampled 
06/01/2015 20.0 68.0 No3800 Nonot sampled 
05/26/2015 15.0 59.0 Yes61 Nonot sampled 
05/18/2015 16.0 60.8 Yes15 Nonot sampled 
05/11/2015 15.0 59.0 Yes7 Nonot sampled 

Table Legend

Cell Color Fecal Coliform Value Concern Level
symbol for low concern symbol for low concern Individual value < 200 CFU/100 ml Low Concern - safe for swimming
symbol for moderate concern Individual value >= 200 & < 1000 CFU/100 ml Moderate Concern – still safe for swimming
symbol for high concern Individual value >= 1000 CFU/100 ml
or geometric mean >= 200 CFU/100 ml
High Concern – flagged for resample. For more information see Beach Closure Protocol – Fecal coliform bacteria
NOTE: If the routine sample exceeds the standard, either a single sample that exceeds 1000 CFU/100ml or a geometric mean of the five most recent samples that exceeds 200 CFU/100ml, then re-sampling is triggered.

Cell Color E. coli Value Concern Level
symbol for high concern Individual value >= 410 CFU/100 ml
or geometric mean >= 126 CFU/100 ml
High Concern – flagged for resample. E. coli is not used as a Washington State standard but is used as an EPA standard.


Sample DateMicrocystin (µg/L)Anatoxin-a (µg/L)
08/24/2015<MDL 
08/17/2015<MDL 
08/10/2015<MDL<MDL
08/03/2015<MDL 
07/27/2015<MDL<MDL
07/20/2015<MDL 
07/13/2015<MDL 
07/06/2015<MDL 
06/29/2015<MDL<MDL
06/22/2015<MDL 
06/15/2015<MDL 
06/08/2015<MDL 
06/01/2015<MDL 

Table Legend

Cell Color Algal Toxin Value Concern Level
symbol for low concern symbol for low concern Anatoxin < 1 µg/L and Microcystin < 6 µg/L below state recreation guideline
symbol for high concern Anatoxin >= 1 µg/L or Microcystin >= 6 µg/L value above state recreation guideline. See Swimming Beach Closure Protocol – Toxic Algae

Note: Additional toxic algae data is available on the NW Toxic Algae webpage.


Seattle Parks Department