Lake Ketchum

Located north of Stanwood, Lake Ketchum (Snohomish County) is a 24 acre lake that experiences frequent blue-green algae blooms. These blooms can produce harmful toxins, and the lake may be posted with warnings to avoid water contact. The 2009 sample had very high levels of phosphorus (an algal nutrient) and chlorophyll, which may have been associated with an algal bloom.


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Data

LakeKeyDateDO mg/LTemp CpHCond uS/cmChl ug/LAlk mg/LTurb NTUNH3 ug-N/LTN ug-N/LNO2+3 ug-N/LTP ug-P/LSRP ug-P/L
KetchumKET8/31/0915.320.99.916832347.113.3< 101571< 10218119
KetchumKET3/24/109.5812.67.54156.5NA41.81.81NANANANANA
KetchumKET6/23/103.4221.27.3146.11.242.14.3481175333.612584.6
KetchumKET7/25/1110.321.28.7134.8NA40.17.835.4136870.999.93.5
KetchumKET7/31/128.5237.4126.53.535.7NA170101712846.19.2
KetchumKET7/15/1314.1923.910144.354.937.44.79< 101289.8< 1059.54.3
KetchumKET7/28/1411.122.68.820630.641.47.96< 1084133.631< 3
KetchumKET7/20/1510.7625.79.1212NA44.81.57< 10452.5< 1016.3< 3
KetchumKET7/18/1610.6624.191633.540.82.4610.4628.3< 1023.5< 3

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