Lake Samish Water Advisory Issued

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  Whatcom County Public Health issued a water quality advisory Tuesday“Water Quality Advisory For Residents with Private Drinking Water Systems on Lake Samish — Tue, 28 Jul 2026 17:07:00 -0800 If you get your drinking water directly from Lake Samish through your own private drinking water system, be aware that a recent surface water test found increased levels of microcystin, a cyanotoxin that can be produced by blue-green algae, in the lake.”
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  Whatcom County Public Health issued a water quality advisory for residents using private drinking water systems connected to Lake Samish“If you get your drinking water directly from Lake Samish through your own private drinking water system, be aware that a recent surface water test found increased levels of microcystin, a cyanotoxin that can be produced by blue-green algae, in the lake.”
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  The water quality advisory was due to elevated microcystin levels detected in surface water tests“If you get your drinking water directly from Lake Samish through your own private drinking water system, be aware that a recent surface water test found increased levels of microcystin, a cyanotoxin that can be produced by blue-green algae, in the lake.”
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  The advisory specifically targets those with private systems drawing directly from the lake“If you get your drinking water directly from Lake Samish through your own private drinking water system, be aware that a recent surface water test found increased levels of microcystin, a cyanotoxin that can be produced by blue-green algae, in the lake.”
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  Microcystin is a cyanotoxin produced by blue-green algae“a recent surface water test found increased levels of microcystin, a cyanotoxin that can be produced by blue-green algae, in the lake.”
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  The county advises residents to avoid consuming untreated lake waterNo usable supporting receipt — unverified.
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  The county advises residents to follow guidance from public health officialsNo usable supporting receipt — unverified.
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  Public Health previously issued a general advisory about harmful algae blooms on July 24No usable supporting receipt — unverified.
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  Warmer temperatures and nutrients can cause rapid growth of potentially toxic algae“Summer is in full swing! Warmer temperatures and extra nutrients in the water can cause blue-green algae to grow rapidly at this time of year.”
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  The July 28 advisory follows recent test results showing increased toxin levels“If you get your drinking water directly from Lake Samish through your own private drinking water system, be aware that a recent surface water test found increased levels of microcystin, a cyanotoxin that can be produced by blue-green algae, in the lake.”