Each year in the spring (April – June), an increase in the turbidity of drinking (potable) water occurs at Grand Canyon National Park. Turbidity has no health effects.  https://www.nps.gov/grca/learn/news/info-2009-04-01-turbid.htm

Each year in the spring, Grand Canyon National Park experiences an increase in turbidity in the drinking water. This increased turbidity is caused by snow melt, spring rains recharging the aquifer and increased water flows through the rock formations to Roaring Springs.. https://www.nps.gov/grca/learn/news/2012-04-30_turbidity.htm

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