HANAHAN — Sorry, no sipping at this tasting event. The participants delicately draw the snifter to their nose for a waft, then move to the next one.

And don’t bother about bouquet, finish, black cherry or plum.

It’s just water and it smells like dirt.

Twice a week, a cadre of impromptu Charleston Water System volunteers edge their way into a lab at the Hanahan treatment plant to sniff for geosmin and methylisoborneol.

Their noses are your best friends these spring days, when warming waters have algae levels spiking in Bushy Park Reservoir, the source for much of the drinking water for 400,000 people in and around Charleston.

Read more in tomorrow’s The Post and Courier.

Science and environment reporter. Author of Washing Our Hands in the Clouds.