Half of Louisiana's beaches are under an advisory this week for high bacteria levels.
Each week, from May through October, the Louisiana Department of Health Beach Monitoring Program tests water samples from 24 state beaches and estuaries for enterococci bacteria, found in sewage pollution. This bacteria can cause disease, infections, and rashes.
Ingesting the contaminated water or having it enter a break in the skin is what can make you sick.
The state posts signs along the beaches under advisories to let people know that bacteria levels are high.