MISSISSIPPI RIVER AT DAM 13 NEAR FULTON, IL

Water temperature directly affects fish metabolism and activity. Optimal range varies by species.

Amount of oxygen dissolved in water. Essential for fish survival. 6+ mg/L is ideal for most fish species.

Measures water cloudiness caused by suspended particles. Lower values indicate clearer water. <25 NTU is good.

Water temperature directly affects fish metabolism and activity. Optimal range varies by species.

Measures dissolved ions and minerals in water. Indicates salinity and pollution levels. Freshwater: 100-500 µS/cm.

Measures water cloudiness caused by suspended particles. Lower values indicate clearer water. <25 NTU is good.

Amount of oxygen dissolved in water. Essential for fish survival. 6+ mg/L is ideal for most fish species.

Conductivity (µS/cm) - a water quality measurement. Contact local authorities for specific safety guidelines.

Measures dissolved ions and minerals in water. Indicates salinity and pollution levels. Freshwater: 100-500 µS/cm.