Hill Slough Water Level

Q: What is the water level of Hill Slough today?

Hill Slough water levels are measured at USGS gauge ILLINOIS RIVER AT FLORENCE, IL; the current gauge height updates on this page throughout the day, alongside a 30-day trend.

Q: Is Hill Slough high or low right now?

This page compares the current reading against the trailing 30-day average and range for Hill Slough — above the average means higher water than usual, below means lower.

Live gauge height for Hill Slough, measured at USGS station ILLINOIS RIVER AT FLORENCE, IL (6.5 mi from the nearest mapped ramp).

Current gauge height

19.84 ft

Updated 30 min ago

vs. 30-day average

+1.44 ft

30-day avg: 18.40 ft

Water temperature

68°F

30-Day Water Level Trend

2026-09-12Range: 15.54–20.85 ft2026-10-11

Hill Slough is currently 1.4 ft above its 30-day average — ramps and courtesy docks may sit deeper than usual; watch for submerged hazards near shorelines.

Boat Ramps on Hill Slough (2)

Hill Slough Access — TOWN OF SPRING GREEN, Wisconsin
Hill Slough Access Boat Ramp — Morgan township, Arkansas

See all Hill Slough boat ramps →

Hill Slough Water Level FAQ

What is the water level of Hill Slough today?

The USGS gauge for Hill Slough (ILLINOIS RIVER AT FLORENCE, IL) currently reads a gauge height of 19.84 feet, 1.4 ft above its 30-day average. Readings update throughout the day from USGS instrumentation.

Is Hill Slough high or low right now?

Compared with the past 30 days, Hill Slough is 1.4 ft above its 30-day average.

Where can I launch a boat on Hill Slough?

BoatLaunchMap lists 2 boat ramps on Hill Slough, each with directions, ratings, and launch details.

Data: U.S. Geological Survey, station 05586300. Gauge height is measured relative to the station datum, not lake depth. Always verify conditions on site before launching.