State water view

Illinois

Local water conditions, public water systems and state planning records. Check the sources and reporting dates for each topic.

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U.S. Drought Monitor · 2026-10-13

Drought conditions in Illinois

This is the latest drought map in this publication, effective 2026-10-13; it is not a live report.

37 of 102 counties have moderate drought (D1) or worse covering at least 1% of county area. The previous map, 2026-10-06, had 24 such counties.

County counts by highest category covering at least 1%: None: 53 · D0: 12 · D1: 37 · D2: 0 · D3: 0 · D4: 0. These are county counts, not percentages of state land or population. D0 means abnormally dry, not drought.

Cook County — D1 or worse: 0% of county area

Open the drought map and historical playback · U.S. Drought Monitor source

Public drinking-water systems

Open a system for its available testing and source records. A system’s service area can cross city and county boundaries.

Chicago Department of Water Management

River flow

Illinois river-gauge histories

Explore daily flow readings and history at 187 named USGS gauges in Illinois. These are individual monitoring sites, not a complete inventory or a river-wide water-health score. Check the gauge location, date and source notes. Flow does not establish drinking-water safety or supply to a home.