Site identity
Lake, Reservoir, Impoundment
- Monitoring ID
- USGS-04087440
- Organization
- USGS Illinois Water Science Center
- Provider
- NWIS
- Coordinates
- 41.88928, -87.60794
Environmental monitoring site
LAKE MICHIGAN AT CHICAGO LOCK AT CHICAGO, IL
This page describes measurements at one monitoring location. It does not characterize the whole river, lake, watershed, or drinking-water system.
Recent observations in current data
Few or no recent measurements available
A missing result means we have no measurement to show here. It does not tell us whether the water is good or poor.
History
Measurement history at this site
Compare changes over time using the dates and units on each chart. Instantaneous readings, daily averages and individual samples remain separate.
monitoring site
Lake Michigan at Milwaukee
1 observationsirregular sample resolutionDec 19, 2005 to Dec 19, 2005
Method and recent values
Discrete samples grouped only where characteristic, unit, method, and fraction match.
Method version: wqp-compatible-series-v1. No smoothing is applied. Points are discrete samples; no line is drawn between them.
- Dec 19, 2005310 uS/cm @25C
Evidence-backed context