Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 13 February 2026

    River Park Boathouse by Susanna Lang

    I saw goldeneyes and mallards and--never seen one here before--a white-winged scoter. According to what I've read, they're not supposed to be here, either.

  • 13 February 2026

    Sangamon River Forest Preserve by Bruce M Colravy

    Test values were Q. 1.4, ppm 35, the same values as the original data.

  • 13 February 2026

    River Bend Forest Preserve site by Bruce M Colravy

    Many ducks and geese at the site. Area still under severe drought.

  • 12 February 2026

    Wigwam Hollow Creek, beside Indian Trail St, Macomb. by Jumoke Ogunremi

    A second test strip was used in the same water sample and the result was the same as the first.

  • 12 February 2026

    Killjordan creek by Jumoke Ogunremi

    A second test strip was used and the Quantab readings was the same as the first strip.

  • 12 February 2026

    Timber Trails Park pond by Michelle Besch

    Ice on. Unable to take sample.

  • 12 February 2026

    McKee Creek by Michael Bily

    100 meters upstream from usual location due to lack of water

  • 11 February 2026

    Mitchell Lake by Jill Mattox

    Quantab Units 9. Greater than chart numbers.

  • 11 February 2026

    Forest Preserves of Cook County - Kickapoo Woods by David Schmid

    I was not able to get a chloride measurement today. The Little Calumet River at this site was frozen over.

  • 11 February 2026

    Forest Preserves of Cook County - Burnham, Illinois by David Schmid

    I did not take a chloride reading today. The lake was frozen over.

  • 10 February 2026

    Kickapoo Creek Park, 2000 N. Jefferson St., Lincoln, IL pedestrian bridge on park road by Pamela Moriearty

    Pamela Moriearty Low temperatures and snow event in early February led to ice on which persisted until 2/10/26 when higher temperatures led to areas of ice melt on Kickapoo Creek. Surface of nearby Brainards Branch was still ice-covered until 2/16/26.

  • 10 February 2026

    Richland Creek @ South Side City Park by David Laslie

    A male mallard duck and a young river otter enjoyed the stream today. Water was still, low, and green. Smelled of detergent.

  • 10 February 2026

    Spring Creek- RVC Amphitheater by SRES Student Environmental Organization

    Nitrites: 0ppm Turbidity: 10 JTU Phosphate: 0.5ppm Ice thickness: 6.4cm Ice trend: Increased from 4cm (03 Feb 26) to 6.4cm (10 Feb 26)

  • 10 February 2026

    Schoenberger Creek at West Belleville Bikeway by David Laslie

    White throated sparrows and cardinals overheard nearby. The football that has been in the stream since early in the season is still there and doesn't appear to have moved any.