Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 8 December 2025

    West Branch Du Page River by Lawrence Hjorth

    The above sample is the Control test. It was taken from the same water sample tested with a different Quant strip. The difference is 40ppm.

  • 8 December 2025

    West Branch Du Page River by Lawrence Hjorth

    This sample is for December after a snowfall. I will follow up with a baseline sample.

  • 7 December 2025

    Bayou Path Dr Stream in Atwater Subdivision by Lisa Hjorth

    Inflow pond was mainly frozen (ice on) however the outflow test site was not completely iced over. There were 3 mallard ducks feeding in the open water sections. A major snow / salting event took place on 11.29.25 and an additional snowfall occurred overnight from 12.06.25 to the test day 12.07.25. There was approximately 10" of snow on the ground near the test site.

  • 7 December 2025

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

    On this same day, December 7, 2025 at 2:30 p.m., a duplicate test was taken. The result was 73 PPM, a difference of -32 PPM from the reported result, 105 PPM.

  • 7 December 2025

    Forest Preserves of Cook County - Kickapoo Woods by David Schmid

    On this same day, December 7, 2025 at 1:20 p.m., a duplicate test was taken. The result was the same as the reported result, 578 PPM.

  • 7 December 2025

    Spring Brook in St. James Farm Forest Preserve by Jay Gilbert

  • 7 December 2025

    Ferson Creek Park, Route 31, Saint Charles, IL by Patricia Gawrys

  • 6 December 2025

    Evans Field - Des Plaines River -Trail Marker 215 by Serena Pesch

  • 6 December 2025

    Pond at Briarcliff Neighborhood Beach by Lainey Howard

    Significant snow fall a week before observation.

  • 6 December 2025

    East Branch DuPage River at Churchill Woods by Beth Peluse

  • 6 December 2025

    Richland Creek @ Centennial Park by Greg Kimutis

    Had some ice on creek, open water in places.

  • 6 December 2025

    Copper Slough at Porter Park by Lainey Howard

    Significant snow fall a week before observation. Completely iced over and no water could be collected for testing.

  • 5 December 2025

    Long Run Creek - Homer Glen, IL by Greg Vejvoda

    Approximately 12 inches of snow has fallen over the local area since the last sample was collected on 7-Nov-2025. The current 5-Dec-2025 water sample reading was 6.8 Q-tab Units or 474 PPM. The water sample color was clear. There was a very small amount of foam that was floating in small clumps on the creek's surface.