Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 27 February 2025

    Tyler Creek Forest Preserve by Suzi Myers

    Quiet, no animals or birds. Couple of people sitting in cars.

  • 26 February 2025

    Veteran Acres - Sterne Woods (Oakwoods Lodge) by Far Syed

    There was still ice left on the water, slowly breaking, so I took a sample from the open water that was near, but was a bit dirty, so if the water fully melted, the chlorine levels would have increased, due to the warm weather, but was collected from the front.

  • 26 February 2025

    Lippold Park - West Entrance by Far Syed

    It seems like all the water melted away, and geese were swimming freely. After the water melted, the chlorine levels rose, since the weather was warm out.

  • 26 February 2025

    Kenyon Woods Forest Preserve by Michelle Besch

    Chloride was higher than 648, however measurement card only goes that high. Super muddy as lots of run off from melting snow and ice

  • 26 February 2025

    Tyler Creek Forest Preserve by Suzi Myers

    Cars, but no people. Very quiet

  • 26 February 2025

    Round Meadow Lake by Jane Barnett

    This lake is still nearly entirely frozen, but there was some free water around the edges. The Cl test result was very low, perhaps because of this. I had to estimate the ppm because the units were too low for the card. I had an almost entirely frozen situation one time last year, and it also had quite low Cl, although not as low as this time. The consistent no-ice reading has been about 4 units, and this time it was about .8 units. The previous icy time it was 2 units.

  • 26 February 2025

    Saint Joseph Creek by Robert Swirsky

    Quantab units were 8.0 and above the range of the conversion chart. Mostly covered with ice but able to get a sample. A lot of snow melting during the previous week.

  • 26 February 2025

    Forest Preserves of Cook County - Kickapoo Woods by David Schmid

  • 26 February 2025

    Long Run Creek - Homer Glen, IL by Greg Vejvoda

    No ice was present at sample site. Air Temp has been above freezing the last few days.