Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 17 January 2026

    Spring Creek at Anderson Gardens by Bob G.

    Salting event 2 days before with melting/runoff following.

  • 16 January 2026

    South Branch Kishwaukee River at College Ave. by WILLIAM MARTIN

    Sorry, lost photo of location.

  • 16 January 2026

    Inflow to East Lagoon at Montgomery to Faraday pedestrian bridge by WILLIAM MARTIN

    Sorry, lost photo of bridge location.

  • 15 January 2026

    Jon Duerr Forest Preserve Fox River by Julie Chadwick

    The water was moving slowly and there were a lot of geese on the water.

  • 15 January 2026

    Prentiss Creek in Downers Grove (1911 Prentiss St.) by Patricia Weikersheimer

  • 15 January 2026

    Fox River by Julie Chadwick

    The sample was taken across the waterway from the official testing site, due to ice along the shore where the open water couldn't be reached. (North side of the walking bridge, as opposed to the south, island side of the bridge.)

  • 14 January 2026

    West branch of DuPage river at Beecher Rd, Winfield by Chris Thomson

  • 13 January 2026

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

    Usually at this park, when the weather has been really good for a past few days, the pond was still icy for some reason, and fortunately, there was an opening to collect the water sample, but it came out as less chlorine levels, so not sure what has happened, and it may be due to the water being icy for too long. I may need to collect the water sample, in the different side of the same pond, since the water’s usually not that icy!

  • 13 January 2026

    Lippold Park - West Entrance by Far Syed

    The water was very wavy and moving, so without ice, and not knowing where the water may have been coming from, there was an increase in the chlorine levels, but it was still a beautiful site!

  • 13 January 2026

    Apple Orchard Park - Mendota Creek by Amy Brewer

    Photo shows yearly „doublecheck“.

  • 13 January 2026

    Snyder's Grove by Amy Brewer

    Yearly double check in first photo

  • 13 January 2026

    Springbrook Creek @ S Maple Ave, Itasca by Elizabeth Bolivar