Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 18 December 2025

    DuPage River at South Hammel Woods Kayak Launch by Miranda Gollwitzer

  • 18 December 2025

    West Branch of the Dupage River at Weigand Riverfront Park by Erin Bellassai

  • 18 December 2025

    Salt Creek Park Forest Preserve by Tom Kubica

    4 Canadian geese. 1 Red tail hawk. 1 Red bellied woodpecker.

  • 18 December 2025

    Prentiss Creek at Prentiss Street by Gloria Walsh-Rock

    Also did second test to calibrate strips. Second strip also read 622 ppm. Picture uploaded.

  • 17 December 2025

    Kenyon Woods Forest Preserve by Michelle Besch

    Frozen solid; unable to collect sample;

  • 17 December 2025

    Springbrook Creek @ N Circle Ave, Bloomingdale by Elizabeth Bolivar

    Lots of ducks up stream

  • 17 December 2025

    Legion Park-NSCP by Meggan Kehrli

    The top of the test strip never got as black as expected -- it did get wet from the river water sample and I think that made the top bleed the black off a bit again. Test strip was in the water sample for approx 10 min. Beautiful morning and a fair number of birds out: dozens of mallards, Canada geece, one Goldeneye, 2 American kestrels, Kingfisher, crows and a Cooper's hawk.

  • 16 December 2025

    River Park Boathouse by Susanna Lang

    Lots of hopeful (and then disappointed) ducks, including a couple of goldeneyes not in the photo. Partial ice coverage.

  • 16 December 2025

    Creek under Fairmount Ave, east side of bridge by Francis Fraundorf

    Observed about 20 mature tadpoles in the open water area, which was approximately 2 foot and diameter

  • 16 December 2025

    Boneyard Creek just south of the corner of Springfield Ave and Second St by Wendy Harris

    Actual quantab reading was 8.9, way over the 7.8 max on the conversion chart. Ducks were present today

  • 16 December 2025

    Otter Creek by Gary Swick

    /Users/garyswick/Desktop/IMG_3001.HEIC

  • 13 December 2025

    Spring Creek at Anderson Gardens by Bob G.

    No baseline data available. First reading. Snow/salting event 3 days prior to measurement.

  • 13 December 2025

    Big Hollow Creek in Iris Park by Robert Rowe

    Quantab unit was up to 9.2. The Conversion table only went up to 7.8 or 641 ppm. Recent snow fall and subsequent snow melt has meant that a lot of salt was used on the streets leading down to the ravine.