Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 18 February 2026

    Round Meadow Lake by Jane Barnett

    This lake is still primarily ice covered, even with above freezing temperatures during this past week. I tested the small amount of water at the edge of the lake. The ppm was very low, and I've seen this before when the lake is mostly ice. I assume I'm testing mostly melted snow or rain on top, and not really the lake.

  • 18 February 2026

    Tyler Creek Forest Preserve by Suzi Myers

    More people and birds

  • 18 February 2026

    Brookbank Rd bridge over St. Joseph creek in Downers Grove. by Steve Ruffolo

    Readings were above those on the card. Last night's rain likely was any salt and salt dust off the roads and into the creek

  • 18 February 2026

    East Branch Poplar Creek by William Quinn

    Used two test strips. Both exceeded the upper limit on the quantab conversion chart.

  • 17 February 2026

    Salt Creek S Elmhurst canoe launch by Andrea Studzinski

    Muddy!

  • 17 February 2026

    Ferson Creek at Randall Road bike trail bridge by Lisa O'Brien

    Unusual weather for February. Coming out of over 20 days below freezing, many days in single digits and subzero wind chills. This week has been sunny/partly sunny and highs in the 50-60s. Creek was free flowing, but still had ice patches on it. There are 2 beaver dams upstream and a large debris blockage (not new). Note this location is farther upstream the previous locations at the bike bridge. Noted to coordinator at beginning of testing.

  • 17 February 2026

    Creek Bend Pond by Lisa O'Brien

    Unusual weather for February. Coming out of over 20 days below freezing, many days in single digits and subzero wind chills. This week has been sunny/partly sunny and highs in the 50-60s. Ice thick enough it has not melted yet on the pond. Water collected is most likely snow/ice melt water.

  • 17 February 2026

    Morgan Creek at Morgan Creek Park by Alyssa Theodor

    Creek mostly melted with a little bit of ice on edges

  • 17 February 2026

    Springbrook Creek @ N Circle Ave, Bloomingdale by Elizabeth Bolivar

  • 17 February 2026

    Lake Charles at Beach Inlet by Darlene Garay

    the reading was 10 Quantabs and possibly could have been higher, but that's as high as the test strip goes