Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 25 February 2026

    Bensenville at Irving by Tom Kubica

    Reading on chart was at 8.6. The highest conversion level stopped at 7.8 with a reading of 622 ppm of chloride. So level was off the chart.

  • 25 February 2026

    Salt Creek Park Forest Preserve by Tom Kubica

    Wildlife: 2 Red-bellied woodpeckers, 1 Northern cardinal, 1 Eastern cottontail rabbit.

  • 25 February 2026

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

  • 25 February 2026

    Dam 62 by JoAnn Schindler

    We were unable to take this reading on February 7 because of Ice coverage when we took the reading from Crystal Creek only 1000 feet away is the PPM don’t have to

  • 25 February 2026

    Oakton College by Tess Lesniak

    Oaktons lake was completely frozen over from the mid point of December through January and most of February. The ice is starting to melt now along the banks which is notable in the sample picture. Due to the ice (and my timing in Dec) today was the first sample I could take since November 2025.

  • 24 February 2026

    Central Park at Oak Brook Park District by Sally Beaumont

    Cold temperatures the last 2 days with higher winds and no precipitation. Mostly cloudy with some sun yesterday but no snow on the ground. Thin ice forming on creek due to cold temps.

  • 23 February 2026

    DuPage River at Riverwalk South Covered Bridge by Shelley Birdsong

    Some ice remains on river. This observation with Lot #A5177A

  • 23 February 2026

    Fox River by Nick Longo

    Duplicate is also 172. Tried earlier in the month but area was frozen. 2/7/26, 2/13/26 and 2/17/26.

  • 23 February 2026

    DuPage River at Riverwalk South Covered Bridge by Shelley Birdsong

    Some ice still on the edges of the river. This observation with Lot A429A.

  • 22 February 2026

    East Branch DuPage River at East Branch Forest Preserve by Ralph Watkins

    Water level is very high as it looks like there is a beaver dam just a bit downstream from my test site.