Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 2 December 2025

    Schulenberg Prairie-Willoway Brook by Linda Heuser

    Willoway results & site

  • 1 December 2025

    Harry J. Wolf by Harry Wolf

    Photo #1 downstream at monitoring site Photo #2 upstream at monitoring site. Photo #3 recorded chloride data. Note: Pollution source I noted (urban/road discharge) is approximately 1 mile upstream.

  • 1 December 2025

    DuPage River at Riverwalk South Covered Bridge by Shelley Birdsong

    Purposefully came before snow and few days ago and now after first major storm. Confirmed guess that ppm would be elevated.

  • 1 December 2025

    Thunderbird Trail Crossing of Klein Creek by David Bohnsack

  • 1 December 2025

    Fox River by Nick Longo

    Sampled from the south end, east side of the bridge. Wasn't safe to sample from ledge with accumulated snow (in second photo) as previous sampler did. Was still in close vicinity.

  • 1 December 2025

    Bliss Woods -Blackberry Creek by Nick Longo

    Duplicate taken. Slightly below original. Original test strip seemed to drift up during second test so included both photos of test cards.

  • 30 November 2025

    Nippersink Creek @ Rte 12 (west of State Park Rd intersection) by Cindy Skrukrud

    sidewalk on bridge blocked with snow-could not access so no sample I also could not throw bucket over the ice into the open water safely from the side of the creek.

  • 30 November 2025

    Newman Creek @ N Queen Anne Rd by Cindy Skrukrud

    water clear beaver dam at upstream side

  • 30 November 2025

    North Branch Nippersink Creek @ W Solon Rd by Cindy Skrukrud

    sediment in water

  • 30 November 2025

    Harms Woods/Glenview Woods by Mac Austin

    River pretty high. Good current. Fluffy snow. No wind. No sign of duck, geese or other critters.

  • 30 November 2025

    River Grove at Grand Ave by Erika Street Hopman

    7.0 Quantab units, 469 ppm, plows going by while I was there

  • 30 November 2025

    Westernmost bridge in Dunning Read Natural Area Park by Erika Street Hopman

    8.6 Quantab units so greater than 622 ppm, but off conversion chart

  • 30 November 2025

    Creek at Merry Meadows by James Weiss

    Still water. Lots of leaf debris. Less than 29 ppm cloride

  • 28 November 2025

    Hudson Crossing Park by Kaelyn Groth

    A beautiful sunny day with clear flowing water and minimal people/animals.