Dataset

Winter Chloride Watch

Dataset by National Great Rivers

Dataset summary

Observations

  • 7 November 2025

    Ferson Creek Park by Rod Allen

    Flow rate and rain fall from USGS station located about 2mi upstream, on Randall Road

  • 7 November 2025

    Mill Creek at bike trail bridge by Rod Allen

    Rain fall and stream flow data from USGS gauge located upstream about 5km

  • 7 November 2025

    Bayou Path Dr Stream in Atwater Subdivision by Lisa Hjorth

    The PPM was rounded up, although it barely reached the QT 3.6 / PPM 137. The inflow from the large pond was obstructed by what appears to be intentional damming perhaps by a muskrat. Although no muskrat was observed, the mud, sticks, and stones did not appear to have been done by wind and waves. The HOA was notified. The obstructed inflow did reduce the water flowing at the test site (outflow). The outflow was not measured; this observation is based on the lack of water ripples observed in the past. This data was collected prior to the first snowfall which occurred on 11.08 -09.2025

  • 7 November 2025

    Frank Holten State Park by Jen Hemphill

    Water quality taken with EXO2.

  • 7 November 2025

    Bridge over river on Gartner Road near Edgewater Drive by Gerry Gorman

    Light rain during the past 12 hours but river has been low. 1st observation of the season.

  • 7 November 2025

    Fox River by Nick Longo

    Water is very stagnate at this location.

  • 7 November 2025

    West Branch Dupage River by Gerry Gorman

    1st observation of season. River is low although we had rain earlier this morning.

  • 6 November 2025

    Nippersink Creek at the Keystone Landing in McHenry County Conservation District's Glacial Park Conservation Area by Sue Rose

    Prescribed burn in the area causing smokey conditions.

  • 6 November 2025

    South Branch Kishwaukee River at College Ave. by WILLIAM MARTIN

    Time on post-it is off by 1 hour. Samples taken locally at 1:30pm Central. Water level in S. Branch of Kishwaukee River as measured at College Avenue Bridge is very low.

  • 6 November 2025

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

    Time recorded on post-it is off by 1 hour. Samples taken at 1:30pm Central.

  • 6 November 2025

    Hickory Creek River at Highland Park Drive by Kathy Janik

  • 6 November 2025

    Salt Creek S Elmhurst canoe launch by Andrea Studzinski

    First test of the year - before any snow and salt on the roads. This was my duplicate test result - got the same result for both tests.

  • 6 November 2025

    Hill Ave Bridge by Joe Wywrot

    Calibration Quantab reading = 3.6

  • 6 November 2025

    Hill Ave Bridge by Joe Wywrot

    Calibration test also measured 137ppm chloride

  • 6 November 2025

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

    Had to change access locations - current location was too inaccessible, especially in winter. New site is just upstream at this location (41.9316410, -88.3443448). Creek will still be tested down stream of other site, yet up stream of Randall Rd bridge. We may experience less contamination, but safer access point.