7 Day, 10 Year Low Flows Reports for the Chicagoland Area |
We are not responsible for errors or omissions. When boating, regardless of water depth, wear a PFD! |
S.T.P. = Sewage Treatment Plant |
S.T.P. discharge (in Cubic Feet/Second) |
Gauging Station flow (Cubic Feet/Second) | Industrial Discharge |
The numbers on this page represent
water (or effluent) flows at various discharge points and gauging stations
along each waterway. The entries are shown in upstream to downstream order.
The flow values shown are the average over the lowest 7-day period in 10
years. In other words, these values are minimums. Normal flows may be much
higher.
In general, the flow of given stream increases as you move downstream, but the numbers will not always add up between gauges. Surface evaporation alone can eliminate up to 2.1 cfs per square mile, also groundwater accretion and groundwater recharge will also consume water. For example, due to thin structure underneath, Salt Creek in the Western Springs area has a recharge loss of 6.4cfs. This list does not include seasonal sites such as camping parks or schools with discharge permits. |
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For example: The North Shore Sanitary Canal draws a minimum of 0.14 cfs from Lake Michigan at the canals mouth in Wilmette (which is regulated by international treaty), then, the waterway flows southward to the MWRD S.T.P. which discharges a minimum 367.0 cfs of treated effluence into the waterway. The waterway continues to flow south, receives a flow of 17.2 cfs from the North Branch of the Chicago River and then gauges at 385.0 cfs just before meeting the main channel downtown. Questions on what it all means? Email jwn@ripco.com | |||
One of the least expensive ways you can protect yourself is to purchase a small, unscented travel pack of diaper wipes, and after touching fish or the water, use the wipes to clean your hands. |
Calumet River System |
Grand Calumet River (Info is not available as to what enters this in Indiana)
Gauging station of combined Calumet and Grand Calumet Rivers (32.0 CFS)
MWRDGC Calumet S.T.P. (290.0 CFS)
Little Calumet River (Info is not available as to what enters this in Indiana)
Thorn Creek
North Creek
Gauging station after junction of Little Calumet and Calumet (350.0 CFS)
Chicago River System |
East Fork, North Branch Chicago River (or Skokie River)
West Fork, North Branch Chicago River
Long Run Creek
Des Plaines River System |
Mill Creek
Indian Creek
Buffalo Creek
Willow Creek
Salt Creek
Spring Brook
Addison Creek
Flag Creek
Sawmill Creek
Hickory Creek
Jackson Creek
Du Page River System |
West Branch, Du Page River
Lilly Cache Creek
Kankakee River System |
Singleton Ditch (we have no data on discharges in Indiana)
Iroquis River
Sugar Creek
Spring Creek
Exline Slough
Rock Creek
Horse Creek
Fox River System |
Nippersink Creek
North Branch Nippersink Creek
Squaw Creek
Flint Creek
Unnamed Creek (just south of Cary)
Ferson Creek
Blackberry Creek
Big Rock Creek
Little Rock Creek
Somonauk Creek
Indian Creek
Illinois River System (Northeastern Section) |
Vermilion River System |
South Fork, Vermilion River
North Fork, Vermilion River
Gauging station of combined North and South Forks, Vermilion River plus Hickory Creek (3.4 CFS)
Gauging station just before Pontiac IL water intake (3.7 CFS)
Pontiac IL water intake withdraws minimum 2.5 CFS from river for drinking purposes behind 7 foot dam.
Pontiac Gauge (#0554500) after Pontiac IL water intake (1.2 CFS)
Pontiac S.T.P. (2.10 CFS)
Gauging station after Pontiac S.T.P. (3.30 CFS)
Gauging station after Deer Creek junction (3.70 CFS)
Gauging station after Ida Creek junction (4.70 CFS)
Short Point Creek
Bailey Creek