Air Quality Alert
None

The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Tuesday July 14th for the greater Chicago Metropolitan Area and is in effect through Tuesday night. An Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups category of the Air Quality Index for multiple days. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. Area residents are urged to reduce pollution levels. Air quality forecasts, current air quality, and tips on how you can reduce your emissions can be found at www.airnow.gov. Media contact...Illinois EPA.

Long Run Near Lemont, Il Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 48.94
01-02 28.31
01-03 19.93
01-04 27.68
01-05 19.32
01-06 15.92
01-07 14.19
01-08 16.1
01-09 78.53
01-10 63.61
01-11 64.37
01-12 43.61
01-13 45.29
01-14 24.6
01-15 20.78
01-16 14.49
01-17 14.66
01-18 15.51
01-19 17.35
01-20 18.62
01-21 13.48
01-22 10.98
01-23 34.33
01-24 45.99
01-25 47.24
01-26 74.71
01-27 72.11
01-28 36.23
01-29 28.94
01-30 36.18
01-31 34.09
02-01 19.59
02-02 20.82
02-03 37.38
02-04 38.04
02-05 27.53
02-06 25.56
02-07 21.87
02-08 31.57
02-09 17.31
02-10 35.38
02-11 27.86
02-12 22.0
02-13 18.68
02-14 15.1
02-15 13.65
02-16 20.03
02-17 72.32
02-18 30.9
02-19 19.38
02-20 59.61
02-21 82.62
02-22 66.57
02-23 94.14
02-24 55.3
02-25 21.23
02-26 15.42
02-27 23.99
02-28 50.2
02-29 11.98
03-01 48.18
03-02 36.72
03-03 25.98
03-04 23.96
03-05 33.65
03-06 31.59
03-07 25.57
03-08 22.98
03-09 38.93
03-10 45.9
03-11 89.34
03-12 57.88
03-13 36.35
03-14 43.88
03-15 80.27
03-16 62.46
03-17 38.98
03-18 36.63
03-19 31.3
03-20 50.74
03-21 43.79
03-22 27.1
03-23 20.97
03-24 30.77
03-25 38.35
03-26 38.69
03-27 36.64
03-28 29.4
03-29 25.51
03-30 28.2
03-31 97.04
04-01 66.7
04-02 45.11
04-03 83.58
04-04 65.96
04-05 47.44
04-06 62.35
04-07 53.95
04-08 35.93
04-09 30.8
04-10 34.71
04-11 35.59
04-12 31.81
04-13 23.14
04-14 30.2
04-15 31.15
04-16 44.2
04-17 32.42
04-18 70.17
04-19 73.94
04-20 49.62
04-21 32.3
04-22 25.07
04-23 29.83
04-24 29.13
04-25 24.96
04-26 29.25
04-27 18.99
04-28 27.67
04-29 72.32
04-30 128.5
05-01 124.67
05-02 68.39
05-03 41.35
05-04 51.92
05-05 34.67
05-06 32.68
05-07 38.95
05-08 36.5
05-09 57.01
05-10 70.07
05-11 64.13
05-12 52.02
05-13 33.14
05-14 23.15
05-15 51.65
05-16 30.86
05-17 32.98
05-18 118.5
05-19 57.73
05-20 27.96
05-21 22.48
05-22 47.37
05-23 26.77
05-24 37.35
05-25 22.79
05-26 25.13
05-27 37.02
05-28 60.17
05-29 89.68
05-30 50.28
05-31 29.22
06-01 21.67
06-02 18.04
06-03 13.09
06-04 10.45
06-05 15.92
06-06 11.14
06-07 12.96
06-08 12.41
06-09 12.5
06-10 54.97
06-11 42.4
06-12 30.66
06-13 48.03
06-14 20.13
06-15 27.41
06-16 57.94
06-17 32.68
06-18 16.01
06-19 32.43
06-20 18.42
06-21 31.73
06-22 65.54
06-23 40.18
06-24 19.32
06-25 21.79
06-26 18.84
06-27 41.43
06-28 15.58
06-29 37.24
06-30 36.77
07-01 38.94
07-02 25.07
07-03 33.25
07-04 20.84
07-05 58.32
07-06 74.1
07-07 20.23
07-08 13.74
07-09 14.44
07-10 8.72
07-11 7.8
07-12 16.37
07-13 68.19
07-14 44.04
07-15 15.01
07-16 13.2
07-17 13.57
07-18 10.34
07-19 10.28
07-20 13.59
07-21 11.84
07-22 29.67
07-23 22.34
07-24 34.37
07-25 48.41
07-26 27.55
07-27 11.54
07-28 8.34
07-29 26.33
07-30 23.84
07-31 10.36
08-01 6.85
08-02 4.26
08-03 4.85
08-04 5.85
08-05 7.1
08-06 7.06
08-07 4.59
08-08 7.82
08-09 5.41
08-10 3.98
08-11 3.91
08-12 3.71
08-13 24.13
08-14 7.07
08-15 11.6
08-16 6.98
08-17 5.42
08-18 7.29
08-19 25.47
08-20 19.98
08-21 17.92
08-22 11.76
08-23 8.4
08-24 13.17
08-25 5.73
08-26 18.33
08-27 19.22
08-28 20.69
08-29 8.83
08-30 9.27
08-31 6.43
09-01 4.82
09-02 7.35
09-03 4.7
09-04 9.67
09-05 5.63
09-06 7.09
09-07 9.14
09-08 8.12
09-09 7.08
09-10 5.25
09-11 17.96
09-12 15.06
09-13 7.55
09-14 6.52
09-15 4.53
09-16 7.65
09-17 4.73
09-18 11.85
09-19 18.41
09-20 14.7
09-21 6.94
09-22 6.87
09-23 17.34
09-24 7.01
09-25 3.57
09-26 5.62
09-27 9.69
09-28 84.67
09-29 40.14
09-30 33.9
10-01 13.69
10-02 12.99
10-03 10.87
10-04 30.53
10-05 11.67
10-06 16.51
10-07 16.2
10-08 18.72
10-09 10.7
10-10 7.11
10-11 22.22
10-12 15.43
10-13 11.38
10-14 14.0
10-15 69.01
10-16 36.83
10-17 18.05
10-18 12.67
10-19 11.42
10-20 10.46
10-21 10.18
10-22 8.21
10-23 8.97
10-24 22.18
10-25 27.95
10-26 28.89
10-27 94.09
10-28 33.76
10-29 19.47
10-30 16.77
10-31 41.72
11-01 33.21
11-02 20.01
11-03 15.68
11-04 13.82
11-05 14.08
11-06 14.61
11-07 17.73
11-08 12.3
11-09 23.34
11-10 19.68
11-11 14.99
11-12 11.87
11-13 10.97
11-14 9.23
11-15 8.44
11-16 14.86
11-17 12.39
11-18 29.89
11-19 46.61
11-20 26.46
11-21 19.46
11-22 33.5
11-23 18.9
11-24 12.18
11-25 15.54
11-26 23.72
11-27 29.69
11-28 21.86
11-29 37.58
11-30 21.23
12-01 19.42
12-02 41.2
12-03 24.68
12-04 20.46
12-05 16.9
12-06 16.45
12-07 14.95
12-08 13.11
12-09 12.18
12-10 11.13
12-11 13.1
12-12 11.63
12-13 14.11
12-14 10.68
12-15 63.96
12-16 27.77
12-17 26.24
12-18 15.74
12-19 14.5
12-20 10.25
12-21 16.5
12-22 23.77
12-23 23.83
12-24 33.71
12-25 18.73
12-26 23.99
12-27 17.83
12-28 26.89
12-29 32.84
12-30 62.58
12-31 32.57

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index