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Air Quality Alert
None

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: S Fairfield, S New Haven, S Middlesex, S New London from 11 AM to 11 PM EDT Tuesday. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi

Pawcatuck River At Westerly, Ri Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 908.91
01-02 884.1
01-03 848.5
01-04 830.0
01-05 745.36
01-06 761.64
01-07 768.36
01-08 717.92
01-09 683.58
01-10 783.36
01-11 924.82
01-12 954.09
01-13 974.4
01-14 1095.3
01-15 1010.6
01-16 944.1
01-17 1014.0
01-18 810.91
01-19 884.5
01-20 874.08
01-21 831.09
01-22 767.67
01-23 729.64
01-24 794.73
01-25 934.27
01-26 1086.7
01-27 1147.6
01-28 1016.64
01-29 992.36
01-30 919.55
01-31 874.0
02-01 767.5
02-02 730.92
02-03 678.77
02-04 689.33
02-05 798.5
02-06 787.0
02-07 865.09
02-08 857.7
02-09 817.75
02-10 809.64
02-11 752.42
02-12 812.64
02-13 796.55
02-14 735.82
02-15 786.17
02-16 765.08
02-17 834.64
02-18 918.64
02-19 834.91
02-20 820.85
02-21 805.92
02-22 729.64
02-23 765.27
02-24 821.55
02-25 862.2
02-26 852.18
02-27 863.45
02-28 891.18
02-29 881.0
03-01 854.82
03-02 839.27
03-03 976.64
03-04 1010.0
03-05 1015.75
03-06 957.92
03-07 948.67
03-08 965.42
03-09 928.67
03-10 884.0
03-11 1004.77
03-12 1017.33
03-13 972.85
03-14 980.08
03-15 1044.21
03-16 1082.0
03-17 1080.0
03-18 1123.15
03-19 1050.0
03-20 1026.69
03-21 947.71
03-22 911.14
03-23 864.67
03-24 918.07
03-25 992.71
03-26 1024.92
03-27 977.54
03-28 916.93
03-29 957.71
03-30 1000.29
03-31 1025.5
04-01 954.69
04-02 1010.43
04-03 1142.27
04-04 977.15
04-05 1082.86
04-06 1110.2
04-07 1106.57
04-08 1042.85
04-09 1021.0
04-10 959.46
04-11 953.29
04-12 791.83
04-13 776.25
04-14 810.58
04-15 783.42
04-16 773.58
04-17 789.5
04-18 797.33
04-19 780.67
04-20 851.23
04-21 785.77
04-22 781.0
04-23 802.25
04-24 851.33
04-25 806.18
04-26 796.5
04-27 909.08
04-28 921.0
04-29 865.92
04-30 799.67
05-01 808.29
05-02 759.69
05-03 731.54
05-04 782.0
05-05 749.42
05-06 835.08
05-07 850.15
05-08 745.83
05-09 766.23
05-10 811.23
05-11 802.5
05-12 723.92
05-13 694.0
05-14 594.08
05-15 598.42
05-16 600.45
05-17 660.54
05-18 684.36
05-19 676.5
05-20 628.85
05-21 680.69
05-22 670.38
05-23 706.92
05-24 704.31
05-25 687.15
05-26 693.69
05-27 638.23
05-28 581.62
05-29 543.07
05-30 562.33
05-31 566.53
06-01 558.07
06-02 524.07
06-03 511.4
06-04 485.8
06-05 466.43
06-06 456.2
06-07 440.21
06-08 453.29
06-09 522.93
06-10 513.13
06-11 541.79
06-12 458.0
06-13 449.5
06-14 456.42
06-15 455.17
06-16 393.31
06-17 390.69
06-18 409.23
06-19 435.83
06-20 418.67
06-21 393.0
06-22 375.25
06-23 367.17
06-24 375.92
06-25 398.17
06-26 414.67
06-27 391.33
06-28 376.67
06-29 364.5
06-30 378.69
07-01 361.38
07-02 360.77
07-03 346.08
07-04 324.75
07-05 330.14
07-06 330.71
07-07 329.77
07-08 324.38
07-09 299.62
07-10 347.93
07-11 386.83
07-12 368.75
07-13 313.42
07-14 344.64
07-15 349.85
07-16 332.44
07-17 370.7
07-18 387.73
07-19 341.0
07-20 302.48
07-21 267.68
07-22 234.04
07-23 237.19
07-24 299.12
07-25 252.18
07-26 233.9
07-27 206.17
07-28 209.08
07-29 197.45
07-30 201.54
07-31 190.09
08-01 160.77
08-02 157.22
08-03 154.41
08-04 147.49
08-05 154.94
08-06 174.77
08-07 161.68
08-08 172.38
08-09 169.77
08-10 164.92
08-11 154.96
08-12 163.15
08-13 154.13
08-14 152.26
08-15 139.45
08-16 256.83
08-17 279.31
08-18 258.09
08-19 265.78
08-20 228.5
08-21 198.14
08-22 188.57
08-23 184.82
08-24 181.08
08-25 168.45
08-26 144.58
08-27 136.41
08-28 139.21
08-29 175.53
08-30 182.14
08-31 147.05
09-01 147.53
09-02 184.89
09-03 304.25
09-04 267.63
09-05 261.96
09-06 228.1
09-07 266.07
09-08 279.47
09-09 354.9
09-10 304.27
09-11 284.88
09-12 252.8
09-13 227.27
09-14 213.96
09-15 186.72
09-16 170.02
09-17 162.92
09-18 153.26
09-19 169.44
09-20 175.42
09-21 174.76
09-22 170.51
09-23 167.22
09-24 155.14
09-25 185.68
09-26 232.34
09-27 255.75
09-28 244.87
09-29 236.42
09-30 258.18
10-01 264.44
10-02 242.62
10-03 243.07
10-04 226.16
10-05 273.77
10-06 237.01
10-07 235.49
10-08 231.77
10-09 201.07
10-10 197.92
10-11 194.4
10-12 202.97
10-13 251.42
10-14 243.59
10-15 265.67
10-16 228.23
10-17 263.46
10-18 273.38
10-19 264.58
10-20 220.25
10-21 318.25
10-22 347.54
10-23 349.08
10-24 313.01
10-25 267.58
10-26 256.15
10-27 277.86
10-28 380.85
10-29 368.14
10-30 475.54
10-31 442.08
11-01 562.08
11-02 556.5
11-03 462.67
11-04 446.0
11-05 405.69
11-06 367.67
11-07 349.75
11-08 341.25
11-09 313.77
11-10 339.42
11-11 347.54
11-12 356.62
11-13 362.38
11-14 441.86
11-15 461.86
11-16 448.36
11-17 468.23
11-18 492.83
11-19 445.08
11-20 422.08
11-21 399.93
11-22 425.85
11-23 399.0
11-24 438.62
11-25 477.08
11-26 499.46
11-27 575.83
11-28 586.92
11-29 556.43
11-30 526.5
12-01 553.92
12-02 633.0
12-03 624.0
12-04 632.33
12-05 610.58
12-06 629.45
12-07 594.0
12-08 689.15
12-09 807.92
12-10 842.0
12-11 872.58
12-12 833.15
12-13 790.85
12-14 813.36
12-15 857.27
12-16 803.64
12-17 802.8
12-18 817.0
12-19 955.55
12-20 930.1
12-21 936.89
12-22 781.55
12-23 777.08
12-24 802.23
12-25 934.82
12-26 957.45
12-27 899.73
12-28 833.2
12-29 899.89
12-30 817.67
12-31 909.91

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index