Muddy Brook runs along Williston’s western border forming the boundary to South Burlington. This 20.8-square mile watershed includes the Sucker Brook and occupies approximately 6,300 acres in Williston. The Muddy Brook watershed includes the large box stores in Taft Corners and Maple Tree Place. Muddy Brook appears on the Vermont 303(d) List of Waters as impaired for toxins, nutrients, and temperature. The town has just begun efforts to identify specific problem areas in the watershed, such as the head-cut that is making its way to Harvest Lane.

Currently, the Stream Team is monitoring three sites along Muddy Brook (one in Williston and two in South Burlington) with the help of volunteers. Water samples are being taken twice monthly throughout the summer and are tested for phosphorous, nitrogen, chloride, and turbidity.

Location Date Chloride (mg/L) Nitrogen, Total – Persulfate (mg/L) Phosphorus – Total (TP) (µg/L) Turbidity (NTU)
Muddy 10 9/1/2015 111.8 -- 68.1 13.8
Muddy 20 9/1/2015 104.5 -- 98 13.3
Muddy 30 9/1/2015 27.5 -- 165 12.3
Muddy 10 8/18/15 103.7 -- 77.1 6.63
Muddy 20 8/18/15 81.22 -- 114 11.2
Muddy 30 8/18/15 26.16 -- 151 8.26
Muddy 10 8/4/2015 70.23 -- 80.2 8.98
Muddy 20 8/4/2015 61.75 -- 105 10.8
Muddy 30 8/4/2015 26.28 -- 110 8.15
Muddy 10 7/21/2015 54.05 -- 86.7 15
Muddy 20 7/21/2015 49.3 -- 86 10.7
Muddy 30 7/21/2015 23.9 -- 98.4 6.73
Muddy 10 7/7/2015 58.56 -- 66.4 11.1
Muddy 20 7/7/2015 53.23 -- 57.4 8.38
Muddy 30 7/7/2015 23.91 -- 56.7 4.57
Muddy 10 6/23/2015 65.03 -- 96.5 30.8
Muddy 20 6/23/2015 65.1 -- 72.3 15.9
Muddy 30 6/23/2015 25.1 -- 58.9 6.72
Muddy 10 8/19/2014 129 -- 53.6 5.46
Muddy 20 8/19/2014 105 -- 82.9 9.95
Muddy 30 8/19/2014 31.2 -- 111 9.41
Muddy 10 8/5/2014 114 -- 55.5 5.78
Muddy 20 8/5/2014 92.5 -- 93.8 11.2
Muddy 30 8/5/2014 27.2 -- 120 11.5
Muddy 10 7/22/2014 102 -- 49.9 4.21
Muddy 20 7/22/2014 78 -- 102 8.28
Muddy 30 7/22/2014 24.4 -- 140 6.33
Muddy 10 7/8/2014 75.9 -- 61.6 6.43
Muddy 20 7/8/2014 67.3 -- 87.3 11.5
Muddy 30 7/8/2014 24.8 -- 89.5 6.14
Muddy 20 10/6/2013 79.2 0.81 84.9 14.1
Muddy 20 9/10/2013 71 0.74 104 15.2
Muddy 10 8/27/13 109.00 1.04 54.40 4.79
Muddy 20 8/27/13 89.3 0.94 82.20 7.73
Muddy 30 8/27/13 21.50 1.32 103.00 6.54
Muddy 10 8/13/13 79.30 1.12 72.00 3.55
Muddy 20 8/13/13 66.50 1.01 107.00 5.46
Muddy 30 8/13/13 17.70 1.38 114.00 3.15
Muddy 10 8/07/13 83.70 1.15 72.90 3.75
Muddy 20 7/23/13 86.5 1.44 107.00 7.32
Muddy 30 7/23/13 16.40 1.68 234.00 3.54
Muddy 10 7/09/13 33.20 1.30 176.00 19.40
Muddy 20 7/09/13 15.6 1.45 172.00 7.42
Muddy 30 7/09/13 30.4 1.39 181 15.70
Muddy 10 6/25/2013 31.40 0.87 339 115
Muddy 30 6/25/13 11.50 0.7 112 18.9
Muddy 10 9/11/12 126 0.76 39.3 4.58
Muddy 20 9/11/2012 133 0.62 73.3 11.2
Muddy 30 9/11/2012 28.4 1.17 97.9 7.84
Muddy 10 8/21/2012 140 1.09 43 6.6
Muddy 20 8/21/2012 121 1.09 92.7 10.5
Muddy 30 8/21/2012 23.3 1.81 139 11
Muddy 10 8/7/2012 93 1.24 71.9 6.92
Muddy 20 8/7/2012 76.1 1.29 134 10.3
Muddy 30 8/7/2012 24.3 2.75 266 7.54
Muddy 10 7/24/2012 107 0.72 190 53.7
Muddy 20 7/24/2012 76.4 0.8 182 43.3
Muddy 30 7/24/2012 21.3 0.7 139 30.2
Muddy 10 7/10/2012 101 0.74 46 4.81
Muddy 20 7/10/2012 77.9 0.71 82.5 11.4
Muddy 30 7/10/2012 22 0.77 78.6 5.39
Average 2012 78.05 1.08 111.68 15.53
Average 2013 62 0.83 164.18 28.64
Average 2014 72.61 --  87.26 8.02
Average 2015 57.3 --  91.54 11.30

We've also been monitoring Muddy Brook during storm events. The results below indicate the water quality during two rain storms this summer.

Location Date Chloride (mg/L) Nitrogen, Total – Persulfate (mg/L) Phosphorus – Digested (ug P/L) TSS (mg/L) Turbidity (NTU)
Muddy 20 8/11/15 66.26 - 103 - 11.6
Muddy 20 8/12/12 135.00 0.95 120.00 24.00 -
Muddy 20 8/28/12 143.00 0.84 73.20 5.47 -