Water Testing Results
Summer 2006

Merrimack and Souhegan Rivers
E-Coli Bacteria in Colonies per 100 ml. of Sample

Bacteria levels below 88 colonies per 100 ml. are considered safe for public swimming areas. Therefore levels above 88 colonies per 100 ml. are colored in red.

CFS: The water flow volume in the rivers is measured in Cubic Feet per Second.

TNC: To numerous to count.

NA: Entries labeled NA are not available. The e-coli counts are either not available because of a contaminated, lost, or destroyed sample, or because no one collected the water sample. There may be no volunteer for a particular site, or a volunteer might have been out of town or unable to collect the sample. If you wish to help reduce the number of N/A entries and can collect a few water samples on a Tuesday morning, call George May at 883-3409 or email georgemay (at) msn (dot) com.
Water Sampling Dates
Locations and Measurements 6/13/06 6/27/06 7/11/06 7/25/06 8/8/06 8/22/06 9/5/06 9/19/06

Souhegan River Sites
Ashburnham, Ma
Billy Ward Pond
<1 2 <2 <2 <1 NA <2 <2
New Ipswich
River Road above Water Loom Pond
2 49 <2 20 96 74 6 58
New Ipswich
Highbridge
4 8 <2 2 <2 215 6 <2
Greenville
Above Greenville Mill Pond
8 30 <2 <2 2 NA <2 162
Greenville
Downtown Greenville upstream of WWTP
NA NA NA NA NA NA NA NA
Greenville
Green Bridge below Greenville WWTP
22 74 38 12 6 130 2 <2
Wilton
Below the Horseshoe
NA 32 NA 80 34 24 NA 62
Wilton
Downtown
<1 50 NA 14 <2 NA <2 <2
Milford
Pine Valley Mill
10 28 230 5 55 530 90 132
Milford
Behind Hayward Field
140 31 180 10 90 490 140 105
Milford
Souhegan Valley Boys & Girls Club
80 188 210 128 246 95 160 130
Milford
Swing Bridge
60 292 130 50 136 125 190 165
Milford
Behind Riverside Cemetery
20 212 230 120 180 646 250 <2
Milford
Behind Lorden Plaza
2 264 280 2 98 600 24 2
Amherst
Amherst Country Club
60 580 NA 80 133 546 270 240
Amherst
Conservation land on Fairway Road
150 440 290 90 233 460 280 180
Amherst
Boston Post Road Canoeport
NA NA 190 120 140 666 6 6
Merrimack
Indian Ledges, Davidson Road
90 296 NA 100 133 566 200 60
Merrimack
Turkey Hill Bridge
30 380 NA 80 6 NA 132 NA
Merrimack
East Chamberlain Rd.
NA NA NA NA NA 278 108 16


Purgatory Brook Site

Lyndeborough/Mont Vernon
NA NA NA <2 8 20 NA NA


Merrimack River Sites

Manchester
Above Amoskeag Dam
6 24 <1 264 2 26 6 2
Manchester
Arms Park
30 68 84 342 36 34 42 20
Manchester
Upstream of Piscataquag River
NA NA NA NA NA NA NA NA
Litchfield
Goffs Falls
100 106 2 NA 56 176 34 12
Merrimack
Depot Street
NA 38 2 362 NA 174 70 NA
Merrimack
Upstream of Souhegan River
90 144 2 NA NA NA 70 14
Merrimack
Thornton's Ferry
NA NA NA 22 16 145 4 12
Nashua
Greeley Park
NA 38 <2 26 6 NA 11 <2
Nashua
Taylors Falls Bridge
56 55 <2 <2 28 160 22 10
Nashua
Sagamore Bridge
50 16 2 18 20 74 8 10
Hudson
Pheasant Lane Mall
NA NA NA NA NA NA NA NA
Tyngsboro
Upstream of Tyngsboro Bridge
NA NA NA NA NA NA NA NA


Nashua River Sites

Location 5/27/06 6/17/06 7/15/06 8/19/06 9/16/06
Pepperell, Ma
Covered Bridge
24 126 195 21 29
Pepperell, Ma
Canoe Launch
NA 137 299 30 46
Hollis
Runnels Bridge
17 124 150 26 37
Nashua
Mine Falls Park
549 99 293 2 38
Nashua
Canal Street
70 130 108 43 46
Brookline
Lancy Brook
90 6 96 11 2
Brookline
Nissitisit River
2 9 62 6 3
West Hollis
Nissitisit River
36 32 138 127 110
Mason
Walker Brook
21 106 298 6 16
Souhegan current/historic flow (CFS) 95/41 168/41 64/42
Merrimack current/historic flow (CFS) 3740/1440 3510/1500 1500/1500
Rainfall
Air Temperature 17 oC/62 oF
Water Temperature: Merr.
                                Souh.
16 oC/61 oF
16 oC/61 oF

Notes:

 


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