Water Testing Results
Summer 2007

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 6/12/06 6/26/06 7/10/06 7/24/06 8/7/06 8/21/06 9/4/06 9/18/06

Souhegan River Sites
Ashburnham, Ma
Billy Ward Pond
2 2 9 4 114 98 0 N/A
New Ipswich
River Road above Water Loom Pond
28 26 1299 96 71 113 4 N/A
New Ipswich
Highbridge
10 <2 344 576 186 686 0 N/A
Greenville
Above Greenville Mill Pond
N/A N/A N/A N/A N/A N/A N/A N/A
Greenville
Downtown Greenville upstream of WWTP
N/A N/A 248 21 365 30 N/A N/A
Greenville
Green Bridge below Greenville WWTP
26 124 387 35 410 20 2 N/A
Wilton
Below the Horseshoe
N/A N/A N/A 20 24 15 35 N/A
Wilton
Downtown
6 N/A 2419 40 71 47 58 N/A
Milford
Pine Valley Mill
108 192 2419 60 52 20 44 38
Milford
Behind Hayward Field
N/A N/A 1840 80 120 80 102 28
Milford
Souhegan Valley Boys & Girls Club
300 230 2300 140 92 52 50 88
Milford
Swing Bridge
180 190 2100 120 N/A 92 70 N/A
Milford
Behind Riverside Cemetery
200 8 3260 40 168 116 74 52
Milford
Behind Lorden Plaza
245 400 & 460 3400 40 160 72 N/A N/A
Amherst
Amherst Country Club
200 110 2900 40 N/A 80 220 56
Amherst
Conservation land on Fairway Road
N/A N/A N/A N/A N/A N/A N/A N/A
Amherst
Boston Post Road Canoeport
205 90 3020 N/A 0 19 N/A 104
Merrimack
Indian Ledges, Davidson Road
38 296 242 22 0 16 28 N/A
Merrimack
Turkey Hill Bridge
66 < 2 547 2 0 N/A N/A N/A
Merrimack
West Chamberlain Rd.
32 N/A 2 4 0 N/A N/A N/A


Purgatory Brook Site

Lyndeborough/Mont Vernon
N/A N/A N/A N/A N/A N/A N/A N/A


Merrimack River Sites

Manchester
Above Amoskeag Dam
18 8 0 < 1 N/A 0 0 0
Manchester
Arms Park
76 10 10 < 1 N/A 3 2 14
Manchester
Upstream of Piscataquag River
N/A N/A N/A N/A N/A N/A N/A N/A
Litchfield
Goffs Falls
2 10 16 2 0 1 6 6
Merrimack
Depot Street
N/A N/A N/A N/A N/A 1 0 41
Merrimack
Upstream of Souhegan River
62 N/A < 1 N/A 0 0 N/A 1
Merrimack
Thornton's Ferry
66 2 36 < 1 0 N/A N/A N/A
Merrimack
Cromwells Falls
44 < 1 176 2 0 N/A N/A N/A
Nashua
Greeley Park
8 2 113 40 10 N/A 1 N/A
Nashua
Taylors Falls Bridge
N/A 4 261 42 12 7 18 N/A
Nashua
Sagamore Bridge
2 20 N/A N/A N/A 25 N/A N/A
Hudson
Pheasant Lane Mall
N/A N/A N/A N/A N/A N/A N/A N/A
Tyngsboro
Upstream of Tyngsboro Bridge
N/A N/A N/A N/A N/A N/A N/A N/A


Nashua River Sites

Location 6/16/06 7/21/06 8/18/06 9/15/06
Pepperell, Ma
Covered Bridge
N/A 276 34 111
Pepperell, Ma
Canoe Launch
N/A 63 53 61
Hollis
Runnels Bridge
40 228 26 82
Nashua
Mine Falls Park
20 51 10 23
Nashua
Canal Street
82 150 145 N/A
Brookline
Lancy Brook
32 116 14 32
Brookline
Nissitisit River
4 10 91 11
West Hollis
Nissitisit River
79 345 135 142
Mason
Walker Brook
24 411 14
Souhegan current/historic flow (CFS) 180/130 87/55 37/42 27/43 21/37
Merrimack current/historic flow (CFS) 4900/3700 3320/1419 1300/1510 1180/--
Rainfall
Air Temperature 17 oC/62 oF
Water Temperature: Merr.
                                Souh.
16 oC/61 oF
16 oC/61 oF

Notes:

 


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