Water Testing Results
Summer 2009

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) comcast (dot) net.
Water Sampling Dates
Locations and Measurements 6/9/09 6/23/09 7/7/09 7/21/09 8/4/09 8/18/09 9/1/09 9/15/09

Souhegan River Sites
Ashburnham, Ma
Billy Ward Pond
N/A N/A 34 1 19 22
New Ipswich
River Road above Water Loom Pond
44 93 19 71 10 58
New Ipswich
Highbridge
63 58 14 14 21 41
Greenville
Above Greenville Mill Pond
44 96 35 46 23 56
Greenville
Downtown Greenville upstream of WWTP
N/A 125 54 39 40 13
Greenville
Green Bridge below Greenville WWTP
N/A 99 41 45 39 31
Wilton
Below the Horseshoe
28 68 25 135 N/A 36
Wilton
Downtown
99 99 33 N/A 56 71
Milford
Pine Valley Mill
45 74 28 54 64 78
Milford
Behind Hayward Field
105 142 49 75 72 120
Milford
Souhegan Valley Boys & Girls Club
117 186 65 105 73 201
Milford
Swing Bridge
N/A N/A N/A N/A 99 172
Milford
Behind Riverside Cemetery
114 143 72 102 44 178
Milford
Behind Lorden Plaza
N/A N/A N/A N/A 75 173
Amherst
Amherst Country Club
111 172 72 86 152 150
Amherst
Conservation land on Fairway Road
112 298 96 125 104 291
Amherst
Boston Post Road Canoeport
96 3458 N/A 105 105 93*
Merrimack
Indian Ledges, Davidson Road
44 236 76 46 80 148
Merrimack
Turkey Hill Bridge
69 276 81 74 124 117
Merrimack
West Chamberlain Rd.
76 N/A 80 93 N/A 101


Purgatory Brook Site

Lyndeborough/Mont Vernon


Merrimack River Sites

Manchester
Above Amoskeag Dam
8 50 N/A N/A N/A 20
Manchester
Arms Park
13 79 N/A N/A N/A 75
Manchester
Upstream of Piscataquag River
N/A N/A N/A N/A N/A N/A
Litchfield
Goffs Falls
N/A N/A 49 N/A 58 68
Merrimack
Depot Street
N/A N/A 32 N/A 51 64
Merrimack
Upstream of Souhegan River
N/A N/A N/A N/A 488 86
Merrimack
Thornton's Ferry Boat Ramp
N/A N/A N/A 37 105 133
Merrimack
Cromwells Falls
N/A
Nashua
Greeley Park Boat Ramp
14 73 56 28 54 83
Nashua
Taylors Falls Bridge
17 N/A 65 34 55 96
Nashua
Sagamore Bridge
19 N/A 72 517 63 107
Hudson
Pheasant Lane Mall
N/A N/A N/A N/A N/A N/A
Tyngsboro
Upstream of Tyngsboro Bridge
12 76 42 547 35 410
Upper Souhegan current/historic flow (CFS) 61/65 494/25 117/13 302/23
Lower Souhegan current/historic flow (CFS) 108/130 704/98 222/54 542/45
Merrimack current/historic flow (CFS) 2490/3660 8870/2580 4190/1780 14800/1760
Rainfall Rainy Drizzling
Air Temperature
Water Temperature: Merr.
                                Souh.


Nashua River Sites

Location 5/9/09 6/20/09
Pepperell, Ma
Covered Bridge
24 91
Pepperell, Ma
Canoe Launch
72 1300
Hollis
Runnels Bridge
39 115
Nashua
Mine Falls Park
55 28
Nashua
Canal Street
23 93
Brookline
Lancy Brook
N/A N/A
Brookline
Nissitisit River
N/A 31
West Hollis
Nissitisit River
N/A N/A
Mason
Walker Brook
28 579

Notes:
* sample tested from the Amherst Boston Post Road canoeport on Aug. 18th was too small for guaranteed accuracy

 


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