Water Testing Results
Summer 2005

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 6/14/05 6/28/05 7/12/05 7/26/05 8/9/05 8/23/05 9/6/05 9/20/05

Souhegan River Sites
New Ipswich
River Road above Water Loom Pond
NA 50 43 48 8 24 12
New Ipswich
Highbridge
NA 90 36 102 48 44 56
Greenville
Above Greenville Mill Pond
NA 36 60 64 64 56 4
Greenville
Downtown Greenville upstream of WWTP
NA NA NA NA NA NA NA
Greenville
Green Bridge below Greenville WWTP
NA NA NA 28 152 44 12
Wilton
Below the Horseshoe
NA 35 40 52 260 NA 20
Wilton
Downtown
NA 216 92 NA 124 NA 52
Milford
Pine Valley Mill
80 340 140 NA 436 210 72
Milford
Behind Hayward Field
180 260 150 NA 200 125 152
Milford
Souhegan Valley Boys & Girls Club
310 100 160 215 236 185 96
Milford
Swing Bridge
490 260 230 NA 204 NA NA
Milford
Behind Riverside Cemetery
260 240 140 160 64 120 196
Milford
Behind Lorden Plaza
1420 280 196 205 100 95 120
Amherst
Amherst Country Club
1000 260 230 119 296 105 116
Amherst
Conservation land on Fairway Road
NA 320 240 NA 132 185 NA
Amherst
Boston Post Road Canoeport
120 240 160 211 164 210 136
Merrimack
Indian Ledges, Davidson Road
26 >800 NA 80 2 10 4
Merrimack
Turkey Hill Bridge
75 30 NA 116 42 NA NA
Merrimack
East Chamberlain Rd.
NA 36 NA NA NA NA NA


Purgatory Brook Site

Lyndeborough/Mont Vernon
120 NA 2 NA NA NA NA


Merrimack River Sites

Manchester
Above Amoskeag Dam
4 60 10 20 16 8 <10
Manchester
Arms Park
156 NA 14 108 2 0 12
Manchester
Upstream of Piscataquag River
45 20 29 52 82 10 12
Litchfield
Goffs Falls
22 10 98 88 28 10 12
Merrimack
Depot Street
NA NA NA 8 10 0 <4
Merrimack
Upstream of Souhegan River
169 30 74 8 NA NA 4
Merrimack
Thornton's Ferry
NA NA NA 16 26 19 20
Nashua
Greeley Park
1010 40 96 8 12 24 16
Nashua
Taylors Falls Bridge
890 44 132 36 20 48 28
Nashua
Sagamore Bridge
240 28 156 12 20 40 <4
Hudson
Sanders Parking Lot
NA NA NA NA NA NA NA
Tyngsboro
Upstream of Tyngsboro Bridge
NA NA 72 60 25 0 10
Souhegan current/historic flow (CFS) 228/140 106/91 256/65 100/50 52/38 47/42
Merrimack current/historic flow (CFS) 9000/3200 3780/2350 7350/1900 2000/1500 1500/1500 1520/1340
Rainfall
Air Temperature 17 oC/62 oF 17 oC/62 oF 13 oC/56 oF
Water Temperature: Merr.
                                Souh.
16 oC/61 oF
16 oC/61 oF
20 oC/68 oF
25 oC/77 oF
21 oC/70 oF
18 oC/64 oF

Notes:

 


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