| Glen
Ridge |
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EPA # 0612070 |
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| Inorganic Contaminants |
Date(s)
Collected |
Highest
Detect |
Range
Detected |
MCL or MRDL |
MCLG or MRDLG |
Violation
Yes/No |
Typical Source of Contaminant |
| Fluoride (ppm) |
11/12/09 |
0.23 |
N/A |
4 |
4 |
No |
Erosion of natural deposits |
| Nitrate
as Nitrogen (ppm |
10/28/10 |
0.23 |
N/A |
10 |
10 |
No |
Runoff from fertilizer use; leaching from
septic tanks, sewage; erosion of natural deposits. |
| Sodium (ppm) |
11/12/09 |
20.5 |
N/A |
Not Regulated |
N/A |
Natural sources; runoff from use as salt on
roadways; by-product of treatment process |
| Volatile Organic
Contaminants |
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| Chlorine (ppm) |
2010 |
0.4 Avg |
0.15 - 0.6 |
4 |
4 |
No |
Water additive used to control microbes |
| Total
Trihalomethanes (ppb) |
8/9/10 |
2.3 |
N/A |
80 |
0 |
No |
By-product of drinking water chlorination |
| Radiological
Contaminants |
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| Compliance Gross Alpha
(pCi/L) |
2010 |
7.7 |
N/A |
15 |
0 |
No |
Erosion of natural deposits |
| Radium
226 & 228 (pCi/L) |
2005 |
0.7 |
N/A |
5 |
0 |
No |
Erosion of natural deposits |
| Uranium
(ppb) |
2010 |
13.9 RAA |
10.6 - 19 |
30 |
0 |
No |
Erosion of natural deposits |
| Radon
(pCi/L) |
2010 |
11,600 |
7,040 - 11,600 |
Not Regulated |
N/A |
Erosion of natural deposits |
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Date(s)
Collected |
90th
Percentile |
Action Level |
MCLG |
# of Sites
Sampled |
# Sites Above
Action Level |
Violation
Yes/No |
Typical Source of Contaminant |
| Lead (ppb) |
7/21/09 |
8 |
15 |
0 |
9 |
0 |
No |
Corrosion of household plumbing system |
| Copper
(ppm) |
7/21/09 |
0.60 |
1.3 |
1.3 |
9 |
0 |
No |
Corrosion of household plumbing system |
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| What is the
source of my drinking water? |
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| The sources of the Glen Ridge water supply are two wells and the
Glen Ridge Pump House located on Sheldon Road in Derry, NH. Well # 1 is located 240' southeast of the
pump house. Well # 2 is located 200'
northeast of the pump house. Treatment
consists of uranium removal, chlorine addition for disinfection, phosphate addition for corrosion control
and iron and manganese sequestration, and aeration to remove radon. |
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| Source Water
Assessment Summary |
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Summary of Susceptibility Factors |
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| Source
Name |
Date |
Low |
Med |
High |
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| Bedrock
Well # 1 |
11/3/00 |
8 |
3 |
1 |
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| Bedrock
Well # 2 |
11/3/00 |
8 |
3 |
1 |
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| The complete Assessment Report is available for
review. For more information call Gary
Tetley at 800-553-5191 ext. 2378 or visit NH Department of Environmental
Services Drinking Water and Groundwater Bureau web site at http://www.des.nh.gov/organization/divisions/water/dwgb/dwspp/reports/index.htm |
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