| Hi
& Lo Estates |
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EPA # 0612140 |
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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 |
| Barium
(ppm) |
11/12/09 |
0.046 |
N/A |
2 |
2 |
No |
Erosion of natural deposits |
| Fluoride
(ppm) |
11/12/09 |
0.33 |
N/A |
4 |
4 |
No |
Erosion of natural deposits |
| Nitrate
as Nitrogen (ppm |
10/27/10 |
0.21 |
4.88 - 5.14 |
10 |
10 |
No |
Runoff from fertilizer use; leaching from
septic tanks, sewage; erosion of natural deposits. |
| Sodium (ppm) |
11/12/09 |
24.0 |
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 |
0.51 Avg |
0.3 - 0.7 |
4 |
4 |
No |
Water additive used to control microbes |
| Methyl-Tertiary-Butyl
Ether (MtBE) (ppb) |
10/27/10 |
0.5 |
N/A |
13 |
13 |
No |
Gasoline additive |
| Total
Trihalomethanes (ppb) |
8/24/10 10/27/10 |
7.1 |
6.4 - 7.1 |
80 |
0 |
No |
By-product of drinking water chlorination |
| Haloacetic
Acids (ppb) |
9/14/10 |
1.4 |
N/A |
60 |
0 |
No |
By-product of drinking water chlorination |
| Radiological
Contaminants |
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| Compliance Gross Alpha
(pCi/L) |
2006 |
4.0 |
nd - 4.0 |
15 |
0 |
No |
Erosion of natural deposits |
| Radium
226 & 228 (pCi/L) |
2006 |
0.9 |
nd - 0.9 |
5 |
0 |
No |
Erosion of natural deposits |
| Uranium
(ppb) |
2006 |
2.2 |
nd - 2.2 |
30 |
0 |
No |
Erosion of natural deposits |
| Radon
(pCi/L) |
4/5/10 |
2,760 |
N/A |
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) |
7/17/09 |
< 5 |
15 |
0 |
7 |
0 |
No |
Corrosion of household plumbing system |
| Copper
(ppm) |
7/17/09 |
0.316 |
1.3 |
1.3 |
7 |
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 Hi & Lo Estates water supply are two
wells located between Taryn Road and Island Pond Road in Derry, NH. Well # 2 is located 100 feet northwest of
the pump house. Well # 4 is located
334 feet northwest of the pump house.
Treatment consists of greensand filtration to remove iron and
manganese, chlorine addition to disinfect the water, and phosphate addition
to aid in corrosion control and sequester iron and manganese. |
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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 # 2 |
6/10/05 |
7 |
3 |
2 |
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| Bedrock
Well # 4 |
6/10/05 |
7 |
3 |
2 |
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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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