2007

The sources of the Hubbard Hill water supply is one well located off Hubbard Hill Road in Derry, NH.  Well # 2 is located 75 feet north of the pump house.  Treatment consist of chlorine addition for disinfection and pH adjustment using sodium hydroxide to control corrosion.
HUBBARD HILL
EPA # 0612090
Inorganic Contaminants	Units	MCLG	MCL	Highest Level Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Fluoride	ppm	4	4	0.97	n/a	2005	NO	Erosion of natural deposits
Volatile Organic Contaminants	Units	MCLG	MCL	Highest Level Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Total Trihalomethanes (TTHMs)	ppb	n /a	80	4.2	n/a	2006	NO	By-product of drinking water chlorination.
Haloacetic Acids (HAA5)	ppb	n/a	60	7.0	n/a	2004	NO	By-product of drinking water chlorination.
Volatile Organic Contaminants	Units	MRDLG	MRDL	Average Level  Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Chlorine	ppm	4	4	0.32	0.1 - 0.4	2006	NO	Water additive used to control microbes
Radiological Contaminants	Units	MCLG	MCL	Highest Level Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Gross Alpha (Compliance)	pCi/L	0	15	3.3	nd - 3.3	2006	NO	Erosion of natural deposits
Combined Radium	pCi/L	0	5	1	nd - 1.0	2006	NO	Erosion of natural deposits
Uranium	ppb	0	30	4.6	2.4 - 4.6	2006	NO	Erosion of natural deposits
Radon	pCi/L	Not Regulated		733	n/a	2002	n/a	Erosion of natural deposits
Radon is a radioactive gas that you can't see, taste or smell.  It can move up through the ground and into a home through cracks and holes in the foundation.  Radon can also get into indoor air when released from tap water from showering, washing dishes, and other household activities.  It is a known human carcinogen.  Breathing radon can lead to lung cancer.  Drinking water containing radon may cause an increased risk of stomach cancer.  Presently EPA is reviewing a standard for radon in water.
Lead and Copper	Units	MCLG	AL	90th percentile sample value	# sites above AL	Year	Violation Yes/No	Typical Source of Contaminant
Lead	ppb	0	15	21.5	2 of 5	2006	YES	Corrosion of household plumbing system
Infants and young children are typically more vulnerable to lead in drinking water than the general population.  It is possible that lead levels at your home may be higher than at other homes in the community as a result of materials used in your home's plumbing.  If you are concerned about elevated lead levels in your home's water, you may wish to have your water tested and flush your tap for 30 seconds to two minutes before using tap water.  Additional information is available from the Safe Drinking Water Hotline (800-426-4791).  Infants and children who drink water containing lead in excess of the action level could experience delays in their physical or mental development.  Children could show slight deficits in attention span and learning abilities.  Adults who drink this water over may years could develop kidney problems or high blood pressure.  The most recent round of Lead samples taken in February of 2007 were found to contain no Lead.
Copper	ppm	1.3	1.3	0.1945	0 of 5	2006	NO	Corrosion of household plumbing system
Source Assessment Information
		Summary of Susceptibility Factors
Source Name	Date	Low	Med	High
Bedrock Well # 2	11/3/00	8	3	1
The complete Assessment Report is available for inspection.  For more information call Gary Tetley or visit NH DES's Drinking Water Source Assessment Program web site at www.des.state.nh.us/dwspp