2007

The source for the Sweet Hill water supply is one bedrock well which is 708 feet deep and yields 26 gallons per minute.  The pump station located off Sweet Hill Road in Plaistow, NH.  Treatment consist of chlorine to kill bacteria and aeration to remove radon.
SWEET HILL
EPA # 1932200
Inorganic Contaminants	Units	MCLG	MCL	Level Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Barium	ppm	2	2	0.038	n/a	2004	NO	Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
Fluoride	ppm	4	4	0.29	n/a	2004	NO	Erosion of natural deposits
Inorganic Contaminants	Units	MCLG	AL	90th percentile sample value	# sites above AL	Year	Violation Yes/No	Typical Source of Contaminant
Copper	ppm	1.3	1.3	0.1	0	2005	NO	Corrosion of household plumbing system
Volatile Organic Contaminants	Units	MCLG	MCL	Level  Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Total Trihalomethanes (TTHMs)	ppb	n /a	80	11	n/a	2006	NO	By-product of drinking water chlorination.
Haloacetic Acids (HAA5)	ppb	n/a	60	1.3	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	0.35	0.28 to 0.5	2006	NO	Water additive used to control microbes
Radiological Contaminants	Units	MCLG	MCL	Level Detected	Range	Year	Violation Yes/No	Typical Source of Comtamination
Gross Alpha (Compliance)	pCi/L	0	15	1.3	nd - 1.3	2006	NO	Erosion of natural deposits
Combined Radium	pCi/L	0	5	1.5	nd - 1.5	2006	NO	Erosion of natural deposits
Uranium	ppb	0	30	1	nd - 1.0	2006	NO	Erosion of natural deposits
Radon	pCi/L	Not Regulated		928	641 - 928	2006	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.
Source Assessment Information
		Summary of Susceptibility Factors
Source Name	Date	Low	Med	High
Bedrock Well # 1	12/18/01	9	1	2
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