2007

The current source of the Green Hills water supply is the town water supply for Raymond that consists of three gravel pack wells.  All three wells are located between the Cammett Recreation Area and the Lamprey River behind the Town's Safety Complex.  The well site and well #1 were purchased in 1978 and produces over 200 gallons per minute.  Well # 2 was developed in 1988 and produces over 350 gallons per minute.  Well # 3 was developed in 2004 and produces approximately 300 gallons per minute.  Treatment consist of aeration to reduce the level of Radon, manganese green sand filtration to remove iron and manganese, pH adjustment to reduce corrosion, and chlorine addition to kill bacteria.
GREEN HILLS
EPA # 1973030
Inorganic Contaminants	Units	MCLG	MCL	Highest Level Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Barium	ppm	2	2	0.0097	n/a	2005	NO	Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
Nitrate as Nitrogen	ppm	10	10	1.5	0.22 - 1.5	2006	NO	Runoff from fertilizer use; leaching from septic tanks, sewage; 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	0.04	0 of 10	2005	NO	Corrosion of household plumbing system
Radiological Contaminants	Units	MCLG	MCL	Highest Level Detected	Range	Year	Violation Yes/No	Typical Source of Contamination
Gross Alpha (Compliance)	pCi/L	0	15	0.7	0.0 - 0.7	2005	NO	Erosion of natural deposits
Radium 226 & 228	pCi/L	0	5	0.7	0.0 - 0.7	2005	NO	Erosion of natural deposits
Uranium	ppb	0	30	0.4	0.2 - 0.4	2005	NO	Erosion of natural deposits
Radon	pCi/L	Not Regulated		5,000	3,000 to 5,000	2005	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.
Volatile Organic Contaminants	Units	MCLG	MCL	Level  Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Total Trihalomethanes (TTHMs)	ppb	0	80	9.3	n/a	2007	NO	By-product of drinking water chlorination.
Haloacetic Acids (HAA5)	ppb	0	60	3.6	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	0.17	nd - 0.35	2006	NO	Water additive used to control microbes
Source Assessment Information
		Summary of Susceptibility Factors
Source Name	Date	Low	Med	High
Gravel Pack Well # 1	########	9	2	1
Gravel Pack Well # 2	########	9	2	1
Gravel Pack Well # 3	########	9	2	1
The complete Assessment Report is available for inspection at the Town of Raymond's Public Works Office.  For more information call 603-895-4657 or visit NH DES's Drinking Water Source Assessment Program web site at www.des.state.nh.us/dwspp