2007

The sources of the W&E water supply are three wells located off West Shore Road in Windham, NH.  Well # 3 is located 45 feet southwest of the pump house.  Well # 4 is located 107 feet south of the pump house.  Well # 6 is located 1,270 feet southwest of the pump house.  Treatment consists of manganese green sand filtration to remove iron and manganese, ion exchange to remove hardness from the water, chlorine addition to kill bacteria, and pH adjustment to aid in corrosion control and optimize iron and manganese removal.
W&E
EPA # 2542030
Inorganic Contaminants	Units	MCLG	MCL	Highest Level Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Nitrate as Nitrogen	ppm	10	10	0.36	n/a	2006	NO	Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits.
Fluoride	ppm	4	4	0.7	n/a	2006	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	0	80	19.0	11 - 19	2006	NO	By-product of drinking water chlorination.
Haloacetic Acids (HAA5)	ppb	0	60	2.7	n/a	2004	NO	By-product of drinking water chlorination.
Methyl-Tertiary-Butyl Ether (MtBE)	ppb	13	13	0.8	nd to 0.8	2006	NO	Gasoline additive
Volatile Organic Contaminants	Units	MRDLG	MRDL	Average Level  Detected	Range	Year	Violation Yes/No	Typical Source of Contaminant
Chlorine	ppm	4	4	0.39	0.2 to 0.6	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	5.7	nd - 5.7	2006	NO	Erosion of natural deposits
Combined Radium	pCi/L	0	5	1.1	nd - 1.1	2006	NO	Erosion of natural deposits
Uranium	ppb	0	30	13	2.4 - 13	2006	NO	Erosion of natural deposits
Radon	pCi/L	Not Regulated		787	n/a	2002	NO	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.
Inorganic Contaminants	Units	MCLG	AL	90th percentile sample value	# sites above AL	Year	Violation Yes/No	Typical Source of Contaminant
Lead	ppb	0	15	12.5	1 of 5	2006	NO	Corrosion of household plumbing system
Copper	ppm	1.3	1.3	0.29	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 # 3	6/10/05	5	5	2
Bedrock Well # 4	6/10/05	5	5	2
Bedrock Well # 6	Not available at this time
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