Definitions:

MCLG: Maximum Contaminant Level Goal, or the level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety. MCL: Maximum Contaminant Level, or the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.

AL: Action Level, or the concentration of a contaminant which, when exceeded, triggers treatment or other requirements which a water system must follow.. TT: Treatment Technique, or a required process intended to reduce the level of a contaminant in drinking water. 90th percentile: For lead and Copper testing. 10% of test results are above this level and 90% are below this level. Level Found: is the average of all test results for a particular contaminant.

Range of Detections: Shows the lowest and highest levels found during a testing period, if only one sample was taken, then this number equals the Level Found. MRLDG: Maximum Residual Disinfectant Level Goal, or the level of a drinking water disinfectant below which there is no known or expected risk to health. MRDL: Maximum Residual Disinfectant Level, or the highest level of a disinfectant allowed in drinking water.

Abbreviations:

PPB: parts per billion or micrograms per liter, ppm: parts per million or milligrams per liter, n/a: not applicable.

NTU: Nephelometric Turbidity Unit, used to measure cloudiness in drinking water. MFL: million fibers per liter, used to measure asbestos concentration, nd: not detectable at testing limits.

The state has reduced monitoring requirements for certain contaminants to less often than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. Records with a sample year more than one year old are still considered representative.

Regulated Contaminants

Regulated Contaminants	Collection Date	Highest Value	Range	Unit	MCL	MCLG	Typical Source
BARIUM	8/21/2008	0.237	0.0976 -0.237	ppm	2	2	Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits
FLUORIDE	8/21/2008	0.15	0.1-0.15	ppm	4.0	4	Natural deposits; Water additive which promotes strong teeth.
NITRATE+NITRITE (ASN)	1/29/2008	0.42	0.12-0.42	ppm	10	10	Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits

Lead and Copper	Date	90™ Percentile	Range	Unit	AL	Sites Over AL	Typical Source
COPPER	2008-2010	0.0965	0.00553 -0.175	ppm	1.3	0	Corrosion of household plumbing systems
LEAD	2008-2010	2.6	1.09-4.4	ppb	15	0	Corrosion of household plumbing systems

Microbiological	Result	MCL	MCLG	Typical Source
COLIFORM, TOTAL (TCR)	In the month of November, 5 sample(s) returned as positive	MCL: Systems that Collect Less Than 40 Samples per Month - No more than 1 positive monthly sample	0	Naturally present in the environment

Radionuclides	Collection Date	Highest Value	Range	Unit	MCL	MCLG	Typical Source
GROSS ALPHA PARTICLE ACTIVITY, TOTAL	4/28/2008	1.8	1.8	pCi/1			Erosion of natural deposits

Wednesday, May 13, 2009