2009 Sampling Summary - Substances Detected
Parameter
Highest Level Allowed
EPA's MCL
Ideal Goals
EPA's MCLG
Potential
Sources
Highest Level Detected in 2009
Ranges of Levels Detected in 2009
Meets Standard
Regulated at the Surface Water Source
Turbidity
Treatment Technique
5 NTU
N/A
Soil runoff
3.21 NTUs
0.42 - NTUs
Yes
Regulated at the Groundwater Sources
Arsenic
10 ppb
0
Erosion of natural deposits
4 ppb
0 - 4 ppb
Yes
Nitrate
10 ppb
0
Fertilizer use
0.8 ppb
0 - 0.8 ppb
Yes
Radium 228
5 pCi/l
0
Erosion of natural deposits
2.3
0 - 2.3
Yes
Regulated in the Distribution System
Total coliform
Presence of coliform in less than 5% of monthly samples
0
Naturally occurs in the environment
1.1%*
0 - 1.1%*
Yes
Trihalomethanes
80 ppb
N/A
By-product of drinking water chlorination
43.1 ppb annual average
0 - 58.8 ppb
Yes
Haloacetic acids
60 ppb
N/A
By-product of drinking water chlorination
5.2 ppb annual average
0 - 11.5 ppb
Yes
Chlorine
4 ppm
4 ppm
Water additive used to control microbes
0.64 ppm
annual average
0.01 - 1.47 ppm
Yes
Regulated at the Customer Tap
Lead
Most recently sampled in 2008
Action Level = 15 ppb
0
Household plumbing
4 ppb
90th percentile
No sample sites exceeded the Action Level
Yes
Copper
Most recently sampled in 2008
Action Level = 1300 ppb
0
Household plumbing
80 ppb
90th percentile
No sample sites exceeded the Action Level
Yes
*899 samples were taken in 2009, and only one had coliform present.