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Water Quality Data Table
 
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 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, if 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.
-"<": a symbol which means less than. A result of <5 means that the lowest level that could be detected was 5, and the contaminant in that sample was not detected. - NA: Not Applicable or no standard set.

Abbreviations: ppm: Parts per Million or Milligrams per Liter (mg/L) are units of measure for concentration of a contaminant. A part per million corresponds to one second in a little over 11.5 days. - ppb: Parts per Billion or Micrograms per Liter (µg/L) are units of measure for concentration of a contaminant. A part per billion corresponds to one second in 31.7 years.

   
   
 

Contaminants (Units)

 

MCLG

MCL

Level Found

Range of Detection

Violation

 Sample Year

Typical Source of Contaminants

Microbiological Contaminants

 

 

 

 

 

 

 

Turbidity

NA

TT

0.35

0.03 – 0.35

NONE

2007

Soil runoff

Turbidity (% samples meeting Standards)

NA

TT

99.4%

99.4% - 100%

NONE

2007

 

Inorganic Contaminants

 

 

 

 

 

 

 

Fluoride (ppm)

4

4

1.04

0.79 – 1.29

NONE

2007

Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer & aluminum factories

Lead (ppb)

       0

   AL =15

   <5.0

  <5.0-13.0

  NONE

   2006

Corrosion of household plumbing systems

Zero out of thirty samples was found to have lead in excess of the Action Level of 15 ppb.

Copper (ppm)

1.3

AL =1.3

0.045

<0.005 – 0.544

 NONE

   2006

Corrosion of household plumbing; Erosion of natural deposits; leaching from wood preservatives

Zero out of thirty samples was found to have copper levels in excess of the Action Level of 1.3 ppm.

Barium (ppm)

2

2

0.015

NA

NONE

2007

Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits

Nitrate (ppm)

10

10

2.07

1.01 – 2.07

NONE

2007

Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits

Synthetic Organic Contaminants including Pesticides and Herbicides

 

 

 

 

 

 

 

Atrazine (ppb)

3

3

0.59

<0.30 – 2.4

NONE

2007

Runoff from herbicide used on row crops

Simazine (ppb)

4

4

0.26

<0.40 – 0.81

NONE

2007

Herbicide runoff

Volatile Organic Contaminants

 

 

 

 

 

 

 

TTHMs (Total  trihalomethanes) (ppb)

NA

80

54.5

19.7 - 109

NONE

2007

By-product of drinking water chlorination

Haloacetic Acids (ppb)

NA

60

19.5

<6.0 – 34.0

NONE

2007

By-product of drinking water chlorination

Unregulated Contaminants

 

 

 

 

 

 

 

Bromodichloromethane (ppb)

NA

NA

16.6

3.8 – 16.6

NONE

2007

Component of Total Trihalomethane

Dibromochloromethane (ppb)

NA

NA

5.0

0.8 – 5.0

NONE

2007

Component of Total Trihalomethane

Chloroform (ppb)

NA

NA

90.3

15.1 – 90.3

NONE

2007

Component of Total Trihalomethane

Dichloroacetic Acid (ppb)

NA

NA

26.3

8.8 – 26.3

NONE

2007

Component of Haloacetic Acids

Trichloroacetic Acid (ppb)

NA

NA

8.8

<1.0 – 8.8

NONE

2007

Component of Haloacetic Acids

Monochloroacetic Acid (ppb)

NA

NA

2.5

<2.0 – 2.5

NONE

2007

Component of Haloacetic Acids

Bromochloroacetic Acid (ppb)

NA

NA

6.1

<1.0 – 6.1

NONE

2007

Component of Haloacetic Acids

Total Organic Carbon (ppb)

NA

NA

3.5

1.3 – 3.5

NONE

2007

Naturally occurring Organic material in water

Residual Disinfectants  

Chlorine (ppm)

MRDL=4

MRDLG=4

1.16

1.01 –1.39

NONE

2007

Water additive used to control microbes

 
 
 
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