Page 3 2006 Annual Drinking Water Quality Report
Inorganic Contaminants
|
Year or Range
|
Contaminant
|
Average Level
|
Minimum Level
|
Maximum Level
|
MCL
|
MCLG
|
Unit of Measure
|
Source of Contaminant
|
|
2006
|
Barium
|
0.082
|
0.082
|
0.082
|
2
|
2
|
ppm
|
Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits.
|
|
2003
|
Fluoride
|
0.71
|
0.71
|
0.71
|
4
|
4
|
ppm
|
Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories.
|
|
2006
|
Nitrate
|
0.04
|
0.04
|
0.04
|
10
|
10
|
ppm
|
Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits.
|
|
2006
|
Combined Radium
226 & 228
|
3.1
|
3.1
|
3.1
|
5
|
0
|
pCi/L
|
Erosion of natural deposits.
|
|
2003
|
Gross beta emitters
|
13.8
|
13.8
|
13.8
|
50
|
0
|
pCi/L
|
Decay of natural and man-made deposits.
|
|
2003
|
Gross alpha
|
10.8
|
10.8
|
10.8
|
15
|
0
|
pCi/L
|
Erosion of natural deposits.
|
Organic Contaminants TESTING WAIVED, NOT REPORTED OR NONE DETECTED
Maximum Residual Disinfectant Level
Systems must complete and submit disinfection data on the Disinfection Level Quarterly Operating Report (DLQOR). On the CCR report, the system must provide disinfectant type, minimum, maximum and average levels.
|
Year
|
Disinfectant
|
Average Level
|
Minimum Level
|
Maximum Level
|
MRDL
|
MRDLG
|
Unit of Measure
|
Source of Chemical
|
|
2006
|
Disinfectant used
|
Average Level of 2006
quarterly averages
|
Minimum result
single sample
|
Maximum result
single sample
|
4.0
|
<4.0
|
ppm
|
Disinfectant used to control microbes
|
Disinfection Byproducts
|
Year
|
Contaminant
|
Average Level
|
Minimum Level
|
Maximum Level
|
MCL
|
Unit of Measure
|
Source of Contaminant
|
|
2003
|
Total Trihalomethanes
|
1.2
|
1.2
|
1.2
|
80
|
ppb
|
Byproduct of drinking water disinfection
|
Unregulated Contaminants NOT REPORTED OR NONE DETECTED
Lead and Copper
|
Year
|
Contaminant
|
The 90th
Percentile
|
Number of Sites
Exceeding Action Level
|
Action Level
|
Unit of Measure
|
Source of Contaminant
|
|
1999
|
Lead
|
3.5
|
1
|
15
|
ppb
|
Corrosion of household plumbing systems; erosion of natural deposits
|
|
1999
|
Copper
|
0.112
|
0
|
1.3
|
ppm
|
Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives
|
Turbidity NOT REQUIRED
Total Coliform REPORTED MONTHLY TESTS FOUND NO COLIFORM BACTERIA.
Fecal Coliform REPORTED MONTHLY TESTS FOUND NO FECAL COLIFORM BACTERIA.
2460027 Page 3 2006 Annual Drinking Water Quality Report
  
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High Gabriel Water
Supply Corporation
|
Contact Information
P.O. Box 2799
Cedar Park, TX 78630
Office: 512-259-3888
Emergencies: 512-589-7031
Email: billing@texaswater.net
www.highgabrielwsc.com
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