Orange Water and Sewer Authority2004 Drinking Water Test Results Summary |
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|
Substance
and Unit Measurement |
Highest
Level Detected |
Range
Detected |
Highest
Level Allowed (MCL) |
Highest
Level Goal (MCLG) |
Major Source in Drinking Water |
|
Microbiological |
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|
Total Coliform Bacteria (percent) |
1 |
0 to 1 |
presence of coliform bacteria in greater than 5% of
the monthly samples |
0 |
Naturally
present in the environment |
|
|
E. coli Bacteria (percent) |
0 |
no range |
a
routine sample and a repeat sample are total coliform positive, and one is
also fecal coliform or E. coli positive |
0 |
Human and animal fecal waste |
|
|
Turbidity (NTU) |
0.32 and 99.95% of samples below 0.3 |
0.02 to 0.32 |
TT = 1.0 and 95% of samples below 0.3 |
0.3 |
A
measure of the cloudiness of water. It
may be caused by inorganic soil particles or fragments of organic matter that
can interfere with treatment. |
|
Radiological |
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|
Gross Alpha (pCi/l) |
BDL |
no range |
15 |
0 |
Erosion of natural deposits |
|
|
Gross Beta (pCi/L) |
BDL |
no range |
50 |
0 |
Decay of natural and man-made deposits |
|
|
Radium 226 (pCi/l) |
BDL |
no range |
3 |
0 |
Erosion of natural deposits |
|
|
Radium 228 (pCi/l) |
BDL |
no range |
2 |
0 |
Erosion of natural deposits |
|
|
Uranium (pCi/l) |
BDL |
no range |
20.1 |
0 |
Erosion of natural deposits |
|
Inorganics |
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|
Substance
and Unit Measurement |
Highest
Level Detected |
Range
Detected |
Highest
Level Allowed (MCL) |
Highest
Level Goal (MCLG) |
Major Source in Drinking Water |
|
|
Antimony (ppb) |
BDL |
no range |
6 |
6 |
Discharge
from petroleum refineries; fire retardants; ceramics; electronics; solder |
|
|
Arsenic (ppb) |
BDL |
no range |
10 |
0 |
Erosion
of natural deposits; runoff from orchards; runoff from glass and electronics
production wastes |
|
|
Asbestos (MFL) (last tested in 2002) |
BDL |
no range |
7 |
7 |
Decay
of asbestos-cement water mains; erosion of natural deposits Last
tested 9/93 |
|
|
Barium (ppm) |
BDL |
no range |
2 |
2 |
Discharge
of drilling wastes; discharge from metal refineries; erosion of natural
deposits |
|
|
Beryllium (ppb) |
BDL |
no range |
4 |
4 |
Discharge
from metal refineries and coal-burning factories; discharge from electrical,
aerospace, and defense industries |
|
|
Cadmium (ppb) |
BDL |
no range |
5 |
5 |
Corrosion
of galvanized pipes; erosion of natural deposits; discharge from metal
refineries; runoff from waste batteries and paints |
|
|
Chromium (ppb) |
BDL |
no range |
100 |
100 |
Discharge
from steel and pulp mills; erosion of natural deposits |
|
|
Copper (ppm) (last tested in 2002) |
0.160 (90th
percentile, with 0 sample sites above the action level) |
0.026 to 0.580 |
1.3 (action level) |
1.3 |
Corrosion
of household plumbing systems; erosion of natural deposits; leaching from
wood preservatives |
|
|
Cyanide (ppb) |
BDL |
no range |
200 |
200 |
Discharge
from steel/metal factories; discharge from plastic and fertilizer factories |
|
|
Fluoride (ppm) |
1.0 |
0.93 to 1.0 |
4 |
4 |
Erosion
of natural deposits; water additive which promotes strong teeth; discharge
from fertilizer and aluminum factories |
|
|
Lead (ppb) (last tested in 2002) |
4 (90th
percentile, with 1 sample site above the action level) |
BDL to 36 |
15 (action level) |
0.0 |
Corrosion
of household plumbing systems; erosion of natural deposits |
|
|
Mercury (ppb) |
BDL |
no range |
2 |
2 |
Erosion
of natural deposits; discharge from refineries and factories; runoff from
landfills; runoff from cropland |
|
|
Substance
and Unit Measurement |
Highest
Level Detected |
Range
Detected |
Highest
Level Allowed (MCL) |
Highest
Level Goal (MCLG) |
Major Source in Drinking Water |
|
|
Nitrate (ppm) |
BDL |
no range |
10 |
10 |
Runoff
from fertilizer use; leaching from septic tanks, sewage; erosion of natural
deposits |
|
|
Nitrite (ppm) |
BDL |
no range |
1 |
1 |
Runoff
from fertilizer use; leaching from septic tanks, sewage; erosion of natural
deposits |
|
|
Selenium (ppb) |
BDL |
no range |
50 |
50 |
Discharge
from petroleum and metal refineries; erosion of natural deposits; discharge
from mines |
|
|
Sodium (ppm) |
25 |
15.7 to 25 |
not regulated |
20 [proposed] |
An
element that occurs naturally in soils |
|
|
Sulfate (ppm) |
24 |
no range |
not regulated |
500 [proposed] |
A
mineral that occurs naturally in soils |
|
|
Thallium (ppb) |
BDL |
no range |
2 |
0.5 |
Leaching
from ore-processing sites; discharge from electronics, glass, and drug
factories |
|
|
Synthetic Organics, including Pesticides and
Herbicides Tested in 2 consecutive quarters, once every 3 years Tested in May, July and August 2003 |
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|
2,4-D (ppb) |
BDL |
no range |
70 |
70 |
Runoff form herbicide used on row crops |
|
|
2,4,5-TP (ppb) |
BDL |
no range |
50 |
50 |
Residue of banned herbicide |
|
|
Alachlor (ppb) |
BDL |
no range |
2 |
0 |
Runoff from herbicide used on row crops |
|
|
Atrazine (ppb) |
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