Catalina Island Customers - 2007 Consumer Confidence Report
Contaminant Testing Results
Sodium and Hardness (and reporting units)
| Contaminant |
Range of Dates (2007) |
Average of Levels Detected |
Range of Detections |
MCL |
PHG (MCLG) |
Typical Source of Contaminant |
| Sodium (ppm) |
6/19 |
42 |
N/A |
N/A |
N/A |
Generally found in ground & surface water |
| Hardness (ppm) |
6/19 |
36 |
N/A |
N/A |
N/A |
Generally found in ground & surface water |
Contaminants with a Primary Drinking Water Standard (and reporting units)
| Contaminant |
Range of Dates (2007) |
Average of Levels Detected |
Range of Detections |
MCL |
PHG (MCLG) |
Typical Source of Contaminant |
| Turbidity (NTU units) |
1/2-12/12 |
0.11 |
ND - 0.19 |
TT |
N/A |
Soil runoff |
| Gross Alpha Particle Activity (pCi/L) |
6/11-12/14 |
1.7 |
ND - 4.56 |
15 |
N/A |
Erosion of natural deposits |
| Residual Chlorine, Total (ppm) |
1/2-12/31 |
0.83 |
0.3-2 |
[4.0] |
N/A |
Drinking water disinfectant added for treatment |
| Fluoride (ppm) |
6/19 |
0.10 |
N/A |
2 |
1 |
Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer; and aluminum factories |
| Haloacetic Acids (ppB) |
6/11-12/12 |
0.11 |
ND - 26 |
60 |
N/A |
Byproduct of drinking water disinfection |
| Nickel (ppB) |
6/19 |
0.8 |
N/A |
100 |
12 |
Erosion of natural deposits; discharge from metal factories |
| Nitrate as Nitrate (ppm) |
6/11-6/19 |
0.57 |
ND-3 |
45 |
45 |
Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits |
| Total Trihalomethanes (ppb) |
3/19-12/21 |
57.92 |
ND - 120 |
80 |
N/A |
By-product of drinking water chlorination
|
Contaminants with a Secondary Drinking Water Standard (and reporting units)
| Contaminant |
Range of Dates (2007) |
Average of Levels Detected |
Range of Detections |
MCL |
PHG (MCLG) |
Typical Source of Contaminant |
| Odor Threshold (units) |
1/2-12/12 |
1.11 |
1.00 - 2.00 |
3 |
N/A |
Naturally-occuring organic materials |
| Specific Conductance (µS/cm) |
6/19 |
320 |
N/A |
1.600 |
N/A |
Substances that form ions when in water; seawater influence |
| Total Dissolved Solids |
6/19-8/1 |
740 |
180-1,300 |
1,000 |
N/A |
Runoff/leaching from natural deposits |
| Sulfate (ppm) |
6/19 |
1.4 |
N/A |
500 |
N/A |
Runoff/leaching from natural deposits; industrial wastes |
| Chloride (ppm) |
6/11-8/1 |
242 |
740-410 |
500 |
N/A |
Runoff/leaching from natural deposits; seawater influence |
| Zinc (ppm) |
6/19 |
0.21 |
N/A |
5.0 |
N/A |
Runoff/leaching from natural deposits; industrial wastes |
Microbiological(and reporting units)
| Contaminant |
Highest No. of Detections
(in a month) |
No. of Months
in Violation |
MCL
[MRDL] |
PHG/(MCLG)
[MRDLG] |
Typical Source of Contaminant |
| Total Coliform Bacteria (ppm) |
1 |
0 |
More than 1 in a mo. |
0 |
Naturally present in the environment |
Lead and Copper (and reporting units)
| Contaminant |
No. of Samples |
90th Percentile Level Detected |
No. of Sites Exceeding AL |
AL |
PHG |
Typical Source of Contaminant |
| Lead (ppb) |
1 |
ND |
0 |
15 |
2 |
Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits |
| Copper (ppm) |
1 |
ND |
0 |
1.3 |
0.17 |
Internal corrosion of household water plumbing systems; erosion of natural deposits; leaching from wood preservatives |
Terms & Abbreviations
Maximum Contaminant Level (MCL):
The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs are set to protect the odor, taste and appearance of drinking water.
Maximum Contaminant Level Goal (MCLG):
The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency.
Public Health Goal (PHG):
The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the California Environmental Protection Agency.
Primary Drinking Water Standard or PDWS:
MCLs for contaminants that affect health along with their monitoring and reporting requirements and water treatment requirements.
Regulatory Action Level (AL):
The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
Treatment Technique:
A required process intended to reduce the level of a contaminant in drinking water.
N/A:
not applicable
ND:
not detectable at testing limit
ppb:
parts per billion or micrograms per liter ppm - parts per million or milligrams per liter
pCi/l:
picocuries per liter (a measure of radiation)