The tables below list drinking water contaminants that we
detected during the 2002 calendar year. Not listed were more than
125 substances that we test for but which were below the detection limits
for reporting. The presence of these contaminants in the water does
not necessarily indicate that the water presents a health risk.
Unless otherwise noted, the data presented in this table is from
testing conducted between January 1 and December 31, 2002.
PRIMARY
STANDARDS |
|
Substances Monitored at the
Treatment Plant |
MCL |
MCLG
or PHG |
Surface
Range |
Water
Average |
Typical Source of Containment |
| Turbidity
(NTU) |
TT1 |
NA |
0.02-0.10 |
0.07 |
Soil Runoff |
|
Aluminum (ug/1) |
1,000 |
600 |
51-233 |
117 |
Erosion of natural
deposits; residue from some surface water treatment processes |
| Fluoride
(mg/l) |
2 |
1 |
0.29-0.47 |
0.34 |
Erosion of natural
deposits; water additive that promotes strong teeth; discharge
from fertilizer and aluminum factories. |
| Gross
Alpha2 (pCi/l) |
15 |
0 |
1.6-2.9 |
1.63 |
Erosion of natural
deposits |
| Gross
Beta2 (pCi/l) |
50 |
0 |
1.6-4.3 |
2.68 |
Decay of natural
and manmade deposits. |
Disinfection
Byproducts
Sampled in the Distribution System |
|
|
|
|
|
| Free
Chlorine Residual (mg/l) |
4.0
MRDL |
4.0
MRDL |
0.10-2.70 |
1.5 |
By-product of
water chlorination.3 |
| Total
Trihalomethanes (ug/l) |
80 |
NA |
33.2-130 |
60 |
By-product of
water chlorination.3 |
| Haloacetic
Acid (ug/l) |
60 |
NA |
11.2-152.1 |
38.7 |
By-product of
water chlorination.3 |
Lead and Copper Rule Sampled at
Customers' Taps
09-2001 |
|
|
|
|
|
| Lead2
(ug/l)) |
AL=15 |
2 |
ND-2.0 |
0.1025 |
Corrosion
of house hold plumbing and erosion of natural deposits;
discharges from industrial manufacturers. |
| Copper2
(mg/l) |
AL=1.3 |
0.17 |
ND-0.23 |
0.07 |
Corrosion
of house hold plumbing and erosion of natural deposits;
discharges from industrial manufacturers. |
|
SECONDARY
STANDARDS |
|
Substances
Monitored at the Treatment Plant
|
Secondary
MCL |
Surface
Water |
Typical
Source of Containment |
|
Range |
Average |
| Chloride
(mg/l) |
500 |
7-22 |
12 |
Runoff or leaching
from wastes; seawater influence. |
| Odor
threshold at 60o (Units) |
3 |
1-25 |
6.5 |
Naturally
occurring organic minerals. |
| Specific
Conductivity (umhos/cm) |
1,600 |
680-975 |
760 |
Substances that
form ions in water. |
| Sulfate
(mg/l) |
500 |
190-323 |
228 |
Runoff or leaching
from natural deposits; industrial wastes. |
| Total
Dissolved Solids (PPM) |
1,000 |
430-733 |
531 |
Runoff or leaching
from natural deposits. |
|
OTHER
CONSTITUENTS |
|
Boron (ug/l) |
1,000 (AL) |
280-480 |
340 |
|
|
Vanadium (ug/l) |
50 (AL) |
ND-4.9 |
2.2 |
| Hardness
(CaCO3) (PPM) |
NS |
330-436 |
350 |
| Sodium
(PPM) |
NS |
25-53 |
31 |
| Calcium
(PPM) |
NS |
74-94 |
80 |
| Magnesium
(PPM) |
NS |
25-55 |
33 |
| Potassium
(PPM |
NS |
1.8-2.8 |
2.1 |
| Alkalinity
(PPM) |
NS |
164-205 |
171 |
|
Control of DBP precursors - TOC
(mg/l |
NS |
2.59-3.22 |
2.91 |
|
Halocetilenitrite - HAN (ug/l) |
NS |
1.7-6.7 |
4.7 |
|
Chloroplorin - CP (ug/l) |
NS |
0.0-1.2 |
0.4 |
|
Chloral hydrate - CH (ug/l) |
NS |
0.0-33 |
7.9 |
|
Total Organic halides - TOX (ug/l) |
NS |
50-450 |
178 |
|
Chlorate - (ug/l) |
NS |
4.9-15 |
8.9 |
|
|
MRDL:
Maximum Residual Disinfection Level.
MRDLG:
Maximum Residual Disinfection Level Goal.
Primary
Drinking Water Standard or PDWS: 6MCLs for contaminants that
affect health along with their monitoring and reporting
requirements and water treatment requirements. |
Footnotes:
1 Turbidity is a measure of the cloudiness of the
water. Montecito Water District monitors for it continuously
because turbidity is a good indicator of the effectiveness
of our filtration system.
Turbidity
of the filtered water must: 1) Be less than or equal to 0.5
NTU in 95% of measurements in a month; 2) Not exceed 1.0 NTU
for more than eight consecutive hours; 3) Not exceed 5.0 NTU
at any time. |
•
100% of the District’s samples
met the Turbidity Performance standard.
• The
highest single surface water turbidity measurement during
the year was 0.28.
• The District had no
violations of any surface water treatment requirement.
2 The State allows us to monitor for some contaminants
less than once per year because the concentrations of these
contaminants do not change frequently. Some of our data,
though representative, are |
more than one year old.
Constituents that were tested previous to 2001 follow with
their test date in parenthesis: Asbestos (1997); and
radioactivity (1998).
3 Ortega Reservoir is not covered and is exposed to the
possibility of contamination and development of disinfection
by-products. The District has a reservoir management plan to
keep it clean and is working diligently to cover it.
|
|
