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2001
MAWSS WATER QUALITY REPORT
|
Substance
|
MCLG
|
MCL
|
Highest
Level Detected
|
Range
|
| REGULATED
SUBSTANCES |
|
Nitrate,
ppm
|
10
|
10
|
0.18
|
0.081 to 0.18
|
|
Barium,
ppm
|
2
|
2
|
0.030
|
0.027 to 0.030
|
|
Fluoride,
ppm
|
4
|
4
|
0.99
|
0.89 to .99
|
|
Turbidity,
NTU1
|
N/A
|
TT
|
0.21
|
0.05 to 0.21
|
|
Total
Organic Carbon (TOC)2
|
N/A
|
TT
|
Lowest
Performance Ratio = 1.06
|
N/A
|
|
Chlorine,
ppm
|
MRDLG
= 4
|
MRDL
= 4
|
Highest
average = 2.1
|
1.9 to 2.1
|
|
Chlorite,
ppm
|
0.8
|
1
|
0.807
|
0.386 to 0.807
|
|
Chlorine
Dioxide, ppb
|
MRDLG
= 800
|
MRDL
= 800
|
340
|
ND TO 340
|
|
Lead,
ppb3
|
0
|
AL
|
3.56
|
ND TO 8.87
|
|
Copper,
ppm4
|
1.3
|
AL
|
0.0100
|
ND to 0.0120
|
|
Total
Trihalomethanes, ppb
|
N/A
|
80
|
Highest
average = 65.9
|
27.8 to 114
|
|
Haloacetic
Acids (Five), ppb
|
N/A
|
60
|
Highest
average = 30.8
|
19.1 to 49.1
|
| UNREGULATED
SUBSTANCES |
|
Bromodichloromethane,
ppb
|
0
|
Not
regulated
|
Highest
average = 10.6
|
6.52 to 13.7
|
|
Chloroform,
ppb
|
-
|
Not
regulated
|
Highest
average = 55.4
|
21.3 to 101
|
|
Dichloroacetic
Acid, ppb
|
0
|
Not
regulated
|
Highest
average = 23.5
|
ND to 37.3
|
|
Dibromoacetic
Acid, ppb
|
N/A
|
Not
regulated
|
Highest
average = 20.5
|
ND to 36.8
|
|
Monobromoacetic
Acid, ppb
|
N/A
|
Not
regulated
|
Highest
average = ND
|
ND
|
|
Monochloroacetic
Acid, ppb
|
N/A
|
Not
regulated
|
Highest
average = 3.2
|
ND to 4.0
|
|
Trichloroacetic
Acid, ppb
|
300
|
Not
regulated
|
Highest
average = 10.0
|
4.44 to 16.7
|
SUBSTANCES
REGULATED UNDER SECONDARY DRINKING WATER STANDARDS |
|
Chloride,
ppm
|
N/A
|
250
|
8.1
|
6.4 to 8.1
|
|
Total
Dissolved Solids, ppm
|
N/A
|
500
|
81
|
66 to 81
|
|
Zinc,
ppm
|
N/A
|
5
|
0.22
|
0.16 to 0.22
|
|
pH
|
N/A
|
N/A
|
8.4
|
7.3 to 8.4
|
|
Alkalinity
as CaCO3, ppm
|
N/A
|
N/A
|
15
|
9.9 to 15
|
|
Sodium,
ppm
|
N/A
|
N/A
|
3.1
|
2.6 to 3.1
|
|
Sulfate
as SO4, ppm
|
N/A
|
N/A
|
25
|
21 to 25
|
|
Calcium,
ppm
|
N/A
|
N/A
|
16
|
13 to 16
|
|
Magnesium,
ppm
|
N/A
|
N/A
|
1.1
|
1.0 to 1.1
|
|
Hardness
as CaCO3, ppm
|
N/A
|
N/A
|
44
|
37 to 44
|
|
Temperature,
degrees C
|
N/A
|
N/A
|
30
|
9 to 30
|
|
Corrosivity
(saturation index)
|
N/A
|
N/A
|
-2.0
|
-1.5 to -2.0
|
| 1.
|
100%
of the samples tested for turbidity were below the
treatment technique level of 0.5 NTU |
| 2. |
Required
TOC reduction was achieved |
| 3. |
No
samples tested for lead exceeded the current action
level of 15 ppb |
| 4. |
No
samples tested for copper exceeded the current action
level of 1.3 ppm |
| Definitions
and Abbreviations: |
| Maximum
contaminant level goal or MCLG |
-
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. |
| Maximum
contaminant level or MCL |
-
The highest level of a contaminant that is allowed
in drinking water. MCLs are set as close to the MCLGs
as feasible using the best available treatment technology. |
| Maximum
residual disinfectant level goal or MRDLG |
-
The level of a drinking water disinfectant below
which there is no known or expected risk to health.
MRDLGs do not reflect the benefits of the use of disinfectants
to control microbial contamination. |
| Maximum
residual disinfectant level or MRDL |
-
The highest level of a disinfectant allowed in drinking
water. There is convincing evidence that addition of
a disinfectant is necessary for control of microbial
contaminants. |
| Treatment
Technique or TT |
-
A required process intended to reduce the level
of a contaminant in drinking water. |
| Action
level or AL |
-
The concentration of a contaminant which, if exceeded,
triggers a treatment or other requirement which a water
system must follow. |
| Range |
-
The lowest to the highest values for all
samples tested for each contaminant. If only one sample
is tested, no range is listed for that contaminant in
the table. |
| ppm |
= |
Parts
per million, or milligrams per liter |
| ppb |
= |
Parts
per billion, or micrograms per liter |
| NTU |
= |
Nephelometric
Turbidity Units |
| ND |
= |
None
detected, or below the detection limit |
| N/A |
= |
Not
applicable |
|
|
