|
NEPEAN WATER FILTRATION PLANT
1 April 2004 to 30 June 2004
|
|
|
Raw Water
|
Filtered Water
|
|
|
No. of samples
|
Min
|
Ave
|
Max
|
No. of samples
|
Min
|
Ave
|
Max
|
Guideline Value*
|
Samples passed
|
|
MICROBIOLOGICAL
|
total coliforms*** |
12 |
10 |
- |
770 |
12 |
0 |
- |
0 |
0 Orgs/100 mL |
100% |
E. coli |
12 |
0 |
- |
12 |
12 |
0 |
- |
0 |
0 Orgs/100 mL |
100% |
Giardia |
13 |
0 |
- |
0 |
# |
# |
- |
# |
** |
NA |
Cryptosporidium |
13 |
0 |
- |
0 |
# |
# |
- |
# |
** |
NA |
PHYSICAL/CHEMICAL |
turbidity |
12 |
0.67 |
1.37 |
2.45 |
12 |
0.07 |
0.13 |
0.32 |
<5 NTU |
100% |
true colour |
12 |
5 |
6 |
10 |
12 |
<2 |
<2 |
2 |
<15 HU |
100% |
pH |
12 |
7.0 |
7.2 |
7.4 |
12 |
7.4 |
7.5 |
7.7 |
6.5 - 8.5 pH units |
100% |
free chlorine |
# |
# |
# |
# |
12 |
0.46 |
0.76 |
0.96 |
<5 mg/L |
100% |
monochloramine |
# |
# |
# |
# |
12 |
0.04 |
0.07 |
0.11 |
<3 mg/L |
100% |
fluoride |
# |
# |
# |
# |
12 |
0.69 |
1.07 |
1.16 |
<1.5 mg/L |
100% |
trihalomethanes |
# |
# |
# |
# |
3 |
0.030 |
0.040 |
0.048 |
<0.25 mg/L |
100% |
iron |
12 |
0.075 |
0.171 |
0.300 |
12 |
<0.010 |
0.011 |
0.061 |
<0.3 mg/L |
100% |
aluminium |
12 |
<0.010 |
<0.010 |
0.019 |
12 |
<0.010 |
0.011 |
0.023 |
<0.2 mg/L |
100% |
manganese |
12 |
0.036 |
0.101 |
0.191 |
12 |
<0.001 |
0.003 |
0.010 |
<0.1 mg/L |
100% |
All parameters complied with the guidelines during the quarter for the water leaving the water filtration plant.
There is no requirement to sample free chlorine or monochloramine, fluoride and trihalomethanes in the raw water.
* Australian Drinking Water Guidelines, NH&MRC 1996, normally reported on an annual basis. This represents a quarterly result only.
** No guideline set for raw water
# Not required
Raw water is defined as the water entering the Water Filtration Plant from the dam
Filtered Water is defined as the water leaving the Water Filtration Plant
|
NEPEAN WATER FILTRATION PLANT
1 July 2003 to 30 June 2004
|
|
|
Raw Water
|
Filtered Water
|
|
|
No. of samples
|
Min
|
Ave
|
Max
|
No. of samples
|
Min
|
Ave
|
Max
|
Guideline Value*
|
Samples passed
|
|
MICROBIOLOGICAL
|
total coliforms*** |
47 |
0 |
- |
2000 |
52 |
0 |
- |
3 |
0 CFU/100 mL |
98.1% |
E. coli*** |
47 |
0 |
- |
12 |
52 |
0 |
- |
0 |
0 CFU/100 mL |
100% |
Giardia |
53 |
0 |
- |
0 |
# |
# |
- |
# |
** |
NA |
Cryptosporidium |
53 |
0 |
- |
0 |
# |
# |
- |
# |
** |
NA |
PHYSICAL/CHEMICAL |
turbidity |
47 |
0.36 |
1.11 |
2.45 |
52 |
0.07 |
0.17 |
0.34 |
<5 NTU |
100% |
true colour |
47 |
5 |
7 |
10 |
52 |
<2 |
<2 |
2 |
<15 HU |
100% |
pH |
47 |
6.9 |
7.2 |
7.8 |
52 |
7.1 |
7.5 |
7.8 |
6.5 - 8.5 pH units |
100% |
free chlorine |
# |
# |
# |
# |
52 |
0.46 |
0.79 |
0.98 |
<5 mg/L |
100% |
monochloramine |
# |
# |
# |
# |
52 |
0.00 |
0.08 |
0.18 |
<3 mg/L |
100% |
fluoride |
# |
# |
# |
# |
52 |
0.69 |
1.01 |
1.16 |
<1.5 mg/L |
100% |
trihalomethanes |
# |
# |
# |
# |
12 |
0.030 |
0.038 |
0.048 |
<0.25 mg/L |
100% |
iron |
47 |
0.055 |
0.127 |
0.381 |
52 |
<0.010 |
<0.010 |
0.061 |
<0.3 mg/L |
100% |
aluminium |
47 |
<0.010 |
0.016 |
0.046 |
52 |
<0.010 |
0.016 |
0.024 |
<0.2 mg/L |
100% |
manganese |
47 |
0.006 |
0.056 |
0.191 |
52 |
<0.001 |
0.003 |
0.018 |
<0.1 mg/L |
100% |
* Australian Drinking Water Guidelines, NH&MRC 1996, normally reported on an annual basis.
** No guideline set for raw water
# Not required
Raw water is defined as the water entering the Water Filtration Plant from the dam
Filtered Water is defined as the water leaving the Water Filtration Plant
