We’re committed to delivering high-quality drinking water to our customers. Each year we carry out thousands of tests on samples we have taken from treatment works, reservoirs and homes across the region.
The samples we take are analysed in a UKAS accredited laboratory to ensure they comply with drinking water safety standards.
Schedule 1 Parameters
|
Units |
PCV |
Number of Samples |
Number of Samples contravening PCV |
% No. of samples contravening PCV |
Min |
Mean |
Max |
|
|
Colour |
mg/l Pt/Co |
20 |
44 |
0 |
0 |
2.00 |
2.05 |
4.00 |
|
Turbidity |
FTU |
4 |
44 |
0 |
0 |
0.12 |
0.12 |
0.15 |
|
Odour (quantitative) |
Dil Number |
0 |
44 |
0 |
0 |
<0.00 |
<0.00 |
0.00 |
|
Taste (quantitative) |
Dil Number |
0 |
43 |
0 |
0 |
<0.00 |
<0.00 |
0.00 |
|
Sodium |
mg/l |
200 |
7 |
0 |
0 |
14.70 |
21.01 |
30.70 |
|
Nitrate (as NO3) |
mg/l |
50 |
7 |
0 |
0 |
26.70 |
35.64 |
41.10 |
|
Nitrite (as NO2) |
mg/l |
0.1 |
7 |
0 |
0 |
<0.01 |
<0.01 |
0.01 |
|
Nitrate/Nitrite Ratio |
mg/l |
1 |
7 |
0 |
0 |
0.53 |
0.71 |
0.82 |
|
Aluminium |
ug/l |
200 |
44 |
0 |
0 |
6.00 |
10.99 |
43.40 |
|
Iron |
ug/l |
200 |
44 |
0 |
0 |
7.30 |
7.44 |
11.30 |
|
Manganese |
ug/l |
50 |
44 |
0 |
0 |
1.70 |
1.70 |
1.70 |
|
Copper (New Reg Limit) |
mg/l |
2 |
7 |
0 |
0 |
0.01 |
0.02 |
0.06 |
|
Fluoride |
mg/l |
1.5 |
7 |
0 |
0 |
0.41 |
0.77 |
1.00 |
|
Arsenic (New Regs Limit) |
ug/l |
10 |
7 |
0 |
0 |
1.00 |
2.29 |
3.00 |
|
Cadmium |
ug/l |
5 |
7 |
0 |
0 |
0.12 |
0.12 |
0.12 |
|
Chromium |
ug/l |
50 |
7 |
0 |
0 |
<0.70 |
<0.70 |
0.90 |
|
Nickel (New Reg Limit) |
ug/l |
20 |
7 |
0 |
0 |
<0.80 |
0.90 |
1.60 |
|
Lead (New Reg Limit) |
ug/l |
10 |
7 |
0 |
0 |
0.90 |
0.90 |
0.90 |
|
Antimony (New Reg Limit) |
ug/l |
5 |
7 |
0 |
0 |
0.20 |
0.20 |
0.20 |
|
Selenium |
ug/l |
10 |
7 |
0 |
0 |
0.80 |
0.80 |
0.80 |
|
PAH |
ug/l |
0.1 |
6 |
0 |
0 |
<0.00 |
<0.00 |
0.00 |
|
Escherichia coli |
No./100ml |
0 |
110 |
0 |
0 |
<0.00 |
<0.00 |
0.00 |
|
Intestinal Enterococci |
cfu/100ml |
0 |
7 |
0 |
0 |
<0.00 |
<0.00 |
0.00 |
|
Boron (New Reg Limit) |
mg/l |
1 |
7 |
0 |
0 |
0.04 |
0.04 |
0.04 |
|
Benzo(a)pyrene |
ug/l |
0.01 |
6 |
0 |
0 |
0.00 |
0.00 |
0.00 |
|
Trihalomethanes (total) |
ug/l |
100 |
7 |
0 |
0 |
17.00 |
31.47 |
54.60 |
|
Bromate |
ug/l |
10 |
7 |
0 |
0 |
0.80 |
0.81 |
0.90 |
|
Units |
PCV |
Number of samples |
Number of Samples contravening PCV |
% No. of samples contravening PCV |
Minimum |
Mean |
Maximum |
|
|
pH (New Reg Limit) Env |
- |
44 |
0 |
0 |
7.00 |
7.42 |
7.90 |
|
|
Sulphate (as SO4) |
mg/l |
250 |
7 |
0 |
0 |
20.60 |
28.00 |
42.80 |
|
Ammonium (as NH4) |
mg/l |
0.5 |
44 |
0 |
0 |
<0.03 |
0.02 |
0.02 |
|
Total coliforms |
No./100ml |
0 |
110 |
0 |
0 |
<0.00 |
0.00 |
0.00 |
|
3 day count,22 deg C |
cfu/ml |
50 |
44 |
0 |
0 |
<0.00 |
4.18 |
82.00 |
|
Free chlorine |
mg/l |
- |
110 |
0 |
0 |
0.03 |
0.17 |
0.50 |
|
Total chlorine |
mg/l |
- |
110 |
0 |
0 |
0.03 |
0.26 |
0.74 |
|
Conductivity |
uS/cm |
2500 |
44 |
0 |
0 |
323.00 |
411.23 |
509.00 |
|
Chloride |
mg/l |
250 |
7 |
0 |
0 |
37.00 |
44.00 |
53.00 |
| Average of Ca | Average of Mg | mg/l or ppm CaCO3 | Degrees Clark (*0.07) | Degrees French (*0.10) | Degrees German (*0.056) |
| 46.68 | 8.99 | 153.5 | 10.7 | 15.4 | 8.6 |
Water quality terms
Find out what the technical terms used in the water quality reports mean.