Quality
Drinking water is one of the most intensively tested commodities. The specialists in our laboratory monitor the quality of water in the Rhine region.
Daily analyses are carried out using state-of-the-art equipment in accordance with the latest methods. Measuring results are collected from all around the city area, for example from wells, at waterworks and from the drinking water network. Modern laboratory technology enables analytical chemists to detect minute traces of a substance in a sample of water. Nowadays, specialists are able to determine such small substance concentrations equivalent to a lump of sugar dissolved in a medium-sized dam.
Regular official drinking water analyses confirm the quality of our drinking water. The most frequently requested parameters are listed for the individual supply regions in the table below.
Installation materials
Click here for information on metals used in the drinking water installation (only available in German) > here. PDF download (108 KB)
Water hardness
The content of dissolved calcium and magnesium salts in drinking water determines the water hardness. The hardness is divided into three ranges:
| Hardness range |
Total degree of calcium carbonate in mmol/l |
equivalent to |
| soft |
< 1,5 |
< 8,4 °dH |
| medium |
1,5 bis 2,5 |
8,4 - 14 °dH |
| hard |
> 2,5 |
> 14 °dH |
The drinking water of the RheinEnergie supply area is mainly situated in hardness range "hard".
Cologne located on the left bank of the Rhine and Pulheim north
| Origin: Waterworks Weiler, Severin II and Hochkirchen |
| |
|
Updated 2008 |
| Total hardness |
3,35 ± 0,13 |
mmol/l (hard) |
| pH value |
7,20 ± 0,04 |
|
| Calcium |
109,9 ± 4,1 |
mg/l |
| Magnesium |
14,9 ± 0,7 |
mg/l |
| Sodium |
39,4 ± 1,7 |
mg/l |
| Nitrate |
21,9 ± 1,3 |
mg/l |
| Fluoride |
0,12 |
mg/l |
| Sulphate |
84,5 ± 6,5 |
mg/l |
| Phosphate total |
< 0,05 |
mg/l |
The full drinking water analysis (only available in German) as PDF download (30 KB)
Cologne
located on the right bank of the Rhine
| Origin: Waterworks Höhenhaus and Westhoven, and mixing station Urbach |
| |
|
Updated 2008 |
| Total hardness |
2,65 ± 0,23 |
mmol/l (medium to hard) |
| pH value |
7,39 ± 0,08 |
|
| Calcium |
83,6 ± 5,0 |
mg/l |
| Magnesium |
13,6 ± 3,7 |
mg/l |
| Sodium |
30,3 ± 1,8 |
mg/l |
| Nitrate |
21,0 ± 4,8 |
mg/l |
| Fluoride |
0,08 |
mg/l |
| Sulphate |
75,9 ± 15,2 |
mg/l |
| Phosphate total |
0,91 ± 0,23 |
mg/l |
The full drinking water analysis (only available in German) as PDF download (30 KB)
Pulheim south and Frechen
| (except Habbelrath and Grefrath) origin: Waterworks Dirmerzheim |
| |
|
Updated 2008 |
| Total hardness |
2,94 ± 0,01 |
mmol/l (hard) |
| pH value |
7,67 ± 0,0 |
|
| Calcium |
90,6 ± 0,4 |
mg/l |
| Magnesium |
16,5 ± 0,1 |
mg/l |
| Sodium |
11,8 ± 0,2 |
mg/l |
| Nitrate |
< 5,0 |
mg/l |
| Fluoride |
0,09 |
mg/l |
| Sulphate |
120 ± 1,0 |
mg/l |
| Phosphate total |
< 0,05 |
mg/l |
The full drinking water analysis (only available in German) as PDF download (21 KB)
Frechen-Habbelrath and Frechen-Grefrath
| Origin: Waterworks Türnich |
| |
|
Updated 2008 |
| Total hardness |
2,06 ± 0,01 |
mmol/l (medium) |
| pH value |
7,67 ± 0,05 |
|
| Calcium |
63,1 ± 0,4 |
mg/l |
| Magnesium |
12,4 ± 0,2 |
mg/l |
| Sodium |
10,8 ± 1,0 |
mg/l |
| Nitrate |
< 5,0 |
mg/l |
| Fluoride |
0,1 |
mg/l |
| Sulphate |
45,3 ± 0,8 |
mg/l |
| Phosphate total |
< 0,05 |
mg/l |
The full drinking water analysis (only available in German) as PDF download (21 KB)
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