Drinking water data

Name of the operator:	InfraLeuna GmbH
Address:	Department of Water Systems, Water Supply Division At the main gate, building 5128 06237 Leuna
Water supply area:	B91 industrial estate (supplied to the Midewa company) City of Leuna (supplied to the company Stadtwerke Leuna)
Number of people supplied:	approx. 12,500

 

Using 26 groundwater wells, which are distributed around the Saale, groundwater is extracted from a depth of around ten meters and pumped into the drinking water plant via a pipeline system. A multi-stage purification process takes place here. In order to remove any existing turbidity and solids from the groundwater, the first treatment step is mechanical purification using filter gravel.

The high salt content of the groundwater must then be reduced. This is done using the reverse osmosis process. Part of the water is pressed through special membrane modules and thus desalinated - an energy-intensive but necessary process step. Partial desalination makes the water significantly softer. After purification using activated carbon filters and disinfection with ultraviolet light, the water leaves the drinking water plant with a hardness of 7-9°dH. This drinking water treatment process guarantees quality in accordance with the Drinking Water Ordinance.

Annual values 2024 - Daspig drinking water plant

The water constituents listed are an excerpt from the regularly conducted testing program. The concentrations are average values from the year 2024.

The limit values of the applicable Drinking Water Ordinance (TrinkwV) are specified. During treatment at the Daspig waterworks, sodium hydroxide is added to adjust the pH value and chlorine is added for disinfection (if required).

 

	Parameter	Unit	Mean value	Limit value	Test frequency / number per year
General parameters	Measuring temperature (ph)	°C	13		98
	Hardness	°dH	7,46		98
	Hardness	mmol/l CaCO3	1,33		98
	Hardness range*		Soft (1)
	Carbonate hardness	°dH	4,95		97
	Acid capacity	mmol/l	1,83		97
	Base capacity	mmol/l	0,017		97
	Calcite dissolving	mg/l	-1,1	5	97
	Calcium	mg/l	39,9		98
	Calcium	mmol/l	0,994		98
	Magnesium	mg/l	8,2		98
	Magnesium	mmol/l	0,337		98
	Kalium	mg/l	3,8		98
	Kalium	mmol/l	0,097		98
	Natrium	mg/l	77,8	200	98
	Total alkaline earth metal	mmol/l	1,35 (2)
	Phosphorus	mg/l	< 0,05		2
	o-phosphorus	mg/l	< 0,0583		98
	Chloride	mg/l	95,5	250	98
	Fluoride	mg/l	< 0,1	1,5	2
	Nitrate	mg/l	2,5	50	98
	Sulphate	mg/l	86,1	250	98
	Electrical conductivity	µS/cm	684	2790	98
	Ph Value	-	8,16	6,5-9,5	98
	True coloration (SAK 436 nm)	1/m	< 0,05	0,5	98
	Turbidity	NTU	< 0,09	1	98
	Oxygen	mg/l O2	8,62		98
Microbiological parameters	Coliform bacteria	n /100ml	0	0	24
	Escherichia coli	n /100ml	0	0	24
	Enterocco	n /100ml	0	0	24
	Colony count, 22°C	n/ml	0	20	24
	KColony count, 36°C	n /ml	0	100	24
Inorganic trace substance	Aluminium	mg/l	< 0,01	0,2	2
	Ammonium	mg/l	< 0,0193	0,5	98
	Antimony	mg/l	< 0,0005	0,005	2
	Arsenic	mg/l	< 0,0005	0,01	2
	Lead	mg/l	< 0,001	0,01	2
	Boron	mg/l	0,27	1	2
	Bromate	mg/l	< 0,002	0,01	2
	Cadmium	mg/l	< 0,0005	0,003	2
	Chlorate	mg/l	< 0,05	0,07	2
	Chlorite	mg/l	< 0,05	0,2	2
	Chromium	mg/l	< 0,0005	0,025	2
	Cyanide	mg/l	< 0,005	0,05	2
	Iron	mg/l	< 0,005	0,2	98
	Silicic aid (SiO2)	mg/l	2,29		98
	Copper	mg/l	< 0,005	2	2
	Managanese	mg/l	< 0,005	0,05	98
	Nickel	mg/l	< 0,002	0,02	2
	Nitrite	mg/l	< 0,016	0,1	98
	Mercury	mg/l	< 0,00005	0,001	2
	Selenium	mg/l	< 0,001	0,01	2
	Silicon	mg/l	1,23		2
	Uranium	mg/l	< 0,001	0,01	12
Organic trace substance	Benzene	mg/l	< 0,0001	0,001	2
	Bisphenol A	mg/l	< 0,00005	0,0025	2
	TOC	mg/l	0,48		98
	Benzo(a)pyrene	mg/l	< 0,0000011	0,00001	2
	PAK (TVO)	mg/l	< 0,00003	0,0001	2
	1,2-Dichlorethane	mg/l	< 0,0002	0,003	96
	Tri- and tetrachloroethene	mg/l	0,0000225	0,01	96
	Total trihalomethanes	mg/l	< 0,000086	0,01	90
	Total PFAS-4	mg/l	0,000007	0,00002	4
	Total PFAS-20	mg/l	< 0,00002	0,0001	4
	HAA-5	mg/l	0,0023	0,06	1
Radioactive substances	Radon-222	Bq/l	<0,2	100	4
	Guideline dose parameter value	mSv/a	complied with	0,1	4
	Guideline dose test value	Calculation	0,27	1	4

*The hardness ranges for drinking water have been defined as follows in accordance with the law on the environmental compatibility of detergents and cleaning agents (Washing and Cleaning Agents Act, WRMG, 2007):

• Hardness range soft: less than 1.5 mmol/l (millimoles) calcium carbonate per litre corresponds to 8.4°dH (German hardness level)
• Hardness range medium: 1.5 to 2.5 mmol/l (millimoles) calcium carbonate per litre corresponds to 8.4 to 14°dH (German degree of hardness)
• Hardness range hard: more than 2.5 mmol/l (millimoles) calcium carbonate per litre corresponds to more than 14°dH (degree of German hardness)

Corrosion behaviour

With the existing water quality, there are restrictions on the use of the following materials:

• Cast iron, unalloyed and low-alloy steels (DIN EN 12502-5)
• Hot-dip galvanised ferrous materials (DIN EN 12502-3)
• Unalloyed and low-alloy ferrous materials (DIN 50930 Part 2)
• Hot-dip galvanised ferrous materials (DIN 50930 Part 3)
• Stainless steels (DIN 50930 Part 4, there is a risk of knife-edge corrosion with brazed joints made with silver-containing brazing alloys)

If copper is used as a material, the change in the quality of the drinking water can be considered acceptable with regard to its properties as a safe foodstuff. If galvanised ferrous materials are used, the change in the quality of the drinking water can be considered acceptable with regard to its properties as a safe foodstuff if the limit values for antimony, arsenic, lead, cadmium and bismuth are complied with in the zinc coating.

 

Recommendations for saving water

• Shower instead of bathing. Shorter showers
• Turn off the water when brushing your teeth and shaving
• Use an economical shower head
• Use a toothbrush mug
• Install flow restrictors (aerators)
• Use water-saving household appliances
• Wash fruit and vegetables in a bowl of water
• Wash dishes in the dishwasher
• Wash your car in a car wash with water recycling
• Water plants in the morning and evening. Preferably with rainwater

 

Avoidance of stagnant water

Stagnant water is water that stands still in pipework systems for longer than four hours and harbours an increased risk of germ multiplication, particularly legionella and pseudomonads. Long stagnation times can also lead to the mobilisation of substances from the installation materials. To prevent stagnant water from forming, pipes should be flushed regularly and shut off during long periods of absence.

Information on lead pipes in accordance with §17 of the Drinking Water Ordinance

Ask your property owner or manager what material your domestic installation is made of. If lead pipes are still installed, they must be replaced. If he does not fulfil this obligation, the health authority must intervene. The German Drinking Water Ordinance stipulates a limit value of 0.010 milligrams per litre for lead in drinking water. This value can only be guaranteed with a lead-free supply pipe. Existing lead pipes should therefore be replaced as soon as possible. Replacement must take place by 12 January 2026 at the latest.

 

Risk management

Risk management in accordance with Section 35 Paragraph 3 Sentence 2 Number 7 is in preparation.