How hard is the water in Oppenweiler?

NOW Zweckverband Wasserversorgung Nordostwürttemberg publishes a total hardness of 13.3 °dH for the supply zone LW-Wasser Ltg. 1 3 (hardness range mittel (2)). The hardness range is a classification under the German Detergents and Cleaning Products Act (soft below 8,4 °dH, medium 8,4 to 14 °dH, hard above that) and not a quality verdict — it indicates how much calcium and magnesium is dissolved in the water. Basis: Publication by the water supplier, retrieved on 11/07/2026.

How much nitrate is in the drinking water in Oppenweiler?

NOW Zweckverband Wasserversorgung Nordostwürttemberg publishes a nitrate value of 21,4 mg/L for the supply zone LW-Wasser Ltg. 1 3. The statutory parametric value is 50 mg/l; the measured value represents 43 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.

Who supplies the drinking water in Oppenweiler?

NOW Zweckverband Wasserversorgung Nordostwürttemberg. The values shown here come from the supply zone LW-Wasser Ltg. 1 3 and apply to the water the supplier delivers. What happens between the building connection and the tap — in old lead pipes, for example — is not covered by these analyses; information on that is provided by owners, the health authority or an examination by an accredited laboratory.

Drinking water in Oppenweiler

12 supply zones — values can differ depending on the district. Below is the zone with the most documented parameters, the others collapsed underneath. To determine the exact match, look up the postcode.

How to read the share of the parametric value

12 % Share of the parametric value. The proportion of the permitted maximum that the measured value uses — here 12 %, so just over an eighth.

< 10 % * Below the limit of quantification. The substance was not detectable. The mark shows where the detection limit lies relative to the parametric value — the actual share of the parametric value is below that.

Several samples per year: for chemical parameters the mean value is given, for microbiological ones the highest measured value. There the parametric value is zero — a single finding would disappear in the average, and it is precisely that finding which is the information. Which reference applies is stated in the last column of the table.

LW-Wasser Ltg. 1 3

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2022. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.

Water hardness

13.3 °dH

Hardness range mittel (2)

Key values LW-Wasser Ltg. 1 3
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	21,4 mg/L	50 mg/l	43 %	Mean · LW-Wasser Ltg. 1 - 3
Lead	< 0,0005 mg/L below limit of quantification	10 µg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Escherichia coli (E. coli)	0 Anz./100 mL	0/100 ml	—	Mean · LW-Wasser Ltg. 1 - 3
Sulphate	25,8 mg/L	250 mg/l	10 %	Mean · LW-Wasser Ltg. 1 - 3
Sodium	13,7 mg/L	200 mg/l	7 %	Mean · LW-Wasser Ltg. 1 - 3

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (57 — most recent value per parameter)

Microbiology (2)

Microbiology – LW-Wasser Ltg. 1 3
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 Anz./100 mL	0/100 ml	—	Mean · LW-Wasser Ltg. 1 - 3
Intestinal enterococci	0 Anz./100 mL	0/100 ml	—	Mean · LW-Wasser Ltg. 1 - 3

Chemical parameters (24)

Chemical parameters – LW-Wasser Ltg. 1 3
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	< 0,0003 mg/L below limit of quantification	3 µg/l	< 10 % *	Mean · LW-Wasser Ltg. 1 - 3
Acrylamide	< 0,00005 mg/L below limit of quantification	0.1 µg/l	< 50 % *	Mean · LW-Wasser Ltg. 1 - 3
Antimony	< 0,001 mg/L below limit of quantification	5 µg/l	< 20 % *	Mean · LW-Wasser Ltg. 1 - 3
Arsenic	< 0,0005 mg/L below limit of quantification	10 µg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Benzene	< 0,00025 mg/L below limit of quantification	1 µg/l	< 25 % *	Mean · LW-Wasser Ltg. 1 - 3
Benzo(a)pyrene	< 0,0000025 mg/L below limit of quantification	10 ng/l	< 25 % *	Mean · LW-Wasser Ltg. 1 - 3
Boron	0,01 mg/L	1 mg/l	1 %	Mean · LW-Wasser Ltg. 1 - 3
Bromate	< 0,0025 mg/L below limit of quantification	10 µg/l	< 25 % *	Mean · LW-Wasser Ltg. 1 - 3
Cadmium	< 0,0001 mg/L below limit of quantification	3 µg/l	< 3 % *	Mean · LW-Wasser Ltg. 1 - 3
Chromium	< 0,0005 mg/L below limit of quantification	25 µg/l	< 2 % *	Mean · LW-Wasser Ltg. 1 - 3
Copper	< 0,001 mg/L below limit of quantification	2 mg/l	< < 0.1 % *	Mean · LW-Wasser Ltg. 1 - 3
Cyanide	< 0,002 mg/L below limit of quantification	50 µg/l	< 4 % *	Mean · LW-Wasser Ltg. 1 - 3
Epichlorohydrin	n.e. mg/L not determined	0.1 µg/l	—	Mean · LW-Wasser Ltg. 1 - 3
Fluoride	0,06 mg/L	1.5 mg/l	4 %	Mean · LW-Wasser Ltg. 1 - 3
Lead	< 0,0005 mg/L below limit of quantification	10 µg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Mercury	< 0,00005 mg/L below limit of quantification	1 µg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Nickel	< 0,001 mg/L below limit of quantification	20 µg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Nitrate	21,4 mg/L	50 mg/l	43 %	Mean · LW-Wasser Ltg. 1 - 3
Nitrite	< 0,01 mg/L below limit of quantification	0.5 mg/l	< 2 % *	Mean · LW-Wasser Ltg. 1 - 3
Selenium	< 0,001 mg/L below limit of quantification	10 µg/l	< 10 % *	Mean · LW-Wasser Ltg. 1 - 3
Tetrachloroethene and Trichloroethene (sum)	< 0,0001 mg/L below limit of quantification	10 µg/l	< 1 % *	Mean · LW-Wasser Ltg. 1 - 3
Trihalomethanes — Total	< 0,005 mg/L below limit of quantification	50 µg/l	< 10 % *	Mean · LW-Wasser Ltg. 1 - 3
Uranium	0,0010 mg/L	10 µg/l	10 %	Mean · LW-Wasser Ltg. 1 - 3
Vinyl chloride	< 0,0005 mg/L below limit of quantification	0.5 µg/l	< 100 % *	Mean · LW-Wasser Ltg. 1 - 3

Indicator parameters (19)

Indicator parameters – LW-Wasser Ltg. 1 3
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	< 0,01 mg/L below limit of quantification	0.2 mg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Ammonium	< 0,01 mg/L below limit of quantification	0.5 mg/l	< 2 % *	Mean · LW-Wasser Ltg. 1 - 3
Calcite dissolution capacity	-2,8 mg/L	5 mg/l CaCO3	—	Mean · LW-Wasser Ltg. 1 - 3
Chloride	34,6 mg/L	250 mg/l	14 %	Mean · LW-Wasser Ltg. 1 - 3
Clostridium perfringens (including spores)	0 Anz./100 mL	0/100 ml	—	Mean · LW-Wasser Ltg. 1 - 3
Coliform bacteria	0 Anz./100 mL	0/100 ml	—	Mean · LW-Wasser Ltg. 1 - 3
Colony count 22 °C	< 1 Anzahl/mL below limit of quantification	ohne anormale Veränderung	—	Mean · LW-Wasser Ltg. 1 - 3
Colony count 36 °C	< 1 Anzahl/mL below limit of quantification	ohne anormale Veränderung	—	Mean · LW-Wasser Ltg. 1 - 3
Colour	< 0,02 1/m below limit of quantification	0.5 m⁻¹	—	Mean · LW-Wasser Ltg. 1 - 3
Conductivity (25 °C)	535 µS/cm	2,790 µS/cm	—	Mean · LW-Wasser Ltg. 1 - 3
Iron	< 0,01 mg/L below limit of quantification	0.2 mg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Manganese	< 0,0025 mg/L below limit of quantification	50 µg/l	< 5 % *	Mean · LW-Wasser Ltg. 1 - 3
Odour	1 TON	für den Verbraucher annehmbar	—	Mean · LW-Wasser Ltg. 1 - 3
Oxidisability	n.e. mg/L O2 not determined	5 mg/l O2	—	Mean · LW-Wasser Ltg. 1 - 3
pH	7,59 -	6,5–9,5	—	Mean · LW-Wasser Ltg. 1 - 3
Sodium	13,7 mg/L	200 mg/l	7 %	Mean · LW-Wasser Ltg. 1 - 3
Sulphate	25,8 mg/L	250 mg/l	10 %	Mean · LW-Wasser Ltg. 1 - 3
Taste	neutral -	für den Verbraucher annehmbar	—	Mean · LW-Wasser Ltg. 1 - 3
Turbidity	0,03 FNU	1 NTU	—	Mean · LW-Wasser Ltg. 1 - 3

Radiology (4)

Radiology – LW-Wasser Ltg. 1 3
Parameter	Value	Parametric value	Share of the parametric value	Reference
Gross alpha activity	< 0,05 Bq/L below limit of quantification	—	—	Mean · LW-Wasser Ltg. 1 - 3
Indicative dose	< 0,1 mSv/Jahr below limit of quantification	0.1 mSv/a	—	Mean · LW-Wasser Ltg. 1 - 3
Radon-222	2,6 Bq/L	100 Bq/l	—	Mean · LW-Wasser Ltg. 1 - 3
Tritium	n.d. Bq/L not determined	100 Bq/l	—	Mean · LW-Wasser Ltg. 1 - 3

Further parameters (8)

Further parameters – LW-Wasser Ltg. 1 3
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	3,52 mol/m3	—	—	Mean · LW-Wasser Ltg. 1 - 3
Calcium	76 mg/L	—	—	Mean · LW-Wasser Ltg. 1 - 3
Carbonate hardness	9,9 °dH	—	—	Mean · LW-Wasser Ltg. 1 - 3
Hardness range (WRMG)	mittel (2) -	—	—	Mean · LW-Wasser Ltg. 1 - 3
Magnesium	11,7 mg/L	—	—	Mean · LW-Wasser Ltg. 1 - 3
Potassium	2,3 mg/L	—	—	Mean · LW-Wasser Ltg. 1 - 3
Sum of alkaline earth metals	2,37 mol/m3	—	—	Mean · LW-Wasser Ltg. 1 - 3
Total hardness	13,3 °dH	—	—	Mean · LW-Wasser Ltg. 1 - 3

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.leutenbach.de/fileadmin/Dateien/Cross7/Startseite/Rathaus/Gemeindeverwaltung/Bauverwaltung/Wasser-,_Energie-,_Abfallwirtschaft/Wasserversorgung/Trinkwasseranalyse_2022_fur_das_Versorgungsgebiet_Nellmersbach_.pdf · Mittelwerte 2022 · retrieved on 11/07/2026

Postcodes in this zone: 71570

Show 11 more supply zones

WW Murrtal

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2024. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.

Water hardness

13.8 °dH

Hardness range mittel (2)

Key values WW Murrtal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	27,7 mg/L	50 mg/l	55 %	Single value
Lead	< 0,001 mg/L below limit of quantification	10 µg/l	< 10 % *	Single value
Escherichia coli (E. coli)	0 Anz./100 mL	0/100 ml	—	Single value
Sulphate	12,0 mg/L	250 mg/l	5 %	Single value
Sodium	10,4 mg/L	200 mg/l	5 %	Single value

Show all recorded parameters (59 — most recent value per parameter)

Microbiology (2)

Microbiology – WW Murrtal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 Anz./100 mL	0/100 ml	—	Single value
Intestinal enterococci	0 Anz./100 mL	0/100 ml	—	Single value

Chemical parameters (26)

Chemical parameters – WW Murrtal
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	< 0,0005 mg/L below limit of quantification	3 µg/l	< 17 % *	Single value
Acrylamide	n.e. mg/L not determined	0.1 µg/l	—	Single value
Antimony	< 0,0005 mg/L below limit of quantification	5 µg/l	< 10 % *	Single value
Arsenic	< 0,001 mg/L below limit of quantification	10 µg/l	< 10 % *	Single value
Benzene	< 0,00010 mg/L below limit of quantification	1 µg/l	< 10 % *	Single value
Benzo(a)pyrene	< 0,000002 mg/L below limit of quantification	10 ng/l	< 20 % *	Single value
Bisphenol A	< 0,00005 mg/L below limit of quantification	2.5 µg/l	< 2 % *	Single value
Boron	0,03 mg/L	1 mg/l	3 %	Single value
Bromate	< 0,003 mg/L below limit of quantification	10 µg/l	< 30 % *	Single value
Cadmium	< 0,0003 mg/L below limit of quantification	3 µg/l	< 10 % *	Single value
Chlorate	n.e. mg/L not determined	70 µg/l	—	Single value
Chromium	< 0,00050 mg/L below limit of quantification	25 µg/l	< 2 % *	Single value
Copper	< 0,005 mg/L below limit of quantification	2 mg/l	< 0.3 % *	Single value
Cyanide	< 0,0050 mg/L below limit of quantification	50 µg/l	< 10 % *	Single value
Epichlorohydrin	n.e. mg/L not determined	0.1 µg/l	—	Single value
Fluoride	0,21 mg/L	1.5 mg/l	14 %	Single value
Lead	< 0,001 mg/L below limit of quantification	10 µg/l	< 10 % *	Single value
Mercury	< 0,0001 mg/L below limit of quantification	1 µg/l	< 10 % *	Single value
Nickel	< 0,002 mg/L below limit of quantification	20 µg/l	< 10 % *	Single value
Nitrate	27,7 mg/L	50 mg/l	55 %	Single value
Nitrite	0,011 mg/L	0.5 mg/l	2 %	Single value
Selenium	< 0,0005 mg/L below limit of quantification	10 µg/l	< 5 % *	Single value
Tetrachloroethene and Trichloroethene (sum)	< 0,0002 mg/L below limit of quantification	10 µg/l	< 2 % *	Single value
Trihalomethanes — Total	< 0,0003 mg/L below limit of quantification	50 µg/l	< 0.6 % *	Single value
Uranium	0,00013 mg/L	10 µg/l	1 %	Single value
Vinyl chloride	< 0,0001 mg/L below limit of quantification	0.5 µg/l	< 20 % *	Single value

Indicator parameters (19)

Indicator parameters – WW Murrtal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	< 0,02 mg/L below limit of quantification	0.2 mg/l	< 10 % *	Single value
Ammonium	< 0,01 mg/L below limit of quantification	0.5 mg/l	< 2 % *	Single value
Calcite dissolution capacity	-6,90 mg/L	5 mg/l CaCO3	—	Single value
Chloride	34,7 mg/L	250 mg/l	14 %	Single value
Clostridium perfringens (including spores)	0 Anz./100 mL	0/100 ml	—	Single value
Coliform bacteria	0 Anz./100 mL	0/100 ml	—	Single value
Colony count 22 °C	0 Anzahl/mL	ohne anormale Veränderung	—	Single value
Colony count 36 °C	0 Anzahl/mL	ohne anormale Veränderung	—	Single value
Colour	< 0,10 1/m below limit of quantification	0.5 m⁻¹	—	Single value
Conductivity (25 °C)	515 µS/cm	2,790 µS/cm	—	Single value
Iron	< 0,005 mg/L below limit of quantification	0.2 mg/l	< 3 % *	Single value
Manganese	< 0,005 mg/L below limit of quantification	50 µg/l	< 10 % *	Single value
Odour	1 TON	für den Verbraucher annehmbar	—	Single value
Oxidisability	0,2 mg/L O2	5 mg/l O2	—	Single value
pH	7,64	6,5–9,5	—	Single value
Sodium	10,4 mg/L	200 mg/l	5 %	Single value
Sulphate	12,0 mg/L	250 mg/l	5 %	Single value
Taste	neutral	für den Verbraucher annehmbar	—	Single value
Turbidity	< 0,05 FNU below limit of quantification	1 NTU	—	Single value

Radiology (2)

Radiology – WW Murrtal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Indicative dose	n.d. mSv/Jahr not determined	0.1 mSv/a	—	Single value
Tritium	n.d. Bq/L not determined	100 Bq/l	—	Single value

Treatment substances (2)

Treatment substances – WW Murrtal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · WW Murrtal
Ozone	-	—	—	Single value · WW Murrtal

Further parameters (8)

Further parameters – WW Murrtal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	3,78 mol/m3	—	—	Single value
Calcium	63,9 mg/L	—	—	Single value
Carbonate hardness	10,4 °dH	—	—	Single value
Hardness range (WRMG)	mittel (2)	—	—	Single value
Magnesium	21,1 mg/L	—	—	Single value
Potassium	1,7 mg/L	—	—	Single value
Sum of alkaline earth metals	2,46 mol/m3	—	—	Single value
Total hardness	13,8 °dH	—	—	Single value

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

Bodenseewasser

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – Bodenseewasser
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · Bodenseewasser
Ozone	X	—	—	Single value · Bodenseewasser

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

Landeswasser

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – Landeswasser
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	X	—	—	Single value · Landeswasser
Ozone	X	—	—	Single value · Landeswasser

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

Rieswasser

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – Rieswasser
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	X	—	—	Single value · Rieswasser
Ozone	X	—	—	Single value · Rieswasser

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

WW Bronn

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – WW Bronn
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · WW Bronn
Ozone	-	—	—	Single value · WW Bronn

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

WW Grimmbach

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – WW Grimmbach
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · WW Grimmbach
Ozone	-	—	—	Single value · WW Grimmbach

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

WW Heilberg

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – WW Heilberg
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · WW Heilberg
Ozone	X	—	—	Single value · WW Heilberg

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

WW Kregelberg

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – WW Kregelberg
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	X	—	—	Single value · WW Kregelberg
Ozone	X	—	—	Single value · WW Kregelberg

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

WW Kupfer

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – WW Kupfer
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · WW Kupfer
Ozone	-	—	—	Single value · WW Kupfer

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

WW Niedernhall

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – WW Niedernhall
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · WW Niedernhall
Ozone	-	—	—	Single value · WW Niedernhall

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

WW Schweighausen

NOW Zweckverband Wasserversorgung Nordostwürttemberg

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

No core values are available for this zone yet.

Show all recorded parameters (2 — most recent value per parameter)

Treatment substances (2)

Treatment substances – WW Schweighausen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	-	—	—	Single value · WW Schweighausen
Ozone	X	—	—	Single value · WW Schweighausen

Source: https://www.now-wasser.de/download/ww_murrtal.pdf · Mittelwerte 2024/25 · retrieved on 13/07/2026

Postcodes in this zone: 71570

Frequently asked questions about drinking water in Oppenweiler

How hard is the water in Oppenweiler?: NOW Zweckverband Wasserversorgung Nordostwürttemberg publishes a total hardness of 13.3 °dH for the supply zone LW-Wasser Ltg. 1 3 (hardness range mittel (2)). The hardness range is a classification under the German Detergents and Cleaning Products Act (soft below 8,4 °dH, medium 8,4 to 14 °dH, hard above that) and not a quality verdict — it indicates how much calcium and magnesium is dissolved in the water. Basis: Publication by the water supplier, retrieved on 11/07/2026.
How much nitrate is in the drinking water in Oppenweiler?: NOW Zweckverband Wasserversorgung Nordostwürttemberg publishes a nitrate value of 21,4 mg/L for the supply zone LW-Wasser Ltg. 1 3. The statutory parametric value is 50 mg/l; the measured value represents 43 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.
Who supplies the drinking water in Oppenweiler?: NOW Zweckverband Wasserversorgung Nordostwürttemberg. The values shown here come from the supply zone LW-Wasser Ltg. 1 3 and apply to the water the supplier delivers. What happens between the building connection and the tap — in old lead pipes, for example — is not covered by these analyses; information on that is provided by owners, the health authority or an examination by an accredited laboratory.

General questions — how current the data is, limit of quantification, parametric values, who is behind this site — are answered under Questions & answers.