How much nitrate is in the drinking water in Firenze?

RWE Power AG publishes a nitrate value of < 0,7 (± 0,1) mg/l for the supply zone WW Dirmerzheim: Reinwassersammelleitung h. den Filtern. The statutory parametric value is 50 mg/l; the measured value lies below it and cannot be specified more precisely below the limit of quantification. Basis: 21.03.2025, retrieved on 11/07/2026.

Who supplies the drinking water in Firenze?

RWE Power AG. The values shown here come from the supply zone WW Dirmerzheim: Reinwassersammelleitung h. den Filtern 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 Firenze

Q: Who supplies the drinking water in Firenze?

RWE Power AG. The values shown here come from the supply zone WW Dirmerzheim: Reinwassersammelleitung h. den Filtern 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.

2 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.

WW Dirmerzheim: Reinwassersammelleitung h. den Filtern

RWE Power AG

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 21/03/2025. 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.

Key values WW Dirmerzheim: Reinwassersammelleitung h. den Filtern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	< 0,7 (± 0,1) mg/l below limit of quantification	50 mg/l	< 1 % *	Single value
Lead	< 2,5 (± 0,3) µg/l below limit of quantification	10 µg/l	< 25 % *	Single value
Escherichia coli (E. coli)	0 (± 0) KBE/100 ml	0/100 ml	—	Single value
Sulphate	173 (± 20,9) mg/l	250 mg/l	—	Single value
Sodium	15,7 (± 1,0) mg/l	200 mg/l	—	Single value

* 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 (87 — most recent value per parameter)

Microbiology (2)

Microbiology – WW Dirmerzheim: Reinwassersammelleitung h. den Filtern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 (± 0) KBE/100 ml	0/100 ml	—	Single value
Intestinal enterococci	0 (± 0) KBE/100 ml	0/100 ml	—	Single value

Chemical parameters (62)

Chemical parameters – WW Dirmerzheim: Reinwassersammelleitung h. den Filtern
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	< 0,5 µg/l below limit of quantification	3 µg/l	< 17 % *	Single value
2,6-Dichlorobenzamide (BAM)	n.b. µg/l not determined	—	—	Single value
Acrylamide	< 0,025 µg/l below limit of quantification	0.1 µg/l	< 25 % *	Single value
Antimony	< 2,0 (± 0,6) µg/l below limit of quantification	5 µg/l	< 40 % *	Single value
Arsenic	< 0,5 (± 0,1) µg/l below limit of quantification	10 µg/l	< 5 % *	Single value
Atrazine	< 0,025 µg/l below limit of quantification	—	—	Single value
Benzene	< 0,25 µg/l below limit of quantification	1 µg/l	< 25 % *	Single value
Benzo(a)pyrene	< 1,0 ng/l below limit of quantification	10 ng/l	< 10 % *	Single value
Benzo(b)fluoranthene	< 1,0 ng/l below limit of quantification	—	—	Single value
Benzo(ghi)perylene	< 1,0 ng/l below limit of quantification	—	—	Single value
Benzo(k)fluoranthene	< 1,0 ng/l below limit of quantification	—	—	Single value
Bisphenol A	n.b. mg/l not determined	2.5 µg/l	—	Single value
Boron	< 0,02 (± 0,01) mg/l below limit of quantification	1 mg/l	< 2 % *	Single value
Bromacil	< 0,025 µg/l below limit of quantification	—	—	Single value
Bromate	< 0,005 (± 0,002) mg/l below limit of quantification	10 µg/l	< 50 % *	Single value
Cadmium	< 0,1 (± 0,1) µg/l below limit of quantification	3 µg/l	< 3 % *	Single value
Carbofuran	< 0,025 µg/l below limit of quantification	—	—	Single value
Chloridazon	< 0,025 µg/l below limit of quantification	—	—	Single value
Chlorotoluron	< 0,025 µg/l below limit of quantification	—	—	Single value
Chromium	< 1,0 (± 0,2) µg/l below limit of quantification	25 µg/l	< 4 % *	Single value
Copper	< 0,2 (± 0,1) µg/l below limit of quantification	2 mg/l	< < 0.1 % *	Single value
Cyanazine	n.b. µg/l not determined	—	—	Single value
Cyanide	< 0,02 (± 0,01) mg/l below limit of quantification	50 µg/l	< 40 % *	Single value
Desethylatrazine	< 0,025 µg/l below limit of quantification	—	—	Single value
Desisopropylatrazine	< 0,025 µg/l below limit of quantification	—	—	Single value
Diuron	< 0,025 µg/l below limit of quantification	—	—	Single value
Epichlorohydrin	< 0,03 µg/l below limit of quantification	0.1 µg/l	< 30 % *	Single value
Ethofumesate	< 0,025 µg/l below limit of quantification	—	—	Single value
Fenuron	n.b. µg/l not determined	—	—	Single value
Flufenacet	n.b. µg/l not determined	—	—	Single value
Fluoride	0,08 (± 0,01) mg/l	1.5 mg/l	—	Single value
Hexazinone	< 0,025 µg/l below limit of quantification	—	—	Single value
Indeno(1,2,3-cd)pyrene	< 1,0 ng/l below limit of quantification	—	—	Single value
Isoproturon	< 0,025 µg/l below limit of quantification	—	—	Single value
Lead	< 2,5 (± 0,3) µg/l below limit of quantification	10 µg/l	< 25 % *	Single value
Mercury	0,02 (± 0) µg/l	1 µg/l	—	Single value
Metalaxyl	n.b. µg/l not determined	—	—	Single value
Metamitron	n.b. µg/l not determined	—	—	Single value
Metazachlor	< 0,025 µg/l below limit of quantification	—	—	Single value
Methabenzthiazuron	< 0,025 µg/l below limit of quantification	—	—	Single value
Metobromuron	< 0,025 µg/l below limit of quantification	—	—	Single value
Metolachlor	< 0,025 µg/l below limit of quantification	—	—	Single value
Metoxuron	< 0,025 µg/l below limit of quantification	—	—	Single value
Metribuzin	< 0,025 µg/l below limit of quantification	—	—	Single value
Nickel	< 2,0 (± 0,3) µg/l below limit of quantification	20 µg/l	< 10 % *	Single value
Nitrate	< 0,7 (± 0,1) mg/l below limit of quantification	50 mg/l	< 1 % *	Single value
Nitrite	< 0,02 (± 0,01) mg/l below limit of quantification	0.5 mg/l	< 4 % *	Single value
Pesticides — Total	n.b. µg/l not determined	0.5 µg/l	—	Single value
Polycyclic aromatic hydrocarbons	n.b. ng/l not determined	0.1 µg/l	—	Single value
Prometryn	n.b. µg/l not determined	—	—	Single value
Propazine	< 0,025 µg/l below limit of quantification	—	—	Single value
Propiconazole	n.b. µg/l not determined	—	—	Single value
Selenium	< 3,0 (± 0,6) µg/l below limit of quantification	10 µg/l	< 30 % *	Single value
Simazine	< 0,025 µg/l below limit of quantification	—	—	Single value
Tebuconazole	< 0,025 µg/l below limit of quantification	—	—	Single value
Terbuthylazine	< 0,025 µg/l below limit of quantification	—	—	Single value
Terbutryn	n.b. µg/l not determined	—	—	Single value
Tetrachloroethene	< 0,5 µg/l below limit of quantification	—	—	Single value
Triadimenol	n.b. µg/l not determined	—	—	Single value
Trichloroethene	< 0,5 µg/l below limit of quantification	—	—	Single value
Uranium	< 0,1 (± 0,1) µg/l below limit of quantification	10 µg/l	< 1 % *	Single value
Vinyl chloride	< 0,5 µg/l below limit of quantification	0.5 µg/l	< 100 % *	Single value

Indicator parameters (15)

Indicator parameters – WW Dirmerzheim: Reinwassersammelleitung h. den Filtern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	< 0,05 (± 0,01) mg/l below limit of quantification	0.2 mg/l	< 25 % *	Single value
Ammonium	< 0,10 (± 0,02) mg/l below limit of quantification	0.5 mg/l	< 20 % *	Single value
Calcite dissolution capacity	-8,4 (± 5) mg/l	5 mg/l CaCO3	—	Single value
Chloride	50,7 (± 2,6) mg/l	250 mg/l	—	Single value
Coliform bacteria	0 (± 0) KBE/100 ml	0/100 ml	—	Single value
Colour	< 0,1 (± 0,1) 1/m below limit of quantification	0.5 m⁻¹	—	Single value
Iron	< 0,02 (± 0,01) mg/l below limit of quantification	0.2 mg/l	< 10 % *	Single value
Manganese	< 0,02 (± 0,01) mg/l below limit of quantification	50 µg/l	< 40 % *	Single value
Odour	geruchlos	für den Verbraucher annehmbar	—	Single value
pH	7,5 (± 0,1)	6,5–9,5	—	Single value
Sodium	15,7 (± 1,0) mg/l	200 mg/l	—	Single value
Sulphate	173 (± 20,9) mg/l	250 mg/l	—	Single value
Taste	geschmacklos	für den Verbraucher annehmbar	—	Single value
Temperature	14,0 (± 0,7) °C	—	—	Single value
Total organic carbon (TOC)	< 0,8 (± 0,1) mg/l below limit of quantification	ohne anormale Veränderung	—	Single value

Further parameters (8)

Further parameters – WW Dirmerzheim: Reinwassersammelleitung h. den Filtern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,85 (± 0,13) mmol/l	—	—	Single value
Base capacity to pH 8.2	0,16 (± 0,09) mmol/l	—	—	Single value
Calcium	117 (± 13,5) mg/l	—	—	Single value
Hydrogen carbonate	173,9 mg/l	—	—	Single value
Magnesium	19,7 (± 2,7) mg/l	—	—	Single value
Oxygen	10,2 (± 1,1) mg/l	—	—	Single value
Potassium	3,1 (± 0,2) mg/l	—	—	Single value
Total hardness	3,73 (± 0,47) mmol/l	—	—	Single value

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.stw-erftstadt.de/fileadmin/Medienablage/Content/Dokumente/Wasser/Trinkwasseranalyse-20250321.pdf · 21.03.2025 · 23.10.2024 - 21.03.2025 · retrieved on 11/07/2026

Postcodes in this zone: 50127 , 50129

Show 1 more supply zone

WW Sindorf und Netzprobenahmestellen im Versorgungsbereich

Westnetz GmbH

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

Water hardness

14.8 °dH

Hardness range hard

Key values WW Sindorf und Netzprobenahmestellen im Versorgungsbereich
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	<1,0 mg/l below limit of quantification	50 mg/l	< 2 % *	Mean
Escherichia coli (E. coli)	0 MPN/100 ml	0/100 ml	—	Mean
Sulphate	91 mg/l	250 mg/l	36 %	Mean
Sodium	12,9 mg/l	200 mg/l	6 %	Mean

Show all recorded parameters (49 — most recent value per parameter)

Microbiology (2)

Microbiology – WW Sindorf und Netzprobenahmestellen im Versorgungsbereich
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 MPN/100 ml	0/100 ml	—	Mean
Intestinal enterococci	0 KBE/100 ml	0/100 ml	—	Mean

Chemical parameters (23)

Chemical parameters – WW Sindorf und Netzprobenahmestellen im Versorgungsbereich
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	<0,0007 mg/l below limit of quantification	3 µg/l	< 23 % *	Mean
Acrylamide	<0,00003 mg/l below limit of quantification	0.1 µg/l	< 30 % *	Mean
Antimony	<0,001 mg/l below limit of quantification	5 µg/l	< 20 % *	Mean
Benzene	<0,00005 mg/l below limit of quantification	1 µg/l	< 5 % *	Mean
Benzo(a)pyrene	<0,000002 mg/l below limit of quantification	10 ng/l	< 20 % *	Mean
Benzo(b)fluoranthene	<0,000005 mg/l below limit of quantification	—	—	Mean
Benzo(ghi)perylene	<0,000005 mg/l below limit of quantification	—	—	Mean
Benzo(k)fluoranthene	<0,000005 mg/l below limit of quantification	—	—	Mean
Bisphenol A	0,000018 mg/l	2.5 µg/l	0.7 %	Mean
Boron	0,01 mg/l	1 mg/l	1 %	Mean
Bromate	<0,001 mg/l below limit of quantification	10 µg/l	< 10 % *	Mean
Chromium	<0,0005 mg/l below limit of quantification	25 µg/l	< 2 % *	Mean
Cyanide	<0,005 mg/l below limit of quantification	50 µg/l	< 10 % *	Mean
Epichlorohydrin	<0,00003 mg/l below limit of quantification	0.1 µg/l	< 30 % *	Mean
Fluoride	0,17 mg/l	1.5 mg/l	11 %	Mean
Indeno(1,2,3-cd)pyrene	<0,000005 mg/l below limit of quantification	—	—	Mean
Mercury	<0,0001 mg/l below limit of quantification	1 µg/l	< 10 % *	Mean
Nitrate	<1,0 mg/l below limit of quantification	50 mg/l	< 2 % *	Mean
Nitrite	<0,005 mg/l below limit of quantification	0.5 mg/l	< 1 % *	Mean
Tetrachloroethene	<0,0003 mg/l below limit of quantification	—	—	Mean
Trichloroethene	<0,0003 mg/l below limit of quantification	—	—	Mean
Uranium	<0,0001 mg/l below limit of quantification	10 µg/l	< 1 % *	Mean
Vinyl chloride	<0,00005 mg/l below limit of quantification	0.5 µg/l	< 10 % *	Mean

Indicator parameters (14)

Indicator parameters – WW Sindorf und Netzprobenahmestellen im Versorgungsbereich
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
Ammonium	<0,2 mg/l below limit of quantification	0.5 mg/l	< 40 % *	Mean
Chloride	21 mg/l	250 mg/l	8 %	Mean
Coliform bacteria	0 MPN/100 ml	0/100 ml	—	Mean
Colour	<0,05 1/m below limit of quantification	0.5 m⁻¹	—	Mean
Iron	<0,01 NTU below limit of quantification	0.2 mg/l	—	Mean
Manganese	<0,005 mg/l below limit of quantification	50 µg/l	< 10 % *	Mean
Odour	ohne	für den Verbraucher annehmbar	—	Mean
pH	7,57	6,5–9,5	—	Mean
Sodium	12,9 mg/l	200 mg/l	6 %	Mean
Sulphate	91 mg/l	250 mg/l	36 %	Mean
Taste	ohne	für den Verbraucher annehmbar	—	Mean
Total organic carbon (TOC)	0,59 mg/l	ohne anormale Veränderung	—	Mean
Turbidity	0,110 NTU	1 NTU	—	Mean

Further parameters (10)

Further parameters – WW Sindorf und Netzprobenahmestellen im Versorgungsbereich
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	3,93 mmol/l	—	—	Mean
Base capacity to pH 8.2	0,23 mmol/l	—	—	Mean
Calcite precipitation capacity	8,7 mg/l	—	—	Mean
Calcium	78,6 mg/l	—	—	Mean
Carbonate hardness	10,8 °dH	—	—	Mean
Magnesium	16,5 mg/l	—	—	Mean
Oxygen	9,0 mg/l	—	—	Mean
Phosphate	<0,05 mg/l below limit of quantification	—	—	Mean
Potassium	3,2 mg/l	—	—	Mean
Total hardness	14,8 °dH	—	—	Mean

Source: https://www.rww.de/fileadmin/assets/pdf/trinkwasseranalyse_beek.pdf · 2. Halbjahr 2025 (Entnahmedaten: 04.02.2025; 08.04.2025; 10.06.2025; 02.09.2025; 14.10.2025) · retrieved on 11/07/2026

Postcodes in this zone: 50127 , 50129

Frequently asked questions about drinking water in Firenze

How much nitrate is in the drinking water in Firenze?: RWE Power AG publishes a nitrate value of < 0,7 (± 0,1) mg/l for the supply zone WW Dirmerzheim: Reinwassersammelleitung h. den Filtern. The statutory parametric value is 50 mg/l; the measured value lies below it and cannot be specified more precisely below the limit of quantification. Basis: 21.03.2025, retrieved on 11/07/2026.
Who supplies the drinking water in Firenze?: RWE Power AG. The values shown here come from the supply zone WW Dirmerzheim: Reinwassersammelleitung h. den Filtern 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.

No data yet

For 22 postcodes 50100, 50121, 50122, 50123, 50124, 50125, 50128, 50130, 50131, 50132, 50133, 50134, 50136, 50137, 50138, 50139, 50140, 50141, 50142, 50143, 50144, 50145 there is no verified assignment yet.