Italy · Comune

Drinking water in Castana

One supply zone, published by Pavia Acque. The values come from the publications of the Italian water suppliers (gestori), which D.Lgs. 18/2023 requires of them from 12 January 2026. Italian parametric values apply: trihalomethanes 30 instead of 50 µg/l, chromium 25 µg/l, uranium 30 instead of 10 µg/l; for hardness there is no maximum value, it is given in French degrees (°F).

R-Castana

Pavia Acque

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

12.3 °dH

Key values R-Castana
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	5 mg/L NO3	50 mg/l	10 %	Single value · R-Castana
Lead	<1 µg/L Pb below limit of quantification	10 µg/l	< 10 % *	Single value · R-Castana
Sulphate	21 mg/L SO4	250 mg/l	8 %	Single value · R-Castana
Sodium	15 mg/L Na	200 mg/l	8 %	Single value · R-Castana

* 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 (40 — most recent value per parameter)

Chemical parameters (22)

Chemical parameters – R-Castana
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	<0,1 µg/L below limit of quantification	3 µg/l	< 3 % *	Single value · R-Castana
Antimony	<1 µg/L Sb below limit of quantification	10 µg/l	< 10 % *	Single value · R-Castana
Arsenic	3 µg/L As	10 µg/l	30 %	Single value · R-Castana
Benzene	<0,1 µg/L below limit of quantification	1 µg/l	< 10 % *	Single value · R-Castana
Bromodichloromethane	<0,1 µg/L below limit of quantification	—	—	Single value · R-Castana
Cadmium	<0,5 µg/L Cd below limit of quantification	5 µg/l	< 10 % *	Single value · R-Castana
Chromium	<1 µg/L Cr below limit of quantification	50 µg/l	< 2 % *	Single value · R-Castana
Copper	<0,1 mg/L Cu below limit of quantification	2 mg/l	< 5 % *	Single value · R-Castana
Dibromochloromethane	<0,1 µg/L below limit of quantification	—	—	Single value · R-Castana
Fluoride	<0,1 mg/L F below limit of quantification	1.5 mg/l	< 7 % *	Single value · R-Castana
Lead	<1 µg/L Pb below limit of quantification	10 µg/l	< 10 % *	Single value · R-Castana
Nickel	20 µg/L Ni	20 µg/l	100 %	Single value · R-Castana
Nitrate	5 mg/L NO3	50 mg/l	10 %	Single value · R-Castana
Nitrite	<0,05 mg/L NO2 below limit of quantification	0.5 mg/l	< 10 % *	Single value · R-Castana
Tetrachloroethene	<0,1 µg/L below limit of quantification	—	—	Single value · R-Castana
Tetrachloroethene and Trichloroethene (sum)	<1 µg/L below limit of quantification	10 µg/l	< 10 % *	Single value · R-Castana
Tribromomethane (bromoform)	<0,1 µg/L below limit of quantification	—	—	Single value · R-Castana
Trichloroethene	<0,1 µg/L below limit of quantification	—	—	Single value · R-Castana
Trichloromethane (chloroform)	<0,1 µg/L below limit of quantification	—	—	Single value · R-Castana
Trihalomethanes — Total	<1 µg/L below limit of quantification	30 µg/l	< 3 % *	Single value · R-Castana
Uranium	<1 µg/L U below limit of quantification	30 µg/l	< 3 % *	Single value · R-Castana
Vinyl chloride	<0,1 µg/L below limit of quantification	0.5 µg/l	< 20 % *	Single value · R-Castana

Indicator parameters (9)

Indicator parameters – R-Castana
Parameter	Value	Parametric value	Share of the parametric value	Reference
Ammonium	<0,1 mg/L NH4 below limit of quantification	0.5 mg/l	< 20 % *	Single value · R-Castana
Chloride	13 mg/L Cl	250 mg/l	5 %	Single value · R-Castana
Conductivity (25 °C)	431 µS/cm	2,500 µS/cm	—	Single value · R-Castana
Iron	12 µg/L Fe	0.2 mg/l	6 %	Single value · R-Castana
Manganese	<5 µg/L Mn below limit of quantification	50 µg/l	< 10 % *	Single value · R-Castana
pH	7,6 unità pH	6,5–9,5	—	Single value · R-Castana
Sodium	15 mg/L Na	200 mg/l	8 %	Single value · R-Castana
Sulphate	21 mg/L SO4	250 mg/l	8 %	Single value · R-Castana
Total organic carbon (TOC)	0,37 mg/L C	senza variazioni anomale	—	Single value · R-Castana

Further parameters (9)

Further parameters – R-Castana
Parameter	Value	Parametric value	Share of the parametric value	Reference
Bromide	<0,05 mg/L Br below limit of quantification	—	—	Single value · R-Castana
Calcium	65 mg/L Ca	—	—	Single value · R-Castana
Dry residue	267 mg/L	—	—	Single value · R-Castana
Magnesium	14,0 mg/L Mg	—	—	Single value · R-Castana
Phosphate	<0,15 mg/L P2O5 below limit of quantification	—	—	Single value · R-Castana
Potassium	1,5 mg/L K	—	—	Single value · R-Castana
Total hardness	22 °F	—	—	Single value · R-Castana
Vanadium	<1 µg/L V below limit of quantification	0.14 mg/l	< 0.7 % *	Single value · R-Castana
Zinc	42 µg/L Zn	—	—	Single value · R-Castana

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.paviaacque.it/wp-content/uploads/2024/06/2024.02.05_B.S.P._Arena-Po.pdf · 09/02/2024 · Campionamento 05-feb-2024 · retrieved on 08/07/2026

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.

Legal basis: Art. 18 D.Lgs. 18/2023 as amended by D.Lgs. 102/2025 (transposition of EU Directive 2020/2184). The values are not official — the publication of the Gestore, to which every row links, remains authoritative. Assignment of the comune: information in the analysis document, resolved against the municipality list of ISTAT (territorial status 01.01.2026, CC BY 4.0).