Italy · Comune

Drinking water in Grado

One supply zone, published by IrisAcqua S.r.l.. 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).

Grado

IrisAcqua S.r.l.

These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2018. 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

9.5 °dH

Key values Grado
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	7 mg/L	50 mg/l	14 %	Single value · Grado
Sulphate	13,0 mg/L	250 mg/l	5 %	Single value · Grado
Sodium	8,0 mg/L	200 mg/l	4 %	Single value · Grado

Show all recorded parameters (18 — most recent value per parameter)

Chemical parameters (4)

Chemical parameters – Grado
Parameter	Value	Parametric value	Share of the parametric value	Reference
Arsenic	1 µg/L	10 µg/l	10 %	Single value · Grado
Fluoride	0,10 mg/L	1.5 mg/l	7 %	Single value · Grado
Nitrate	7 mg/L	50 mg/l	14 %	Single value · Grado
Nitrite	0,02 mg/L	0.5 mg/l	4 %	Single value · Grado

Indicator parameters (7)

Indicator parameters – Grado
Parameter	Value	Parametric value	Share of the parametric value	Reference
Ammonium	0,02 mg/L	0.5 mg/l	4 %	Single value · Grado
Chloride	13,5 mg/L	250 mg/l	5 %	Single value · Grado
Conductivity (25 °C)	320 µS/cm a 20°C	2,500 µS/cm	—	Single value · Grado
Manganese	5 µg/L	50 µg/l	10 %	Single value · Grado
pH	7,8 unità pH a 20°C	6,5–9,5	—	Single value · Grado
Sodium	8,0 mg/L	200 mg/l	4 %	Single value · Grado
Sulphate	13,0 mg/L	250 mg/l	5 %	Single value · Grado

Treatment substances (1)

Treatment substances – Grado
Parameter	Value	Parametric value	Share of the parametric value	Reference
Total chlorine	0,06 mg/l Cl2	—	—	Single value · Grado

Further parameters (6)

Further parameters – Grado
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	48,5 mg/L	—	—	Single value · Grado
Dry residue	243 mg/L	—	—	Single value · Grado
Hydrogen carbonate	194 mg/L	—	—	Single value · Grado
Magnesium	12 mg/L	—	—	Single value · Grado
Potassium	1 mg/L	—	—	Single value · Grado
Total hardness	17 °F	—	—	Single value · Grado

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.irisacqua.it/wp-content/uploads/2020/07/QualitÃ-dellacqua-I-semestre-2018.pdf · Anno 2018 - I semestre · 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).