AZÉ ZONE AGGLOMÉRÉE NORD-OUEST · Bierné-les-Villages
SAUR FRANCE
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.07 ● (Near the limit)
0.2 – 1
0.001 ▲
Total Chlorinemg CL2/l
0.15
No limit
0.03
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
26.1
No limit
26.1
Hardnessmg CaCO3/l
130
80 – 459
130
Hardness fF
13
No limit
13
pH
8.1
6.5 – 9.5
8.1
TurbidityNTU
0.3
≤ 4
0.03
ColorColor Units
5
≤ 15
5
ConductivityμS / cm
473
≤ 2,500
473
TDSmg/l
302.7estimated
0 – 1,199
302.7
Alkalinitymg CaCO3/l
74
No limit
74
Pathogens
Pathogens
Parameter
Unfiltered tap water
Allowed range
Filtered
ClostridiumUFC/100ml
0
≤ 0
0
eColiUFC/100ml
0
≤ 0
0
BacteriasNMP/100ml
0
≤ 0
0
EnterococcusUFC/100ml
0
≤ 0
0
Chemical parameters
Chemical parameters
Parameter
Unfiltered tap water
Allowed range
Filtered
Mercuryμg Hg/l
Not reported
≤ 1
—
Nitritesmg NO2/l
0.01
≤ 0.5
0.004
Nitratesmg NO3/l
2.3
≤ 50
0.69
Minerals
Minerals
Parameter
Unfiltered tap water
Allowed range
Filtered
Chloridemg/l
84.1
≤ 250
84.1
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Antimonyμg/l
0.12Sampled Oct 2025
≤ 5
0.12
Arsenicμg/l
Not reported
≤ 10
—
Cadmiumμg/l
0.01Sampled Oct 2025
≤ 5
0.01
Chromiumμg/l
0.3Sampled Oct 2025
≤ 50
0.3
Copperμg/l
17.6Sampled Jun 2026
≤ 2,000
0.88
Ironμg/l
13
≤ 200
13
Manganeseμg/l
0.5
≤ 50
0.5
Leadμg/l
0.1Sampled Jun 2026
≤ 10
0.005
Nickelμg/l
1.9Sampled Jun 2026
≤ 20
1.9
Chlorine by-products
Chlorine by-products
Parameter
Unfiltered tap water
Allowed range
Filtered
Total Trihalomethanesμg/l
45Sampled Jun 2026
≤ 100
2.25
Haloacetic acids
Haloacetic acids
Parameter
Unfiltered tap water
Allowed range
Filtered
Total haloacetic acidsμg/l
9.3Sampled Jun 2026
≤ 60
0.47
Perfluorinated chemicals
Perfluorinated chemicals
Parameter
Unfiltered tap water
Allowed range
Filtered
Total PFASug/L
Not reported
≤ 0.1
—
PFAS 4ng/l
Not reported
No limit
—
PFAS 21ng/l
Not reported
No limit
—
Other
Other
Parameter
Unfiltered tap water
Allowed range
Filtered
Ammoniamg/l
0.01
No limit
0.003
Sulfatemg/l
22.8
No limit
22.8
Data from the French health inspection of drinking water (Ministry of Health, regional health agencies), per distribution unit. Quality ranges are based on WHO guidelines, EU Directive 2020/2184 and the French public health code.
