IGE PAR ST COSMES EN VAIRAIS · Saint-Martin-du-Vieux-Bellême
SIAEP DU PERCHE SUD
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.23
0.2 – 1
0.005 ▲
Total Chlorinemg CL2/l
0.25
No limit
0.05
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
13
No limit
13
Hardnessmg CaCO3/l
429
80 – 459
429
Hardness fF
42.9
No limit
42.9
pH
7.6
6.5 – 9.5
7.6
TurbidityNTU
0.2
≤ 4
0.02
ConductivityμS / cm
889
≤ 2,500
889
TDSmg/l
569estimated
0 – 1,199
569
Alkalinitymg CaCO3/l
384
No limit
384
Pathogens
Pathogens
Parameter
Unfiltered tap water
Allowed range
Filtered
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
0.5
≤ 50
0.15
Minerals
Minerals
Parameter
Unfiltered tap water
Allowed range
Filtered
Chloridemg/l
33
≤ 250
33
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Arsenicμg/l
Not reported
≤ 10
—
Leadμg/l
Not reported
≤ 10
—
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
0.05
No limit
0.015
Sulfatemg/l
52
No limit
52
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.
