BELLOU LE TRICHARD · Saint-Martin-du-Vieux-Bellême
SIAEP DU PERCHE SUD
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.11 ● (Near the limit)
0.2 – 1
0.002 ▲
Total Chlorinemg CL2/l
0.23
No limit
0.046
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
24
No limit
24
Hardnessmg CaCO3/l
353
80 – 459
353
Hardness fF
35.3
No limit
35.3
pH
7.6
6.5 – 9.5
7.6
TurbidityNTU
0.2
≤ 4
0.02
ConductivityμS / cm
717
≤ 2,500
717
TDSmg/l
458.9estimated
0 – 1,199
458.9
Alkalinitymg CaCO3/l
303
No limit
303
Bicarbonatemg HCO3/l
366Sampled Feb 2026
No limit
366
Pathogens
Pathogens
Parameter
Unfiltered tap water
Allowed range
Filtered
ClostridiumUFC/100ml
0Sampled Oct 2025
≤ 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
Cyanide totalμg CN/l
10Sampled Feb 2026
≤ 50
0.5
Fluoridemg F/l
0.085Sampled Feb 2026
≤ 1.5
0.026
Mercuryμg Hg/l
0.05Sampled Feb 2026
≤ 1
0.005
Nitritesmg NO2/l
0.01
≤ 0.5
0.004
Nitratesmg NO3/l
14
≤ 50
4.2
Minerals
Minerals
Parameter
Unfiltered tap water
Allowed range
Filtered
Magnesiummg/l
12Sampled Feb 2026
No limit
12
Calciummg/l
130Sampled Feb 2026
No limit
130
Potassiummg/l
2.2Sampled Feb 2026
No limit
2.2
Chloridemg/l
21
≤ 250
21
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Aluminiumμg/l
2Sampled Feb 2026
≤ 200
2
Antimonyμg/l
0.5Sampled Feb 2026
≤ 5
0.5
Arsenicμg/l
0.32Sampled Feb 2026
≤ 10
0.16
Bariumμg/l
11Sampled Feb 2026
≤ 1,000
11
Cadmiumμg/l
0.025Sampled Feb 2026
≤ 5
0.025
Chromiumμg/l
1Sampled Feb 2026
≤ 50
1
Ironμg/l
3.1
≤ 200
3.1
Manganeseμg/l
1Sampled Feb 2026
≤ 50
1
Leadμg/l
Not reported
≤ 10
—
Seleniumμg/l
1.1Sampled Feb 2026
≤ 10
1.1
Sodiummg/l
7Sampled Feb 2026
≤ 200
7
Chlorine by-products
Chlorine by-products
Parameter
Unfiltered tap water
Allowed range
Filtered
Trichloroethyleneμg/l
0.05Sampled Feb 2026
No limit
0.003
Total Trihalomethanesμg/l
6.5Sampled Feb 2026
≤ 100
0.33
Haloacetic acids
Haloacetic acids
Parameter
Unfiltered tap water
Allowed range
Filtered
Total haloacetic acidsμg/l
1.1Sampled Feb 2026
≤ 60
0.055
Pesticides
Pesticides
Parameter
Unfiltered tap water
Allowed range
Filtered
Heptachlorug/L
0.005Sampled Feb 2026
≤ 0.4
0.005
Total pesticidesug/L
0.044Sampled Feb 2026
≤ 0.5
0.044
Herbicides
Herbicides
Parameter
Unfiltered tap water
Allowed range
Filtered
D 2 4ug/L
0.02Sampled Feb 2026
≤ 70
0.02
Atrazineug/L
0.01Sampled Feb 2026
≤ 3
0.01
Perfluorinated chemicals
Perfluorinated chemicals
Parameter
Unfiltered tap water
Allowed range
Filtered
PFOAug/L
0.001Sampled Feb 2026
No limit
0.001
PFOSug/L
0.001Sampled Feb 2026
No limit
0.001
PFNAug/L
0.001Sampled Feb 2026
No limit
0.001
Total PFASug/L
0.001Sampled Feb 2026
≤ 0.1
0
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
39
No limit
39
Uraniumug/L
0.22Sampled Feb 2026
No limit
0.22
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.
