CHATEAU-GONTIER OUEST SUD ET ST FORT · Marigné-Peuton
CC DU PAYS DE CRAON
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.68
0.2 – 1
0.014 ▲
Total Chlorinemg CL2/l
0.69
No limit
0.14
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
22.3
No limit
22.3
Hardnessmg CaCO3/l
136
80 – 459
136
Hardness fF
13.6
No limit
13.6
pH
7.7
6.5 – 9.5
7.7
TurbidityNTU
0.3
≤ 4
0.03
ColorColor Units
5
≤ 15
5
ConductivityμS / cm
500
≤ 2,500
500
TDSmg/l
320estimated
0 – 1,199
320
Alkalinitymg CaCO3/l
103
No limit
103
Bicarbonatemg HCO3/l
114Sampled Jun 2026
No limit
114
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
Cyanide totalμg CN/l
5Sampled Jun 2026
≤ 50
0.25
Fluoridemg F/l
0.057Sampled Jun 2026
≤ 1.5
0.017
Mercuryμg Hg/l
0.01Sampled Jun 2026
≤ 1
0.001
Nitritesmg NO2/l
0.01
≤ 0.5
0.004
Nitratesmg NO3/l
5.6
≤ 50
1.68
Minerals
Minerals
Parameter
Unfiltered tap water
Allowed range
Filtered
Magnesiummg/l
7.3Sampled Jun 2026
No limit
7.3
Calciummg/l
44Sampled Jun 2026
No limit
44
Potassiummg/l
4.8Sampled Jun 2026
No limit
4.8
Chloridemg/l
75.4
≤ 250
75.4
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Aluminiumμg/l
5Sampled Jun 2026
≤ 200
5
Antimonyμg/l
0.14Sampled Jun 2026
≤ 5
0.14
Arsenicμg/l
0.2Sampled Jun 2026
≤ 10
0.1
Bariumμg/l
21Sampled Jun 2026
≤ 1,000
21
Cadmiumμg/l
0.02Sampled Jun 2026
≤ 5
0.02
Chromiumμg/l
0.6Sampled Jun 2026
≤ 50
0.6
Copperμg/l
5.6Sampled Oct 2025
≤ 2,000
0.28
Ironμg/l
6
≤ 200
6
Manganeseμg/l
0.5
≤ 50
0.5
Leadμg/l
0.2Sampled Oct 2025
≤ 10
0.01
Nickelμg/l
1.1Sampled Oct 2025
≤ 20
1.1
Seleniumμg/l
0.2Sampled Jun 2026
≤ 10
0.2
Sodiummg/l
30.2Sampled Jun 2026
≤ 200
30.2
Chlorine by-products
Chlorine by-products
Parameter
Unfiltered tap water
Allowed range
Filtered
Trichloroethyleneμg/l
0.1Sampled Jun 2026
No limit
0.005
Total Trihalomethanesμg/l
19Sampled Dec 2025
≤ 100
0.95
Pesticides
Pesticides
Parameter
Unfiltered tap water
Allowed range
Filtered
Chlordaneug/L
0Sampled Jun 2026
≤ 2
0
Heptachlorug/L
0.001Sampled Jun 2026
≤ 0.4
0.001
Total pesticidesug/L
0Sampled Jun 2026
≤ 0.5
0
Herbicides
Herbicides
Parameter
Unfiltered tap water
Allowed range
Filtered
D 2 4ug/L
0.02Sampled Jun 2026
≤ 70
0.02
Atrazineug/L
0.01Sampled Jun 2026
≤ 3
0.01
Perfluorinated chemicals
Perfluorinated chemicals
Parameter
Unfiltered tap water
Allowed range
Filtered
PFOAug/L
0.001Sampled Jun 2026
No limit
0.001
PFOSug/L
0.002Sampled Jun 2026
No limit
0.002
PFNAug/L
0.001Sampled Jun 2026
No limit
0.001
Total PFASug/L
0.012Sampled Jun 2026
≤ 0.1
0.001
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
20.8
No limit
20.8
Uraniumug/L
0.04Sampled Jun 2026
No limit
0.04
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.
