SAINT CHRISTOPHE BERLAND · Saint-Pierre-de-Chartreuse
MAIRIE DE SAINT-CHRISTOPHE-SUR-GUIE
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.15 ● (Near the limit)
0.2 – 1
0.003 ▲
Total Chlorinemg CL2/l
0.18
No limit
0.036
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
20.2
No limit
20.2
Hardnessmg CaCO3/l
244.4
80 – 459
244.4
Hardness fF
24.4
No limit
24.4
pH
7.4
6.5 – 9.5
7.4
TurbidityNTU
0.1
≤ 4
0.01
ColorColor Units
5
≤ 15
5
ConductivityμS / cm
466
≤ 2,500
466
TDSmg/l
298.2estimated
0 – 1,199
298.2
Alkalinitymg CaCO3/l
297
No limit
297
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
10Sampled Jul 2025
≤ 50
0.5
Fluoridemg F/l
0.05Sampled Jul 2025
≤ 1.5
0.015
Mercuryμg Hg/l
0.01Sampled Jul 2025
≤ 1
0.001
Nitritesmg NO2/l
0.01
≤ 0.5
0.004
Nitratesmg NO3/l
11.4
≤ 50
3.42
Minerals
Minerals
Parameter
Unfiltered tap water
Allowed range
Filtered
Magnesiummg/l
3.8Sampled Jul 2025
No limit
3.8
Calciummg/l
94.8Sampled Jul 2025
No limit
94.8
Potassiummg/l
0.9Sampled Jul 2025
No limit
0.9
Chloridemg/l
4.9
≤ 250
4.9
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Aluminiumμg/l
10Sampled Jul 2025
≤ 200
10
Antimonyμg/l
1Sampled Oct 2025
≤ 5
1
Arsenicμg/l
2Sampled Jul 2025
≤ 10
1
Bariumμg/l
10Sampled Jul 2025
≤ 1,000
10
Cadmiumμg/l
1Sampled Oct 2025
≤ 5
1
Chromiumμg/l
5Sampled Oct 2025
≤ 50
5
Copperμg/l
92Sampled Jun 2026
≤ 2,000
4.6
Ironμg/l
10Sampled Jul 2025
≤ 200
10
Manganeseμg/l
10Sampled Jul 2025
≤ 50
10
Leadμg/l
3Sampled Jun 2026
≤ 10
0.15
Nickelμg/l
5Sampled Jun 2026
≤ 20
5
Seleniumμg/l
2Sampled Jul 2025
≤ 10
2
Sodiummg/l
4.1Sampled Jul 2025
≤ 200
4.1
Chlorine by-products
Chlorine by-products
Parameter
Unfiltered tap water
Allowed range
Filtered
Trichloroethyleneμg/l
0.1Sampled Jul 2025
No limit
0.005
Total Trihalomethanesμg/l
3.63Sampled Jul 2025
≤ 100
0.18
Pesticides
Pesticides
Parameter
Unfiltered tap water
Allowed range
Filtered
Heptachlorug/L
0.005Sampled Jul 2025
≤ 0.4
0.005
Total pesticidesug/L
0.5 ● (Near the limit)Sampled Jul 2025
≤ 0.5
0.5 ●
Herbicides
Herbicides
Parameter
Unfiltered tap water
Allowed range
Filtered
D 2 4ug/L
0.02Sampled Jul 2025
≤ 70
0.02
Atrazineug/L
0.005Sampled Jul 2025
≤ 3
0.005
Perfluorinated chemicals
Perfluorinated chemicals
Parameter
Unfiltered tap water
Allowed range
Filtered
PFOAug/L
0.001Sampled Jan 2026
No limit
0.001
PFOSug/L
0.001Sampled Jan 2026
No limit
0.001
PFNAug/L
0.001Sampled Jan 2026
No limit
0.001
Total PFASug/L
0.029Sampled Jan 2026
≤ 0.1
0.003
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
0.02
No limit
0.006
Sulfatemg/l
6.9
No limit
6.9
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.
