ST MARTIN LA PLAINE RIVE GIER · Saint-Romain-en-Jarez
CHOLTON S.A.
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.05 ● (Near the limit)
0.2 – 1
0.001 ▲
Total Chlorinemg CL2/l
0.11
No limit
0.022
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
11.5
No limit
11.5
Hardnessmg CaCO3/l
Not reported
80 – 459
—
pH
8.1
6.5 – 9.5
8.1
TurbidityNTU
0.11Sampled Nov 2025
≤ 4
0.011
ColorColor Units
5Sampled Nov 2025
≤ 15
5
ConductivityμS / cm
256Sampled Nov 2025
≤ 2,500
256
TDSmg/l
163.8Sampled Nov 2025estimated
0 – 1,199
163.8
Pathogens
Pathogens
Parameter
Unfiltered tap water
Allowed range
Filtered
ClostridiumUFC/100ml
0Sampled Nov 2025
≤ 0
0
eColiUFC/100ml
0Sampled Nov 2025
≤ 0
0
BacteriasNMP/100ml
0Sampled Nov 2025
≤ 0
0
EnterococcusUFC/100ml
0Sampled Nov 2025
≤ 0
0
Chemical parameters
Chemical parameters
Parameter
Unfiltered tap water
Allowed range
Filtered
Mercuryμg Hg/l
Not reported
≤ 1
—
Nitritesmg NO2/l
0.02Sampled Jul 2025
≤ 0.5
0.008
Nitratesmg NO3/l
4.5Sampled Jul 2025
≤ 50
1.35
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Antimonyμg/l
1Sampled Jul 2025
≤ 5
1
Arsenicμg/l
Not reported
≤ 10
—
Cadmiumμg/l
1Sampled Jul 2025
≤ 5
1
Chromiumμg/l
5Sampled Jul 2025
≤ 50
5
Ironμg/l
25Sampled Nov 2025
≤ 200
25
Leadμg/l
Not reported
≤ 10
—
Chlorine by-products
Chlorine by-products
Parameter
Unfiltered tap water
Allowed range
Filtered
Trichloroethyleneμg/l
0.1Sampled Oct 2025
No limit
0.005
Total Trihalomethanesμg/l
34.5
≤ 100
1.73
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
0.05Sampled Nov 2025
No limit
0.015
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.
