ST LAURENT ROCHEFORT · Sainte-Agathe-la-Bouteresse
CA LOIRE FOREZ AGGLOMÉRATION
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.03 ▲ (Outside the range)
0.2 – 1
0.001 ▲
Total Chlorinemg CL2/l
0.03
No limit
0.006
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
22.3
No limit
22.3
Hardnessmg CaCO3/l
44.6 ● (Near the limit)
80 – 459
44.6 ●
Hardness fF
4.46
No limit
4.46
pH
6.9
6.5 – 9.5
6.9
TurbidityNTU
0.91
≤ 4
0.091
ColorColor Units
5
≤ 15
5
ConductivityμS / cm
146
≤ 2,500
146
TDSmg/l
93.4estimated
0 – 1,199
93.4
Alkalinitymg CaCO3/l
35.7
No limit
35.7
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 Sept 2025
≤ 50
0.5
Fluoridemg F/l
0.13Sampled Sept 2025
≤ 1.5
0.039
Mercuryμg Hg/l
0.01Sampled Sept 2025
≤ 1
0.001
Nitritesmg NO2/l
0.01
≤ 0.5
0.004
Nitratesmg NO3/l
2.1
≤ 50
0.63
Minerals
Minerals
Parameter
Unfiltered tap water
Allowed range
Filtered
Magnesiummg/l
2.7
No limit
2.7
Calciummg/l
13.4
No limit
13.4
Potassiummg/l
1.8Sampled Sept 2025
No limit
1.8
Chloridemg/l
19.3
≤ 250
19.3
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Aluminiumμg/l
10Sampled Sept 2025
≤ 200
10
Antimonyμg/l
1Sampled Mar 2025
≤ 5
1
Arsenicμg/l
4Sampled Sept 2025
≤ 10
2
Bariumμg/l
19Sampled Sept 2025
≤ 1,000
19
Cadmiumμg/l
1Sampled Mar 2025
≤ 5
1
Chromiumμg/l
5Sampled Mar 2025
≤ 50
5
Ironμg/l
10Sampled Sept 2025
≤ 200
10
Manganeseμg/l
10Sampled Sept 2025
≤ 50
10
Leadμg/l
Not reported
≤ 10
—
Seleniumμg/l
2Sampled Sept 2025
≤ 10
2
Sodiummg/l
12.4Sampled Sept 2025
≤ 200
12.4
Chlorine by-products
Chlorine by-products
Parameter
Unfiltered tap water
Allowed range
Filtered
Trichloroethyleneμg/l
0.1Sampled Sept 2025
No limit
0.005
Total Trihalomethanesμg/l
0.5Sampled Sept 2025
≤ 100
0.025
Pesticides
Pesticides
Parameter
Unfiltered tap water
Allowed range
Filtered
Heptachlorug/L
0.005Sampled Sept 2025
≤ 0.4
0.005
Total pesticidesug/L
0.5 ● (Near the limit)Sampled Sept 2025
≤ 0.5
0.5 ●
Herbicides
Herbicides
Parameter
Unfiltered tap water
Allowed range
Filtered
D 2 4ug/L
0.02Sampled Sept 2025
≤ 70
0.02
Atrazineug/L
0.005Sampled Sept 2025
≤ 3
0.005
Perfluorinated chemicals
Perfluorinated chemicals
Parameter
Unfiltered tap water
Allowed range
Filtered
PFOAug/L
0.001Sampled Sept 2025
No limit
0.001
PFOSug/L
0.001Sampled Sept 2025
No limit
0.001
PFNAug/L
0.001Sampled Sept 2025
No limit
0.001
Total PFASug/L
0.029Sampled Sept 2025
≤ 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
0.01
No limit
0.003
Sulfatemg/l
5.4
No limit
5.4
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.
