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SAINT HEAND SAINT ETIENNE · Saint-Genest-Lerpt

SAUR

Water safety

Water safety
ParameterUnfiltered tap waterAllowed rangeFiltered
Free Chlorinemg CL2/l0.320.2 – 10.006
Total Chlorinemg CL2/l0.38No limit0.076

General

General
ParameterUnfiltered tap waterAllowed rangeFiltered
TemperatureC24.5No limit24.5
Hardnessmg CaCO3/l100.780 – 459100.7
Hardness fF10.1No limit10.1
pH7.86.5 – 9.57.8
TurbidityNTU0.1≤ 40.01
ColorColor Units5≤ 155
ConductivityμS / cm241≤ 2,500241
TDSmg/l154.2estimated0 – 1,199154.2
Alkalinitymg CaCO3/l89.5No limit89.5

Pathogens

Pathogens
ParameterUnfiltered tap waterAllowed rangeFiltered
ClostridiumUFC/100ml0≤ 00
eColiUFC/100ml0≤ 00
BacteriasNMP/100ml0≤ 00
EnterococcusUFC/100ml0≤ 00

Chemical parameters

Chemical parameters
ParameterUnfiltered tap waterAllowed rangeFiltered
Cyanide totalμg CN/l10Sampled Jun 2026≤ 500.5
Fluoridemg F/l0.06Sampled Jun 2026≤ 1.50.018
Mercuryμg Hg/l0.5Sampled Jun 2026≤ 10.05
Nitritesmg NO2/l0.01≤ 0.50.004
Nitratesmg NO3/l2.7≤ 500.81

Minerals

Minerals
ParameterUnfiltered tap waterAllowed rangeFiltered
Magnesiummg/l1.8No limit1.8
Calciummg/l37.3No limit37.3
Potassiummg/l1.3Sampled Jun 2026No limit1.3
Chloridemg/l22.8≤ 25022.8

Metals

Metals
ParameterUnfiltered tap waterAllowed rangeFiltered
Aluminiumμg/l10Sampled Jun 2026≤ 20010
Antimonyμg/l1Sampled Jun 2026≤ 51
Arsenicμg/l2Sampled Jun 2026≤ 101
Bariumμg/l12Sampled Jun 2026≤ 1,00012
Cadmiumμg/l1Sampled Jun 2026≤ 51
Chromiumμg/l5Sampled Jun 2026≤ 505
Copperμg/l23Sampled Jun 2026≤ 2,0001.15
Ironμg/l10≤ 20010
Manganeseμg/l10Sampled Jun 2026≤ 5010
Leadμg/l2Sampled Jun 2026≤ 100.1
Nickelμg/l5Sampled Jun 2026≤ 205
Seleniumμg/l2Sampled Jun 2026≤ 102
Sodiummg/l8.3Sampled Jun 2026≤ 2008.3

Chlorine by-products

Chlorine by-products
ParameterUnfiltered tap waterAllowed rangeFiltered
Trichloroethyleneμg/l0.1Sampled Jun 2026No limit0.005
Total Trihalomethanesμg/l44.1≤ 1002.21

Haloacetic acids

Haloacetic acids
ParameterUnfiltered tap waterAllowed rangeFiltered
Total haloacetic acidsμg/l9Sampled Jun 2026≤ 600.45

Pesticides

Pesticides
ParameterUnfiltered tap waterAllowed rangeFiltered
Heptachlorug/L0.005Sampled Jun 2026≤ 0.40.005
Total pesticidesug/L0.5 (Near the limit)Sampled Jun 2026≤ 0.50.5

Herbicides

Herbicides
ParameterUnfiltered tap waterAllowed rangeFiltered
D 2 4ug/L0.02Sampled Jun 2026≤ 700.02
Atrazineug/L0.005Sampled Jun 2026≤ 30.005

Perfluorinated chemicals

Perfluorinated chemicals
ParameterUnfiltered tap waterAllowed rangeFiltered
PFOAug/L0.001Sampled Jun 2026No limit0.001
PFOSug/L0.001Sampled Jun 2026No limit0.001
PFNAug/L0.001Sampled Jun 2026No limit0.001
Total PFASug/L0.014Sampled Jun 2026≤ 0.10.001
PFAS 4ng/lNot reportedNo limit—
PFAS 21ng/lNot reportedNo limit—

Other

Other
ParameterUnfiltered tap waterAllowed rangeFiltered
Ammoniamg/l0.01No limit0.003
Sulfatemg/l4.7No limit4.7
Uraniumug/L10Sampled Jun 2026No limit10

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.